[deliverable/linux.git] / drivers / net / ethernet / freescale / fs_enet / mac-fec.c

/*
 * Freescale Ethernet controllers
 *
 * Copyright (c) 2005 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/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_address.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/gfp.h>

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

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

#include "fs_enet.h"
#include "fec.h"

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

#if defined(CONFIG_CPM1)
/* for a CPM1 __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_in32(addr)	__raw_readl(addr)
#define __fs_in16(addr)	__raw_readw(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)
#endif

/* write */
#define FW(_fecp, _reg, _v) __fs_out32(&(_fecp)->fec_ ## _reg, (_v))

/* read */
#define FR(_fecp, _reg)	__fs_in32(&(_fecp)->fec_ ## _reg)

/* set bits */
#define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) | (_v))

/* clear bits */
#define FC(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) & ~(_v))

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

static int whack_reset(struct fec __iomem *fecp)
{
	int i;

	FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
	for (i = 0; i < FEC_RESET_DELAY; i++) {
		if ((FR(fecp, ecntrl) & FEC_ECNTRL_RESET) == 0)
			return 0;	/* OK */
		udelay(1);
	}

	return -1;
}

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

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

	fep->fec.fecp = of_iomap(ofdev->dev.of_node, 0);
	if (!fep->fcc.fccp)
		return -EINVAL;

	return 0;
}

#define FEC_NAPI_RX_EVENT_MSK	(FEC_ENET_RXF | FEC_ENET_RXB)
#define FEC_NAPI_TX_EVENT_MSK	(FEC_ENET_TXF | FEC_ENET_TXB)
#define FEC_RX_EVENT		(FEC_ENET_RXF)
#define FEC_TX_EVENT		(FEC_ENET_TXF)
#define FEC_ERR_EVENT_MSK	(FEC_ENET_HBERR | FEC_ENET_BABR | \
				 FEC_ENET_BABT | FEC_ENET_EBERR)

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

	if (do_pd_setup(fep) != 0)
		return -EINVAL;

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

	fep->ev_napi_rx = FEC_NAPI_RX_EVENT_MSK;
	fep->ev_napi_tx = FEC_NAPI_TX_EVENT_MSK;
	fep->ev_rx = FEC_RX_EVENT;
	fep->ev_tx = FEC_TX_EVENT;
	fep->ev_err = FEC_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_base = (void __force __iomem *)dma_alloc_coherent(fep->dev,
					    (fpi->tx_ring + fpi->rx_ring) *
					    sizeof(cbd_t), &fep->ring_mem_addr,
					    GFP_KERNEL);
	if (fep->ring_base == NULL)
		return -ENOMEM;

	return 0;
}

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

	if(fep->ring_base)
		dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring)
					* sizeof(cbd_t),
					(void __force *)fep->ring_base,
					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);
	struct fec __iomem *fecp = fep->fec.fecp;

	FS(fecp, r_cntrl, FEC_RCNTRL_PROM);
}

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

	fep->fec.hthi = 0;
	fep->fec.htlo = 0;
}

static void set_multicast_one(struct net_device *dev, const u8 *mac)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	int temp, hash_index, i, j;
	u32 crc, csrVal;
	u8 byte, msb;

	crc = 0xffffffff;
	for (i = 0; i < 6; i++) {
		byte = mac[i];
		for (j = 0; j < 8; j++) {
			msb = crc >> 31;
			crc <<= 1;
			if (msb ^ (byte & 0x1))
				crc ^= FEC_CRC_POLY;
			byte >>= 1;
		}
	}

	temp = (crc & 0x3f) >> 1;
	hash_index = ((temp & 0x01) << 4) |
		     ((temp & 0x02) << 2) |
		     ((temp & 0x04)) |
		     ((temp & 0x08) >> 2) |
		     ((temp & 0x10) >> 4);
	csrVal = 1 << hash_index;
	if (crc & 1)
		fep->fec.hthi |= csrVal;
	else
		fep->fec.htlo |= csrVal;
}

static void set_multicast_finish(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;

	/* if all multi or too many multicasts; just enable all */
	if ((dev->flags & IFF_ALLMULTI) != 0 ||
	    netdev_mc_count(dev) > FEC_MAX_MULTICAST_ADDRS) {
		fep->fec.hthi = 0xffffffffU;
		fep->fec.htlo = 0xffffffffU;
	}

	FC(fecp, r_cntrl, FEC_RCNTRL_PROM);
	FW(fecp, grp_hash_table_high, fep->fec.hthi);
	FW(fecp, grp_hash_table_low, fep->fec.htlo);
}

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);
}

static void restart(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;
	const struct fs_platform_info *fpi = fep->fpi;
	dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
	int r;
	u32 addrhi, addrlo;

	struct mii_bus* mii = fep->phydev->bus;
	struct fec_info* fec_inf = mii->priv;

	r = whack_reset(fep->fec.fecp);
	if (r != 0)
		dev_err(fep->dev, "FEC Reset FAILED!\n");
	/*
	 * Set station address.
	 */
	addrhi = ((u32) dev->dev_addr[0] << 24) |
		 ((u32) dev->dev_addr[1] << 16) |
		 ((u32) dev->dev_addr[2] <<  8) |
		  (u32) dev->dev_addr[3];
	addrlo = ((u32) dev->dev_addr[4] << 24) |
		 ((u32) dev->dev_addr[5] << 16);
	FW(fecp, addr_low, addrhi);
	FW(fecp, addr_high, addrlo);

	/*
	 * Reset all multicast.
	 */
	FW(fecp, grp_hash_table_high, fep->fec.hthi);
	FW(fecp, grp_hash_table_low, fep->fec.htlo);

	/*
	 * Set maximum receive buffer size.
	 */
	FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
#ifdef CONFIG_FS_ENET_MPC5121_FEC
	FW(fecp, r_cntrl, PKT_MAXBUF_SIZE << 16);
#else
	FW(fecp, r_hash, PKT_MAXBUF_SIZE);
#endif

	/* get physical address */
	rx_bd_base_phys = fep->ring_mem_addr;
	tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;

	/*
	 * Set receive and transmit descriptor base.
	 */
	FW(fecp, r_des_start, rx_bd_base_phys);
	FW(fecp, x_des_start, tx_bd_base_phys);

	fs_init_bds(dev);

	/*
	 * Enable big endian and don't care about SDMA FC.
	 */
#ifdef CONFIG_FS_ENET_MPC5121_FEC
	FS(fecp, dma_control, 0xC0000000);
#else
	FW(fecp, fun_code, 0x78000000);
#endif

	/*
	 * Set MII speed.
	 */
	FW(fecp, mii_speed, fec_inf->mii_speed);

	/*
	 * Clear any outstanding interrupt.
	 */
	FW(fecp, ievent, 0xffc0);
#ifndef CONFIG_FS_ENET_MPC5121_FEC
	FW(fecp, ivec, (virq_to_hw(fep->interrupt) / 2) << 29);

	FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE);	/* MII enable */
#else
	/*
	 * Only set MII/RMII mode - do not touch maximum frame length
	 * configured before.
	 */
	FS(fecp, r_cntrl, fpi->use_rmii ?
			FEC_RCNTRL_RMII_MODE : FEC_RCNTRL_MII_MODE);
#endif
	/*
	 * adjust to duplex mode
	 */
	if (fep->phydev->duplex) {
		FC(fecp, r_cntrl, FEC_RCNTRL_DRT);
		FS(fecp, x_cntrl, FEC_TCNTRL_FDEN);	/* FD enable */
	} else {
		FS(fecp, r_cntrl, FEC_RCNTRL_DRT);
		FC(fecp, x_cntrl, FEC_TCNTRL_FDEN);	/* FD disable */
	}

	/* Restore multicast and promiscuous settings */
	set_multicast_list(dev);

	/*
	 * Enable interrupts we wish to service.
	 */
	FW(fecp, imask, FEC_ENET_TXF | FEC_ENET_TXB |
	   FEC_ENET_RXF | FEC_ENET_RXB);

	/*
	 * And last, enable the transmit and receive processing.
	 */
	FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
	FW(fecp, r_des_active, 0x01000000);
}

static void stop(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	const struct fs_platform_info *fpi = fep->fpi;
	struct fec __iomem *fecp = fep->fec.fecp;

	struct fec_info* feci= fep->phydev->bus->priv;

	int i;

	if ((FR(fecp, ecntrl) & FEC_ECNTRL_ETHER_EN) == 0)
		return;		/* already down */

	FW(fecp, x_cntrl, 0x01);	/* Graceful transmit stop */
	for (i = 0; ((FR(fecp, ievent) & 0x10000000) == 0) &&
	     i < FEC_RESET_DELAY; i++)
		udelay(1);

	if (i == FEC_RESET_DELAY)
		dev_warn(fep->dev, "FEC timeout on graceful transmit stop\n");
	/*
	 * Disable FEC. Let only MII interrupts.
	 */
	FW(fecp, imask, 0);
	FC(fecp, ecntrl, FEC_ECNTRL_ETHER_EN);

	fs_cleanup_bds(dev);

	/* shut down FEC1? that's where the mii bus is */
	if (fpi->has_phy) {
		FS(fecp, r_cntrl, fpi->use_rmii ?
				FEC_RCNTRL_RMII_MODE :
				FEC_RCNTRL_MII_MODE);	/* MII/RMII enable */
		FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
		FW(fecp, ievent, FEC_ENET_MII);
		FW(fecp, mii_speed, feci->mii_speed);
	}
}

static void napi_clear_rx_event(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;

	FW(fecp, ievent, FEC_NAPI_RX_EVENT_MSK);
}

static void napi_enable_rx(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;

	FS(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
}

static void napi_disable_rx(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;

	FC(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
}

static void napi_clear_tx_event(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;

	FW(fecp, ievent, FEC_NAPI_TX_EVENT_MSK);
}

static void napi_enable_tx(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;

	FS(fecp, imask, FEC_NAPI_TX_EVENT_MSK);
}

static void napi_disable_tx(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;

	FC(fecp, imask, FEC_NAPI_TX_EVENT_MSK);
}

static void rx_bd_done(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;

	FW(fecp, r_des_active, 0x01000000);
}

static void tx_kickstart(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;

	FW(fecp, x_des_active, 0x01000000);
}

static u32 get_int_events(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	struct fec __iomem *fecp = fep->fec.fecp;

	return FR(fecp, ievent) & FR(fecp, imask);
}

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

	FW(fecp, ievent, int_events);
}

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

	dev_warn(fep->dev, "FEC 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(struct fec))
		return -EINVAL;

	memcpy_fromio(p, fep->fec.fecp, sizeof(struct fec));

	return 0;
}

static int get_regs_len(struct net_device *dev)
{
	return sizeof(struct fec);
}

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

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

const struct fs_ops fs_fec_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,
	.napi_clear_tx_event	= napi_clear_tx_event,
	.napi_enable_tx		= napi_enable_tx,
	.napi_disable_tx	= napi_disable_tx,
	.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,
};
Commit	Line	Data
48257c4f PA	1	/*
	2	* Freescale Ethernet controllers
	3	*
9b8ee8e7	4	* Copyright (c) 2005 Intracom S.A.
48257c4f PA	5	* by Pantelis Antoniou <panto@intracom.gr>
48257c4f PA	6	*
9b8ee8e7	7	* 2005 (c) MontaVista Software, Inc.
48257c4f PA	8	* Vitaly Bordug <vbordug@ru.mvista.com>
48257c4f PA	9	*
9b8ee8e7 VB	10	* This file is licensed under the terms of the GNU General Public License
9b8ee8e7 VB	11	* version 2. This program is licensed "as is" without any warranty of any
48257c4f PA	12	* kind, whether express or implied.
	13	*/
	14
48257c4f PA	15	#include <linux/module.h>
	16	#include <linux/kernel.h>
	17	#include <linux/types.h>
48257c4f PA	18	#include <linux/string.h>
	19	#include <linux/ptrace.h>
	20	#include <linux/errno.h>
	21	#include <linux/ioport.h>
48257c4f	22	#include <linux/interrupt.h>
48257c4f PA	23	#include <linux/delay.h>
	24	#include <linux/netdevice.h>
	25	#include <linux/etherdevice.h>
	26	#include <linux/skbuff.h>
	27	#include <linux/spinlock.h>
	28	#include <linux/mii.h>
	29	#include <linux/ethtool.h>
	30	#include <linux/bitops.h>
	31	#include <linux/fs.h>
f7b99969	32	#include <linux/platform_device.h>
5af50730	33	#include <linux/of_address.h>
b219108c	34	#include <linux/of_device.h>
5af50730	35	#include <linux/of_irq.h>
5a0e3ad6	36	#include <linux/gfp.h>
48257c4f PA	37
	38	#include <asm/irq.h>
	39	#include <asm/uaccess.h>
	40
	41	#ifdef CONFIG_8xx
	42	#include <asm/8xx_immap.h>
	43	#include <asm/pgtable.h>
b5677d84	44	#include <asm/cpm1.h>
48257c4f PA	45	#endif
	46
	47	#include "fs_enet.h"
5b4b8454	48	#include "fec.h"
48257c4f PA	49
	50	/*************************************************/
	51
	52	#if defined(CONFIG_CPM1)
	53	/* for a CPM1 __raw_xxx's are sufficient */
	54	#define __fs_out32(addr, x) __raw_writel(x, addr)
	55	#define __fs_out16(addr, x) __raw_writew(x, addr)
	56	#define __fs_in32(addr) __raw_readl(addr)
	57	#define __fs_in16(addr) __raw_readw(addr)
	58	#else
	59	/* for others play it safe */
	60	#define __fs_out32(addr, x) out_be32(addr, x)
	61	#define __fs_out16(addr, x) out_be16(addr, x)
	62	#define __fs_in32(addr) in_be32(addr)
	63	#define __fs_in16(addr) in_be16(addr)
	64	#endif
	65
	66	/* write */
	67	#define FW(_fecp, _reg, _v) __fs_out32(&(_fecp)->fec_ ## _reg, (_v))
	68
	69	/* read */
	70	#define FR(_fecp, _reg) __fs_in32(&(_fecp)->fec_ ## _reg)
	71
	72	/* set bits */
	73	#define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) \| (_v))
	74
	75	/* clear bits */
	76	#define FC(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) & ~(_v))
	77
48257c4f	78	/*
5b4b8454	79	* Delay to wait for FEC reset command to complete (in us)
48257c4f PA	80	*/
	81	#define FEC_RESET_DELAY 50
	82
60ab4361	83	static int whack_reset(struct fec __iomem *fecp)
48257c4f PA	84	{
	85	int i;
	86
	87	FW(fecp, ecntrl, FEC_ECNTRL_PINMUX \| FEC_ECNTRL_RESET);
	88	for (i = 0; i < FEC_RESET_DELAY; i++) {
	89	if ((FR(fecp, ecntrl) & FEC_ECNTRL_RESET) == 0)
	90	return 0; /* OK */
	91	udelay(1);
	92	}
	93
	94	return -1;
	95	}
	96
	97	static int do_pd_setup(struct fs_enet_private *fep)
	98	{
2dc11581	99	struct platform_device *ofdev = to_platform_device(fep->dev);
976de6a8	100
f7578496	101	fep->interrupt = irq_of_parse_and_map(ofdev->dev.of_node, 0);
976de6a8 SW	102	if (fep->interrupt == NO_IRQ)
	103	return -EINVAL;
	104
61c7a080	105	fep->fec.fecp = of_iomap(ofdev->dev.of_node, 0);
976de6a8 SW	106	if (!fep->fcc.fccp)
	107	return -EINVAL;
	108
	109	return 0;
48257c4f PA	110	}
	111
	112	#define FEC_NAPI_RX_EVENT_MSK (FEC_ENET_RXF \| FEC_ENET_RXB)
d43a396a	113	#define FEC_NAPI_TX_EVENT_MSK (FEC_ENET_TXF \| FEC_ENET_TXB)
48257c4f PA	114	#define FEC_RX_EVENT (FEC_ENET_RXF)
	115	#define FEC_TX_EVENT (FEC_ENET_TXF)
	116	#define FEC_ERR_EVENT_MSK (FEC_ENET_HBERR \| FEC_ENET_BABR \| \
	117	FEC_ENET_BABT \| FEC_ENET_EBERR)
	118
	119	static int setup_data(struct net_device *dev)
	120	{
	121	struct fs_enet_private *fep = netdev_priv(dev);
	122
	123	if (do_pd_setup(fep) != 0)
	124	return -EINVAL;
	125
	126	fep->fec.hthi = 0;
	127	fep->fec.htlo = 0;
	128
	129	fep->ev_napi_rx = FEC_NAPI_RX_EVENT_MSK;
d43a396a	130	fep->ev_napi_tx = FEC_NAPI_TX_EVENT_MSK;
48257c4f PA	131	fep->ev_rx = FEC_RX_EVENT;
	132	fep->ev_tx = FEC_TX_EVENT;
	133	fep->ev_err = FEC_ERR_EVENT_MSK;
	134
	135	return 0;
	136	}
	137
	138	static int allocate_bd(struct net_device *dev)
	139	{
	140	struct fs_enet_private *fep = netdev_priv(dev);
	141	const struct fs_platform_info *fpi = fep->fpi;
9b8ee8e7	142
31a5bb04	143	fep->ring_base = (void __force __iomem *)dma_alloc_coherent(fep->dev,
48257c4f PA	144	(fpi->tx_ring + fpi->rx_ring) *
	145	sizeof(cbd_t), &fep->ring_mem_addr,
	146	GFP_KERNEL);
	147	if (fep->ring_base == NULL)
	148	return -ENOMEM;
	149
	150	return 0;
	151	}
	152
	153	static void free_bd(struct net_device *dev)
	154	{
	155	struct fs_enet_private *fep = netdev_priv(dev);
	156	const struct fs_platform_info *fpi = fep->fpi;
	157
	158	if(fep->ring_base)
	159	dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring)
	160	* sizeof(cbd_t),
31a5bb04	161	(void __force *)fep->ring_base,
48257c4f PA	162	fep->ring_mem_addr);
	163	}
	164
	165	static void cleanup_data(struct net_device *dev)
	166	{
	167	/* nothing */
	168	}
	169
	170	static void set_promiscuous_mode(struct net_device *dev)
	171	{
	172	struct fs_enet_private *fep = netdev_priv(dev);
60ab4361	173	struct fec __iomem *fecp = fep->fec.fecp;
48257c4f PA	174
	175	FS(fecp, r_cntrl, FEC_RCNTRL_PROM);
	176	}
	177
	178	static void set_multicast_start(struct net_device *dev)
	179	{
	180	struct fs_enet_private *fep = netdev_priv(dev);
	181
	182	fep->fec.hthi = 0;
	183	fep->fec.htlo = 0;
	184	}
	185
	186	static void set_multicast_one(struct net_device dev, const u8 mac)
	187	{
	188	struct fs_enet_private *fep = netdev_priv(dev);
	189	int temp, hash_index, i, j;
	190	u32 crc, csrVal;
	191	u8 byte, msb;
	192
	193	crc = 0xffffffff;
	194	for (i = 0; i < 6; i++) {
	195	byte = mac[i];
	196	for (j = 0; j < 8; j++) {
	197	msb = crc >> 31;
	198	crc <<= 1;
	199	if (msb ^ (byte & 0x1))
	200	crc ^= FEC_CRC_POLY;
	201	byte >>= 1;
	202	}
	203	}
	204
	205	temp = (crc & 0x3f) >> 1;
	206	hash_index = ((temp & 0x01) << 4) \|
	207	((temp & 0x02) << 2) \|
	208	((temp & 0x04)) \|
	209	((temp & 0x08) >> 2) \|
	210	((temp & 0x10) >> 4);
	211	csrVal = 1 << hash_index;
	212	if (crc & 1)
	213	fep->fec.hthi \|= csrVal;
	214	else
	215	fep->fec.htlo \|= csrVal;
	216	}
	217
	218	static void set_multicast_finish(struct net_device *dev)
	219	{
	220	struct fs_enet_private *fep = netdev_priv(dev);
60ab4361	221	struct fec __iomem *fecp = fep->fec.fecp;
48257c4f PA	222
	223	/* if all multi or too many multicasts; just enable all */
	224	if ((dev->flags & IFF_ALLMULTI) != 0 \|\|
4cd24eaf	225	netdev_mc_count(dev) > FEC_MAX_MULTICAST_ADDRS) {
48257c4f PA	226	fep->fec.hthi = 0xffffffffU;
	227	fep->fec.htlo = 0xffffffffU;
	228	}
	229
	230	FC(fecp, r_cntrl, FEC_RCNTRL_PROM);
e2a85aec AG	231	FW(fecp, grp_hash_table_high, fep->fec.hthi);
e2a85aec AG	232	FW(fecp, grp_hash_table_low, fep->fec.htlo);
48257c4f PA	233	}
	234
	235	static void set_multicast_list(struct net_device *dev)
	236	{
22bedad3	237	struct netdev_hw_addr *ha;
48257c4f PA	238
	239	if ((dev->flags & IFF_PROMISC) == 0) {
	240	set_multicast_start(dev);
22bedad3 JP	241	netdev_for_each_mc_addr(ha, dev)
22bedad3 JP	242	set_multicast_one(dev, ha->addr);
48257c4f PA	243	set_multicast_finish(dev);
	244	} else
	245	set_promiscuous_mode(dev);
	246	}
	247
	248	static void restart(struct net_device *dev)
	249	{
48257c4f	250	struct fs_enet_private *fep = netdev_priv(dev);
60ab4361	251	struct fec __iomem *fecp = fep->fec.fecp;
48257c4f PA	252	const struct fs_platform_info *fpi = fep->fpi;
	253	dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
	254	int r;
	255	u32 addrhi, addrlo;
	256
5b4b8454 VB	257	struct mii_bus* mii = fep->phydev->bus;
	258	struct fec_info* fec_inf = mii->priv;
	259
48257c4f PA	260	r = whack_reset(fep->fec.fecp);
48257c4f PA	261	if (r != 0)
fcb6a1c8	262	dev_err(fep->dev, "FEC Reset FAILED!\n");
48257c4f	263	/*
5b4b8454	264	* Set station address.
48257c4f PA	265	*/
	266	addrhi = ((u32) dev->dev_addr[0] << 24) \|
	267	((u32) dev->dev_addr[1] << 16) \|
	268	((u32) dev->dev_addr[2] << 8) \|
	269	(u32) dev->dev_addr[3];
	270	addrlo = ((u32) dev->dev_addr[4] << 24) \|
	271	((u32) dev->dev_addr[5] << 16);
	272	FW(fecp, addr_low, addrhi);
	273	FW(fecp, addr_high, addrlo);
	274
	275	/*
9b8ee8e7	276	* Reset all multicast.
48257c4f	277	*/
e2a85aec AG	278	FW(fecp, grp_hash_table_high, fep->fec.hthi);
e2a85aec AG	279	FW(fecp, grp_hash_table_low, fep->fec.htlo);
48257c4f PA	280
48257c4f PA	281	/*
9b8ee8e7	282	* Set maximum receive buffer size.
48257c4f PA	283	*/
48257c4f PA	284	FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
60ab4361 AG	285	#ifdef CONFIG_FS_ENET_MPC5121_FEC
	286	FW(fecp, r_cntrl, PKT_MAXBUF_SIZE << 16);
	287	#else
48257c4f	288	FW(fecp, r_hash, PKT_MAXBUF_SIZE);
60ab4361	289	#endif
48257c4f PA	290
	291	/* get physical address */
	292	rx_bd_base_phys = fep->ring_mem_addr;
	293	tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
	294
	295	/*
9b8ee8e7	296	* Set receive and transmit descriptor base.
48257c4f PA	297	*/
	298	FW(fecp, r_des_start, rx_bd_base_phys);
	299	FW(fecp, x_des_start, tx_bd_base_phys);
	300
	301	fs_init_bds(dev);
	302
	303	/*
9b8ee8e7	304	* Enable big endian and don't care about SDMA FC.
48257c4f	305	*/
60ab4361 AG	306	#ifdef CONFIG_FS_ENET_MPC5121_FEC
	307	FS(fecp, dma_control, 0xC0000000);
	308	#else
48257c4f	309	FW(fecp, fun_code, 0x78000000);
60ab4361	310	#endif
48257c4f PA	311
48257c4f PA	312	/*
5b4b8454	313	* Set MII speed.
48257c4f	314	*/
5b4b8454	315	FW(fecp, mii_speed, fec_inf->mii_speed);
48257c4f PA	316
48257c4f PA	317	/*
5b4b8454	318	* Clear any outstanding interrupt.
48257c4f PA	319	*/
48257c4f PA	320	FW(fecp, ievent, 0xffc0);
60ab4361	321	#ifndef CONFIG_FS_ENET_MPC5121_FEC
b1f54ba3	322	FW(fecp, ivec, (virq_to_hw(fep->interrupt) / 2) << 29);
48257c4f	323
48257c4f	324	FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
60ab4361 AG	325	#else
60ab4361 AG	326	/*
ba568335	327	* Only set MII/RMII mode - do not touch maximum frame length
60ab4361 AG	328	* configured before.
60ab4361 AG	329	*/
ba568335 VE	330	FS(fecp, r_cntrl, fpi->use_rmii ?
ba568335 VE	331	FEC_RCNTRL_RMII_MODE : FEC_RCNTRL_MII_MODE);
60ab4361	332	#endif
48257c4f	333	/*
5b4b8454	334	* adjust to duplex mode
48257c4f	335	*/
5b4b8454	336	if (fep->phydev->duplex) {
48257c4f PA	337	FC(fecp, r_cntrl, FEC_RCNTRL_DRT);
	338	FS(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD enable */
	339	} else {
	340	FS(fecp, r_cntrl, FEC_RCNTRL_DRT);
	341	FC(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD disable */
	342	}
	343
8751b12c LC	344	/* Restore multicast and promiscuous settings */
	345	set_multicast_list(dev);
	346
48257c4f	347	/*
9b8ee8e7	348	* Enable interrupts we wish to service.
48257c4f PA	349	*/
	350	FW(fecp, imask, FEC_ENET_TXF \| FEC_ENET_TXB \|
	351	FEC_ENET_RXF \| FEC_ENET_RXB);
	352
	353	/*
9b8ee8e7	354	* And last, enable the transmit and receive processing.
48257c4f PA	355	*/
	356	FW(fecp, ecntrl, FEC_ECNTRL_PINMUX \| FEC_ECNTRL_ETHER_EN);
	357	FW(fecp, r_des_active, 0x01000000);
	358	}
	359
	360	static void stop(struct net_device *dev)
	361	{
	362	struct fs_enet_private *fep = netdev_priv(dev);
5b4b8454	363	const struct fs_platform_info *fpi = fep->fpi;
60ab4361	364	struct fec __iomem *fecp = fep->fec.fecp;
5b4b8454 VB	365
	366	struct fec_info* feci= fep->phydev->bus->priv;
	367
48257c4f PA	368	int i;
	369
	370	if ((FR(fecp, ecntrl) & FEC_ECNTRL_ETHER_EN) == 0)
	371	return; /* already down */
	372
	373	FW(fecp, x_cntrl, 0x01); /* Graceful transmit stop */
	374	for (i = 0; ((FR(fecp, ievent) & 0x10000000) == 0) &&
	375	i < FEC_RESET_DELAY; i++)
	376	udelay(1);
	377
	378	if (i == FEC_RESET_DELAY)
fcb6a1c8	379	dev_warn(fep->dev, "FEC timeout on graceful transmit stop\n");
48257c4f	380	/*
9b8ee8e7	381	* Disable FEC. Let only MII interrupts.
48257c4f PA	382	*/
	383	FW(fecp, imask, 0);
	384	FC(fecp, ecntrl, FEC_ECNTRL_ETHER_EN);
	385
	386	fs_cleanup_bds(dev);
	387
	388	/* shut down FEC1? that's where the mii bus is */
5b4b8454	389	if (fpi->has_phy) {
ba568335 VE	390	FS(fecp, r_cntrl, fpi->use_rmii ?
	391	FEC_RCNTRL_RMII_MODE :
	392	FEC_RCNTRL_MII_MODE); /* MII/RMII enable */
48257c4f PA	393	FS(fecp, ecntrl, FEC_ECNTRL_PINMUX \| FEC_ECNTRL_ETHER_EN);
48257c4f PA	394	FW(fecp, ievent, FEC_ENET_MII);
5b4b8454	395	FW(fecp, mii_speed, feci->mii_speed);
48257c4f PA	396	}
	397	}
	398
48257c4f PA	399	static void napi_clear_rx_event(struct net_device *dev)
	400	{
	401	struct fs_enet_private *fep = netdev_priv(dev);
60ab4361	402	struct fec __iomem *fecp = fep->fec.fecp;
48257c4f PA	403
	404	FW(fecp, ievent, FEC_NAPI_RX_EVENT_MSK);
	405	}
	406
	407	static void napi_enable_rx(struct net_device *dev)
	408	{
	409	struct fs_enet_private *fep = netdev_priv(dev);
60ab4361	410	struct fec __iomem *fecp = fep->fec.fecp;
48257c4f PA	411
	412	FS(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
	413	}
	414
	415	static void napi_disable_rx(struct net_device *dev)
	416	{
	417	struct fs_enet_private *fep = netdev_priv(dev);
60ab4361	418	struct fec __iomem *fecp = fep->fec.fecp;
48257c4f PA	419
	420	FC(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
	421	}
	422
d43a396a LC	423	static void napi_clear_tx_event(struct net_device *dev)
	424	{
	425	struct fs_enet_private *fep = netdev_priv(dev);
	426	struct fec __iomem *fecp = fep->fec.fecp;
	427
	428	FW(fecp, ievent, FEC_NAPI_TX_EVENT_MSK);
	429	}
	430
	431	static void napi_enable_tx(struct net_device *dev)
	432	{
	433	struct fs_enet_private *fep = netdev_priv(dev);
	434	struct fec __iomem *fecp = fep->fec.fecp;
	435
	436	FS(fecp, imask, FEC_NAPI_TX_EVENT_MSK);
	437	}
	438
	439	static void napi_disable_tx(struct net_device *dev)
	440	{
	441	struct fs_enet_private *fep = netdev_priv(dev);
	442	struct fec __iomem *fecp = fep->fec.fecp;
	443
	444	FC(fecp, imask, FEC_NAPI_TX_EVENT_MSK);
	445	}
	446
48257c4f PA	447	static void rx_bd_done(struct net_device *dev)
	448	{
	449	struct fs_enet_private *fep = netdev_priv(dev);
60ab4361	450	struct fec __iomem *fecp = fep->fec.fecp;
48257c4f PA	451
	452	FW(fecp, r_des_active, 0x01000000);
	453	}
	454
	455	static void tx_kickstart(struct net_device *dev)
	456	{
	457	struct fs_enet_private *fep = netdev_priv(dev);
60ab4361	458	struct fec __iomem *fecp = fep->fec.fecp;
48257c4f PA	459
	460	FW(fecp, x_des_active, 0x01000000);
	461	}
	462
	463	static u32 get_int_events(struct net_device *dev)
	464	{
	465	struct fs_enet_private *fep = netdev_priv(dev);
60ab4361	466	struct fec __iomem *fecp = fep->fec.fecp;
48257c4f PA	467
	468	return FR(fecp, ievent) & FR(fecp, imask);
	469	}
	470
	471	static void clear_int_events(struct net_device *dev, u32 int_events)
	472	{
	473	struct fs_enet_private *fep = netdev_priv(dev);
60ab4361	474	struct fec __iomem *fecp = fep->fec.fecp;
48257c4f PA	475
	476	FW(fecp, ievent, int_events);
	477	}
	478
	479	static void ev_error(struct net_device *dev, u32 int_events)
	480	{
fcb6a1c8 AG	481	struct fs_enet_private *fep = netdev_priv(dev);
	482
	483	dev_warn(fep->dev, "FEC ERROR(s) 0x%x\n", int_events);
48257c4f PA	484	}
48257c4f PA	485
31a5bb04	486	static int get_regs(struct net_device dev, void p, int *sizep)
48257c4f PA	487	{
	488	struct fs_enet_private *fep = netdev_priv(dev);
	489
60ab4361	490	if (*sizep < sizeof(struct fec))
48257c4f PA	491	return -EINVAL;
48257c4f PA	492
60ab4361	493	memcpy_fromio(p, fep->fec.fecp, sizeof(struct fec));
48257c4f PA	494
	495	return 0;
	496	}
	497
31a5bb04	498	static int get_regs_len(struct net_device *dev)
48257c4f	499	{
60ab4361	500	return sizeof(struct fec);
48257c4f PA	501	}
48257c4f PA	502
31a5bb04	503	static void tx_restart(struct net_device *dev)
48257c4f PA	504	{
	505	/* nothing */
	506	}
	507
	508	/*************************************************************************/
	509
	510	const struct fs_ops fs_fec_ops = {
	511	.setup_data = setup_data,
	512	.cleanup_data = cleanup_data,
	513	.set_multicast_list = set_multicast_list,
	514	.restart = restart,
	515	.stop = stop,
48257c4f PA	516	.napi_clear_rx_event = napi_clear_rx_event,
	517	.napi_enable_rx = napi_enable_rx,
	518	.napi_disable_rx = napi_disable_rx,
d43a396a LC	519	.napi_clear_tx_event = napi_clear_tx_event,
	520	.napi_enable_tx = napi_enable_tx,
	521	.napi_disable_tx = napi_disable_tx,
48257c4f PA	522	.rx_bd_done = rx_bd_done,
	523	.tx_kickstart = tx_kickstart,
	524	.get_int_events = get_int_events,
	525	.clear_int_events = clear_int_events,
	526	.ev_error = ev_error,
	527	.get_regs = get_regs,
	528	.get_regs_len = get_regs_len,
	529	.tx_restart = tx_restart,
	530	.allocate_bd = allocate_bd,
	531	.free_bd = free_bd,
	532	};
	533