tsec.c

最新版的u-boot,2008-10-18发布

/*
 * Freescale Three Speed Ethernet Controller driver
 *
 * This software may be used and distributed according to the
 * terms of the GNU Public License, Version 2, incorporated
 * herein by reference.
 *
 * Copyright 2004, 2007 Freescale Semiconductor, Inc.
 * (C) Copyright 2003, Motorola, Inc.
 * author Andy Fleming
 *
 */

#include <config.h>
#include <common.h>
#include <malloc.h>
#include <net.h>
#include <command.h>
#include <tsec.h>

#include "miiphy.h"

DECLARE_GLOBAL_DATA_PTR;

#define TX_BUF_CNT		2

static uint rxIdx;		/* index of the current RX buffer */
static uint txIdx;		/* index of the current TX buffer */

typedef volatile struct rtxbd {
	txbd8_t txbd[TX_BUF_CNT];
	rxbd8_t rxbd[PKTBUFSRX];
} RTXBD;

#define MAXCONTROLLERS	(8)

static int relocated = 0;

static struct tsec_private *privlist[MAXCONTROLLERS];
static int num_tsecs = 0;

#ifdef __GNUC__
static RTXBD rtx __attribute__ ((aligned(8)));
#else
#error "rtx must be 64-bit aligned"
#endif

static int tsec_send(struct eth_device *dev,
		     volatile void *packet, int length);
static int tsec_recv(struct eth_device *dev);
static int tsec_init(struct eth_device *dev, bd_t * bd);
static void tsec_halt(struct eth_device *dev);
static void init_registers(volatile tsec_t * regs);
static void startup_tsec(struct eth_device *dev);
static int init_phy(struct eth_device *dev);
void write_phy_reg(struct tsec_private *priv, uint regnum, uint value);
uint read_phy_reg(struct tsec_private *priv, uint regnum);
struct phy_info *get_phy_info(struct eth_device *dev);
void phy_run_commands(struct tsec_private *priv, struct phy_cmd *cmd);
static void adjust_link(struct eth_device *dev);
static void relocate_cmds(void);
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) \
	&& !defined(BITBANGMII)
static int tsec_miiphy_write(char *devname, unsigned char addr,
			     unsigned char reg, unsigned short value);
static int tsec_miiphy_read(char *devname, unsigned char addr,
			    unsigned char reg, unsigned short *value);
#endif
#ifdef CONFIG_MCAST_TFTP
static int tsec_mcast_addr (struct eth_device *dev, u8 mcast_mac, u8 set);
#endif

/* Default initializations for TSEC controllers. */

static struct tsec_info_struct tsec_info[] = {
#ifdef CONFIG_TSEC1
	STD_TSEC_INFO(1),	/* TSEC1 */
#endif
#ifdef CONFIG_TSEC2
	STD_TSEC_INFO(2),	/* TSEC2 */
#endif
#ifdef CONFIG_MPC85XX_FEC
	{
		.regs = (tsec_t *)(TSEC_BASE_ADDR + 0x2000),
		.miiregs = (tsec_t *)(TSEC_BASE_ADDR),
		.devname = CONFIG_MPC85XX_FEC_NAME,
		.phyaddr = FEC_PHY_ADDR,
		.flags = FEC_FLAGS
	},			/* FEC */
#endif
#ifdef CONFIG_TSEC3
	STD_TSEC_INFO(3),	/* TSEC3 */
#endif
#ifdef CONFIG_TSEC4
	STD_TSEC_INFO(4),	/* TSEC4 */
#endif
};

int tsec_eth_init(bd_t *bis, struct tsec_info_struct *tsecs, int num)
{
	int i;

	for (i = 0; i < num; i++)
		tsec_initialize(bis, &tsecs[i]);

	return 0;
}

int tsec_standard_init(bd_t *bis)
{
	return tsec_eth_init(bis, tsec_info, ARRAY_SIZE(tsec_info));
}

/* Initialize device structure. Returns success if PHY
 * initialization succeeded (i.e. if it recognizes the PHY)
 */
int tsec_initialize(bd_t * bis, struct tsec_info_struct *tsec_info)
{
	struct eth_device *dev;
	int i;
	struct tsec_private *priv;

	dev = (struct eth_device *)malloc(sizeof *dev);

	if (NULL == dev)
		return 0;

	memset(dev, 0, sizeof *dev);

	priv = (struct tsec_private *)malloc(sizeof(*priv));

	if (NULL == priv)
		return 0;

	privlist[num_tsecs++] = priv;
	priv->regs = tsec_info->regs;
	priv->phyregs = tsec_info->miiregs;

	priv->phyaddr = tsec_info->phyaddr;
	priv->flags = tsec_info->flags;

	sprintf(dev->name, tsec_info->devname);
	dev->iobase = 0;
	dev->priv = priv;
	dev->init = tsec_init;
	dev->halt = tsec_halt;
	dev->send = tsec_send;
	dev->recv = tsec_recv;
#ifdef CONFIG_MCAST_TFTP
	dev->mcast = tsec_mcast_addr;
#endif

	/* Tell u-boot to get the addr from the env */
	for (i = 0; i < 6; i++)
		dev->enetaddr[i] = 0;

	eth_register(dev);

	/* Reset the MAC */
	priv->regs->maccfg1 |= MACCFG1_SOFT_RESET;
	priv->regs->maccfg1 &= ~(MACCFG1_SOFT_RESET);

#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) \
	&& !defined(BITBANGMII)
	miiphy_register(dev->name, tsec_miiphy_read, tsec_miiphy_write);
#endif

	/* Try to initialize PHY here, and return */
	return init_phy(dev);
}

/* Initializes data structures and registers for the controller,
 * and brings the interface up.	 Returns the link status, meaning
 * that it returns success if the link is up, failure otherwise.
 * This allows u-boot to find the first active controller.
 */
int tsec_init(struct eth_device *dev, bd_t * bd)
{
	uint tempval;
	char tmpbuf[MAC_ADDR_LEN];
	int i;
	struct tsec_private *priv = (struct tsec_private *)dev->priv;
	volatile tsec_t *regs = priv->regs;

	/* Make sure the controller is stopped */
	tsec_halt(dev);

	/* Init MACCFG2.  Defaults to GMII */
	regs->maccfg2 = MACCFG2_INIT_SETTINGS;

	/* Init ECNTRL */
	regs->ecntrl = ECNTRL_INIT_SETTINGS;

	/* Copy the station address into the address registers.
	 * Backwards, because little endian MACS are dumb */
	for (i = 0; i < MAC_ADDR_LEN; i++) {
		tmpbuf[MAC_ADDR_LEN - 1 - i] = dev->enetaddr[i];
	}
	regs->macstnaddr1 = *((uint *) (tmpbuf));

	tempval = *((uint *) (tmpbuf + 4));

	regs->macstnaddr2 = tempval;

	/* reset the indices to zero */
	rxIdx = 0;
	txIdx = 0;

	/* Clear out (for the most part) the other registers */
	init_registers(regs);

	/* Ready the device for tx/rx */
	startup_tsec(dev);

	/* If there's no link, fail */
	return (priv->link ? 0 : -1);
}

/* Writes the given phy's reg with value, using the specified MDIO regs */
static void tsec_local_mdio_write(volatile tsec_t *phyregs, uint addr,
		uint reg, uint value)
{
	int timeout = 1000000;

	phyregs->miimadd = (addr << 8) | reg;
	phyregs->miimcon = value;
	asm("sync");

	timeout = 1000000;
	while ((phyregs->miimind & MIIMIND_BUSY) && timeout--) ;
}


/* Provide the default behavior of writing the PHY of this ethernet device */
#define write_phy_reg(priv, regnum, value) tsec_local_mdio_write(priv->phyregs,priv->phyaddr,regnum,value)

/* Reads register regnum on the device's PHY through the
 * specified registers.	 It lowers and raises the read
 * command, and waits for the data to become valid (miimind
 * notvalid bit cleared), and the bus to cease activity (miimind
 * busy bit cleared), and then returns the value
 */
uint tsec_local_mdio_read(volatile tsec_t *phyregs, uint phyid, uint regnum)
{
	uint value;

	/* Put the address of the phy, and the register
	 * number into MIIMADD */
	phyregs->miimadd = (phyid << 8) | regnum;

	/* Clear the command register, and wait */
	phyregs->miimcom = 0;
	asm("sync");

	/* Initiate a read command, and wait */
	phyregs->miimcom = MIIM_READ_COMMAND;
	asm("sync");

	/* Wait for the the indication that the read is done */
	while ((phyregs->miimind & (MIIMIND_NOTVALID | MIIMIND_BUSY))) ;

	/* Grab the value read from the PHY */
	value = phyregs->miimstat;

	return value;
}

/* #define to provide old read_phy_reg functionality without duplicating code */
#define read_phy_reg(priv,regnum) tsec_local_mdio_read(priv->phyregs,priv->phyaddr,regnum)

#define TBIANA_SETTINGS ( \
		TBIANA_ASYMMETRIC_PAUSE \
		| TBIANA_SYMMETRIC_PAUSE \
		| TBIANA_FULL_DUPLEX \
		)

#define TBICR_SETTINGS ( \
		TBICR_PHY_RESET \
		| TBICR_ANEG_ENABLE \
		| TBICR_FULL_DUPLEX \
		| TBICR_SPEED1_SET \
		)
/* Configure the TBI for SGMII operation */
static void tsec_configure_serdes(struct tsec_private *priv)
{
	/* Access TBI PHY registers at given TSEC register offset as opposed to the
	 * register offset used for external PHY accesses */
	tsec_local_mdio_write(priv->regs, priv->regs->tbipa, TBI_ANA,
			TBIANA_SETTINGS);
	tsec_local_mdio_write(priv->regs, priv->regs->tbipa, TBI_TBICON,
			TBICON_CLK_SELECT);
	tsec_local_mdio_write(priv->regs, priv->regs->tbipa, TBI_CR,
			TBICR_SETTINGS);
}

/* Discover which PHY is attached to the device, and configure it
 * properly.  If the PHY is not recognized, then return 0
 * (failure).  Otherwise, return 1
 */
static int init_phy(struct eth_device *dev)
{
	struct tsec_private *priv = (struct tsec_private *)dev->priv;
	struct phy_info *curphy;
	volatile tsec_t *phyregs = priv->phyregs;
	volatile tsec_t *regs = priv->regs;

	/* Assign a Physical address to the TBI */
	regs->tbipa = CFG_TBIPA_VALUE;
	phyregs->tbipa = CFG_TBIPA_VALUE;
	asm("sync");

	/* Reset MII (due to new addresses) */
	priv->phyregs->miimcfg = MIIMCFG_RESET;
	asm("sync");
	priv->phyregs->miimcfg = MIIMCFG_INIT_VALUE;
	asm("sync");
	while (priv->phyregs->miimind & MIIMIND_BUSY) ;

	if (0 == relocated)
		relocate_cmds();

	/* Get the cmd structure corresponding to the attached
	 * PHY */
	curphy = get_phy_info(dev);

	if (curphy == NULL) {
		priv->phyinfo = NULL;
		printf("%s: No PHY found\n", dev->name);

		return 0;
	}

	if (regs->ecntrl & ECNTRL_SGMII_MODE)
		tsec_configure_serdes(priv);

	priv->phyinfo = curphy;

	phy_run_commands(priv, priv->phyinfo->config);

	return 1;
}

/*
 * Returns which value to write to the control register.
 * For 10/100, the value is slightly different
 */
uint mii_cr_init(uint mii_reg, struct tsec_private * priv)
{
	if (priv->flags & TSEC_GIGABIT)
		return MIIM_CONTROL_INIT;
	else
		return MIIM_CR_INIT;
}

/* Parse the status register for link, and then do
 * auto-negotiation
 */
uint mii_parse_sr(uint mii_reg, struct tsec_private * priv)
{
	/*
	 * Wait if the link is up, and autonegotiation is in progress
	 * (ie - we're capable and it's not done)
	 */
	mii_reg = read_phy_reg(priv, MIIM_STATUS);
	if ((mii_reg & MIIM_STATUS_LINK) && (mii_reg & PHY_BMSR_AUTN_ABLE)
	    && !(mii_reg & PHY_BMSR_AUTN_COMP)) {
		int i = 0;

		puts("Waiting for PHY auto negotiation to complete");
		while (!(mii_reg & PHY_BMSR_AUTN_COMP)) {
			/*
			 * Timeout reached ?
			 */
			if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
				puts(" TIMEOUT !\n");
				priv->link = 0;
				return 0;
			}

			if ((i++ % 1000) == 0) {
				putc('.');
			}
			udelay(1000);	/* 1 ms */
			mii_reg = read_phy_reg(priv, MIIM_STATUS);
		}
		puts(" done\n");
		priv->link = 1;
		udelay(500000);	/* another 500 ms (results in faster booting) */
	} else {
		if (mii_reg & MIIM_STATUS_LINK)
			priv->link = 1;
		else
			priv->link = 0;
	}

	return 0;
}

/* Generic function which updates the speed and duplex.  If
 * autonegotiation is enabled, it uses the AND of the link
 * partner's advertised capabilities and our advertised
 * capabilities.  If autonegotiation is disabled, we use the
 * appropriate bits in the control register.
 *
 * Stolen from Linux's mii.c and phy_device.c
 */
uint mii_parse_link(uint mii_reg, struct tsec_private *priv)
{
	/* We're using autonegotiation */
	if (mii_reg & PHY_BMSR_AUTN_ABLE) {
		uint lpa = 0;
		uint gblpa = 0;

		/* Check for gigabit capability */
		if (mii_reg & PHY_BMSR_EXT) {
			/* We want a list of states supported by
			 * both PHYs in the link
			 */
			gblpa = read_phy_reg(priv, PHY_1000BTSR);
			gblpa &= read_phy_reg(priv, PHY_1000BTCR) << 2;
		}

		/* Set the baseline so we only have to set them
		 * if they're different
		 */
		priv->speed = 10;
		priv->duplexity = 0;

		/* Check the gigabit fields */
		if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
			priv->speed = 1000;

			if (gblpa & PHY_1000BTSR_1000FD)
				priv->duplexity = 1;

			/* We're done! */
			return 0;
		}

		lpa = read_phy_reg(priv, PHY_ANAR);
		lpa &= read_phy_reg(priv, PHY_ANLPAR);

		if (lpa & (PHY_ANLPAR_TXFD | PHY_ANLPAR_TX)) {
			priv->speed = 100;

			if (lpa & PHY_ANLPAR_TXFD)
				priv->duplexity = 1;

		} else if (lpa & PHY_ANLPAR_10FD)
			priv->duplexity = 1;
	} else {
		uint bmcr = read_phy_reg(priv, PHY_BMCR);

		priv->speed = 10;
		priv->duplexity = 0;

		if (bmcr & PHY_BMCR_DPLX)
			priv->duplexity = 1;

		if (bmcr & PHY_BMCR_1000_MBPS)
			priv->speed = 1000;
		else if (bmcr & PHY_BMCR_100_MBPS)
			priv->speed = 100;
	}

	return 0;
}

/*
 * Parse the BCM54xx status register for speed and duplex information.
 * The linux sungem_phy has this information, but in a table format.
 */
uint mii_parse_BCM54xx_sr(uint mii_reg, struct tsec_private *priv)
{

	switch((mii_reg & MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK) >> MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT){

		case 1:
			printf("Enet starting in 10BT/HD\n");
			priv->duplexity = 0;
			priv->speed = 10;
			break;

		case 2:
			printf("Enet starting in 10BT/FD\n");
			priv->duplexity = 1;
			priv->speed = 10;
			break;

		case 3:
			printf("Enet starting in 100BT/HD\n");
			priv->duplexity = 0;
			priv->speed = 100;
			break;

		case 5:
			printf("Enet starting in 100BT/FD\n");
			priv->duplexity = 1;
			priv->speed = 100;
			break;

		case 6:
			printf("Enet starting in 1000BT/HD\n");
			priv->duplexity = 0;
			priv->speed = 1000;
			break;

		case 7:
			printf("Enet starting in 1000BT/FD\n");
			priv->duplexity = 1;
			priv->speed = 1000;
			break;

		default:
			printf("Auto-neg error, defaulting to 10BT/HD\n");
			priv->duplexity = 0;
			priv->speed = 10;
			break;
	}

	return 0;

}
/* Parse the 88E1011's status register for speed and duplex
 * information
 */
uint mii_parse_88E1011_psr(uint mii_reg, struct tsec_private * priv)
{
	uint speed;

	mii_reg = read_phy_reg(priv, MIIM_88E1011_PHY_STATUS);

	if ((mii_reg & MIIM_88E1011_PHYSTAT_LINK) &&
		!(mii_reg & MIIM_88E1011_PHYSTAT_SPDDONE)) {
		int i = 0;

		puts("Waiting for PHY realtime link");
		while (!(mii_reg & MIIM_88E1011_PHYSTAT_SPDDONE)) {
			/* Timeout reached ? */
			if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
				puts(" TIMEOUT !\n");
				priv->link = 0;
				break;
			}

			if ((i++ % 1000) == 0) {
				putc('.');
			}
			udelay(1000);	/* 1 ms */
			mii_reg = read_phy_reg(priv, MIIM_88E1011_PHY_STATUS);
		}
		puts(" done\n");
		udelay(500000);	/* another 500 ms (results in faster booting) */
	} else {
		if (mii_reg & MIIM_88E1011_PHYSTAT_LINK)
			priv->link = 1;
		else
			priv->link = 0;
	}

	if (mii_reg & MIIM_88E1011_PHYSTAT_DUPLEX)
		priv->duplexity = 1;
	else
		priv->duplexity = 0;

	speed = (mii_reg & MIIM_88E1011_PHYSTAT_SPEED);

	switch (speed) {
	case MIIM_88E1011_PHYSTAT_GBIT:
		priv->speed = 1000;
		break;
	case MIIM_88E1011_PHYSTAT_100:
		priv->speed = 100;
		break;
	default:
		priv->speed = 10;
	}

	return 0;
}

/* Parse the RTL8211B's status register for speed and duplex
 * information
 */
uint mii_parse_RTL8211B_sr(uint mii_reg, struct tsec_private * priv)
{
	uint speed;

	mii_reg = read_phy_reg(priv, MIIM_RTL8211B_PHY_STATUS);
	if (!(mii_reg & MIIM_RTL8211B_PHYSTAT_SPDDONE)) {
		int i = 0;

		/* in case of timeout ->link is cleared */
		priv->link = 1;
		puts("Waiting for PHY realtime link");
		while (!(mii_reg & MIIM_RTL8211B_PHYSTAT_SPDDONE)) {
			/* Timeout reached ? */
			if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
				puts(" TIMEOUT !\n");
				priv->link = 0;