4xx_enet.c

linux下的BOOT程序原码,有需要的可以来下,保证好用

/*-----------------------------------------------------------------------------+
 *
 *	 This source code has been made available to you by IBM on an AS-IS
 *	 basis.	 Anyone receiving this source is licensed under IBM
 *	 copyrights to use it in any way he or she deems fit, including
 *	 copying it, modifying it, compiling it, and redistributing it either
 *	 with or without modifications.	 No license under IBM patents or
 *	 patent applications is to be implied by the copyright license.
 *
 *	 Any user of this software should understand that IBM cannot provide
 *	 technical support for this software and will not be responsible for
 *	 any consequences resulting from the use of this software.
 *
 *	 Any person who transfers this source code or any derivative work
 *	 must include the IBM copyright notice, this paragraph, and the
 *	 preceding two paragraphs in the transferred software.
 *
 *	 COPYRIGHT   I B M   CORPORATION 1995
 *	 LICENSED MATERIAL  -  PROGRAM PROPERTY OF I B M
 *-----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------+
 *
 *  File Name:	enetemac.c
 *
 *  Function:	Device driver for the ethernet EMAC3 macro on the 405GP.
 *
 *  Author:	Mark Wisner
 *
 *  Change Activity-
 *
 *  Date	Description of Change					    BY
 *  ---------	---------------------					    ---
 *  05-May-99	Created							    MKW
 *  27-Jun-99	Clean up						    JWB
 *  16-Jul-99	Added MAL error recovery and better IP packet handling	    MKW
 *  29-Jul-99	Added Full duplex support				    MKW
 *  06-Aug-99	Changed names for Mal CR reg				    MKW
 *  23-Aug-99	Turned off SYE when running at 10Mbs			    MKW
 *  24-Aug-99	Marked descriptor empty after call_xlc			    MKW
 *  07-Sep-99	Set MAL RX buffer size reg to ENET_MAX_MTU_ALIGNED / 16	    MCG
 *		to avoid chaining maximum sized packets. Push starting
 *		RX descriptor address up to the next cache line boundary.
 *  16-Jan-00	Added support for booting with IP of 0x0		    MKW
 *  15-Mar-00	Updated enetInit() to enable broadcast addresses in the
 *		EMAC_RXM register.					    JWB
 *  12-Mar-01	[e-mail]
 *		 - Variables are compatible with those already defined in
 *		  include/net.h
 *		- Receive buffer descriptor ring is used to send buffers
 *		  to the user
 *		- Info print about send/received/handled packet number if
 *		  INFO_405_ENET is set
 *  17-Apr-01	[e-mail]
 *		- MAL reset in "eth_halt" included
 *		- Enet speed and duplex output now in one line
 *  08-May-01	[e-mail]
 *		- MAL error handling added (eth_init called again)
 *  13-Nov-01	[e-mail]
 *		- Set IST bit in EMAC_M1 reg upon 100MBit or full duplex
 *  04-Jan-02	[e-mail]
 *		- Wait for PHY auto negotiation to complete added
 *  06-Feb-02	[e-mail]
 *		- Bug fixed in waiting for auto negotiation to complete
 *  26-Feb-02	[e-mail]
 *		- rx and tx buffer descriptors now allocated (no fixed address
 *		  used anymore)
 *  17-Jun-02	[e-mail]
 *		- MAL error debug printf 'M' removed (rx de interrupt may
 *		  occur upon many incoming packets with only 4 rx buffers).
 *-----------------------------------------------------------------------------*
 *  17-Nov-03	[e-mail]
 *		- ported from 405gp_enet.c to utilized upto 4 EMAC ports
 *		  in the 440GX.	 This port should work with the 440GP
 *		  (2 EMACs) also
 *  15-Aug-05	[e-mail]
 *		- merged 405gp_enet.c and 440gx_enet.c to generic 4xx_enet.c
		  now handling all 4xx cpu's.
 *-----------------------------------------------------------------------------*/

#include <config.h>
#include <common.h>
#include <net.h>
#include <asm/processor.h>
#include <commproc.h>
#include <ppc4xx.h>
#include <ppc4xx_enet.h>
#include <405_mal.h>
#include <miiphy.h>
#include <malloc.h>
#include "vecnum.h"

/*
 * Only compile for platform with AMCC EMAC ethernet controller and
 * network support enabled.
 * Remark: CONFIG_405 describes Xilinx PPC405 FPGA without EMAC controller!
 */
#if (CONFIG_COMMANDS & CFG_CMD_NET) && !defined(CONFIG_405) && !defined(CONFIG_IOP480)

#if !(defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII))
#error "CONFIG_MII has to be defined!"
#endif

#if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_NET_MULTI)
#error "CONFIG_NET_MULTI has to be defined for NetConsole"
#endif

#define EMAC_RESET_TIMEOUT 1000 /* 1000 ms reset timeout */
#define PHY_AUTONEGOTIATE_TIMEOUT 4000	/* 4000 ms autonegotiate timeout */

/* Ethernet Transmit and Receive Buffers */
/* AS.HARNOIS
 * In the same way ENET_MAX_MTU and ENET_MAX_MTU_ALIGNED are set from
 * PKTSIZE and PKTSIZE_ALIGN (include/net.h)
 */
#define ENET_MAX_MTU	       PKTSIZE
#define ENET_MAX_MTU_ALIGNED   PKTSIZE_ALIGN

/*-----------------------------------------------------------------------------+
 * Defines for MAL/EMAC interrupt conditions as reported in the UIC (Universal
 * Interrupt Controller).
 *-----------------------------------------------------------------------------*/
#define MAL_UIC_ERR ( UIC_MAL_SERR | UIC_MAL_TXDE  | UIC_MAL_RXDE)
#define MAL_UIC_DEF  (UIC_MAL_RXEOB | MAL_UIC_ERR)
#define EMAC_UIC_DEF UIC_ENET
#define EMAC_UIC_DEF1 UIC_ENET1
#define SEL_UIC_DEF(p) (p ? UIC_ENET1 : UIC_ENET )

#undef INFO_4XX_ENET

#define BI_PHYMODE_NONE	 0
#define BI_PHYMODE_ZMII	 1
#define BI_PHYMODE_RGMII 2


/*-----------------------------------------------------------------------------+
 * Global variables. TX and RX descriptors and buffers.
 *-----------------------------------------------------------------------------*/
/* IER globals */
static uint32_t mal_ier;

#if !defined(CONFIG_NET_MULTI)
struct eth_device *emac0_dev = NULL;
#endif

/*
 * Get count of EMAC devices (doesn't have to be the max. possible number
 * supported by the cpu)
 */
#if defined(CONFIG_HAS_ETH3)
#define LAST_EMAC_NUM	4
#elif defined(CONFIG_HAS_ETH2)
#define LAST_EMAC_NUM	3
#elif defined(CONFIG_HAS_ETH1)
#define LAST_EMAC_NUM	2
#else
#define LAST_EMAC_NUM	1
#endif

/*-----------------------------------------------------------------------------+
 * Prototypes and externals.
 *-----------------------------------------------------------------------------*/
static void enet_rcv (struct eth_device *dev, unsigned long malisr);

int enetInt (struct eth_device *dev);
static void mal_err (struct eth_device *dev, unsigned long isr,
		     unsigned long uic, unsigned long maldef,
		     unsigned long mal_errr);
static void emac_err (struct eth_device *dev, unsigned long isr);

extern int phy_setup_aneg (char *devname, unsigned char addr);
extern int emac4xx_miiphy_read (char *devname, unsigned char addr,
		unsigned char reg, unsigned short *value);
extern int emac4xx_miiphy_write (char *devname, unsigned char addr,
		unsigned char reg, unsigned short value);

/*-----------------------------------------------------------------------------+
| ppc_4xx_eth_halt
| Disable MAL channel, and EMACn
+-----------------------------------------------------------------------------*/
static void ppc_4xx_eth_halt (struct eth_device *dev)
{
	EMAC_4XX_HW_PST hw_p = dev->priv;
	uint32_t failsafe = 10000;

	out32 (EMAC_IER + hw_p->hw_addr, 0x00000000);	/* disable emac interrupts */

	/* 1st reset MAL channel */
	/* Note: writing a 0 to a channel has no effect */
#if defined(CONFIG_405EP) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
	mtdcr (maltxcarr, (MAL_CR_MMSR >> (hw_p->devnum * 2)));
#else
	mtdcr (maltxcarr, (MAL_CR_MMSR >> hw_p->devnum));
#endif
	mtdcr (malrxcarr, (MAL_CR_MMSR >> hw_p->devnum));

	/* wait for reset */
	while (mfdcr (malrxcasr) & (MAL_CR_MMSR >> hw_p->devnum)) {
		udelay (1000);	/* Delay 1 MS so as not to hammer the register */
		failsafe--;
		if (failsafe == 0)
			break;
	}

	/* EMAC RESET */
	out32 (EMAC_M0 + hw_p->hw_addr, EMAC_M0_SRST);

#ifndef CONFIG_NETCONSOLE
	hw_p->print_speed = 1;	/* print speed message again next time */
#endif

	return;
}

#if defined (CONFIG_440GX)
int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
{
	unsigned long pfc1;
	unsigned long zmiifer;
	unsigned long rmiifer;

	mfsdr(sdr_pfc1, pfc1);
	pfc1 = SDR0_PFC1_EPS_DECODE(pfc1);

	zmiifer = 0;
	rmiifer = 0;

	switch (pfc1) {
	case 1:
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(1);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(2);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_ZMII;
		break;
	case 2:
		zmiifer = ZMII_FER_SMII << ZMII_FER_V(0);
		zmiifer = ZMII_FER_SMII << ZMII_FER_V(1);
		zmiifer = ZMII_FER_SMII << ZMII_FER_V(2);
		zmiifer = ZMII_FER_SMII << ZMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_ZMII;
		break;
	case 3:
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(0);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(2);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		bis->bi_phymode[2] = BI_PHYMODE_RGMII;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	case 4:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(1);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V (2);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V (3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_RGMII;
		bis->bi_phymode[3] = BI_PHYMODE_RGMII;
		break;
	case 5:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (1);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (2);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_RGMII;
		break;
	case 6:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (1);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(2);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_RGMII;
		break;
	case 0:
	default:
		zmiifer = ZMII_FER_MII << ZMII_FER_V(devnum);
		rmiifer = 0x0;
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_ZMII;
		break;
	}

	/* Ensure we setup mdio for this devnum and ONLY this devnum */
	zmiifer |= (ZMII_FER_MDI) << ZMII_FER_V(devnum);

	out32 (ZMII_FER, zmiifer);
	out32 (RGMII_FER, rmiifer);

	return ((int)pfc1);

}
#endif

static int ppc_4xx_eth_init (struct eth_device *dev, bd_t * bis)
{
	int i, j;
	unsigned long reg = 0;
	unsigned long msr;
	unsigned long speed;
	unsigned long duplex;
	unsigned long failsafe;
	unsigned mode_reg;
	unsigned short devnum;
	unsigned short reg_short;
#if defined(CONFIG_440GX) || defined(CONFIG_440SP)
	sys_info_t sysinfo;
#if defined(CONFIG_440GX)
	int ethgroup = -1;
#endif
#endif

	EMAC_4XX_HW_PST hw_p = dev->priv;

	/* before doing anything, figure out if we have a MAC address */
	/* if not, bail */
	if (memcmp (dev->enetaddr, "\0\0\0\0\0\0", 6) == 0) {
		printf("ERROR: ethaddr not set!\n");
		return -1;
	}

#if defined(CONFIG_440GX) || defined(CONFIG_440SP)
	/* Need to get the OPB frequency so we can access the PHY */
	get_sys_info (&sysinfo);
#endif

	msr = mfmsr ();
	mtmsr (msr & ~(MSR_EE));	/* disable interrupts */

	devnum = hw_p->devnum;

#ifdef INFO_4XX_ENET
	/* AS.HARNOIS
	 * We should have :
	 * hw_p->stats.pkts_handled <=	hw_p->stats.pkts_rx <= hw_p->stats.pkts_handled+PKTBUFSRX
	 * In the most cases hw_p->stats.pkts_handled = hw_p->stats.pkts_rx, but it
	 * is possible that new packets (without relationship with
	 * current transfer) have got the time to arrived before
	 * netloop calls eth_halt
	 */
	printf ("About preceeding transfer (eth%d):\n"
		"- Sent packet number %d\n"
		"- Received packet number %d\n"
		"- Handled packet number %d\n",
		hw_p->devnum,
		hw_p->stats.pkts_tx,
		hw_p->stats.pkts_rx, hw_p->stats.pkts_handled);

	hw_p->stats.pkts_tx = 0;
	hw_p->stats.pkts_rx = 0;
	hw_p->stats.pkts_handled = 0;
#endif

	hw_p->tx_err_index = 0; /* Transmit Error Index for tx_err_log */
	hw_p->rx_err_index = 0; /* Receive Error Index for rx_err_log */

	hw_p->rx_slot = 0;	/* MAL Receive Slot */
	hw_p->rx_i_index = 0;	/* Receive Interrupt Queue Index */
	hw_p->rx_u_index = 0;	/* Receive User Queue Index */

	hw_p->tx_slot = 0;	/* MAL Transmit Slot */
	hw_p->tx_i_index = 0;	/* Transmit Interrupt Queue Index */
	hw_p->tx_u_index = 0;	/* Transmit User Queue Index */

#if defined(CONFIG_440) && !defined(CONFIG_440SP)
	/* set RMII mode */
	/* NOTE: 440GX spec states that mode is mutually exclusive */
	/* NOTE: Therefore, disable all other EMACS, since we handle */
	/* NOTE: only one emac at a time */
	reg = 0;
	out32 (ZMII_FER, 0);
	udelay (100);

#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
	out32 (ZMII_FER, (ZMII_FER_RMII | ZMII_FER_MDI) << ZMII_FER_V (devnum));
#elif defined(CONFIG_440GX)
	ethgroup = ppc_4xx_eth_setup_bridge(devnum, bis);
#elif defined(CONFIG_440GP)
	/* set RMII mode */
	out32 (ZMII_FER, ZMII_RMII | ZMII_MDI0);
#else
	if ((devnum == 0) || (devnum == 1)) {
		out32 (ZMII_FER, (ZMII_FER_SMII | ZMII_FER_MDI) << ZMII_FER_V (devnum));
	}
	else { /* ((devnum == 2) || (devnum == 3)) */
		out32 (ZMII_FER, ZMII_FER_MDI << ZMII_FER_V (devnum));
		out32 (RGMII_FER, ((RGMII_FER_RGMII << RGMII_FER_V (2)) |
				   (RGMII_FER_RGMII << RGMII_FER_V (3))));
	}
#endif

	out32 (ZMII_SSR, ZMII_SSR_SP << ZMII_SSR_V(devnum));
#endif /* defined(CONFIG_440) && !defined(CONFIG_440SP) */

	__asm__ volatile ("eieio");

	/* reset emac so we have access to the phy */

	out32 (EMAC_M0 + hw_p->hw_addr, EMAC_M0_SRST);
	__asm__ volatile ("eieio");

	failsafe = 1000;
	while ((in32 (EMAC_M0 + hw_p->hw_addr) & (EMAC_M0_SRST)) && failsafe) {
		udelay (1000);
		failsafe--;
	}

#if defined(CONFIG_440GX) || defined(CONFIG_440SP)
	/* Whack the M1 register */
	mode_reg = 0x0;
	mode_reg &= ~0x00000038;
	if (sysinfo.freqOPB <= 50000000);
	else if (sysinfo.freqOPB <= 66666667)
		mode_reg |= EMAC_M1_OBCI_66;
	else if (sysinfo.freqOPB <= 83333333)
		mode_reg |= EMAC_M1_OBCI_83;
	else if (sysinfo.freqOPB <= 100000000)
		mode_reg |= EMAC_M1_OBCI_100;
	else
		mode_reg |= EMAC_M1_OBCI_GT100;

	out32 (EMAC_M1 + hw_p->hw_addr, mode_reg);
#endif /* defined(CONFIG_440GX) || defined(CONFIG_440SP) */

	/* wait for PHY to complete auto negotiation */
	reg_short = 0;
#ifndef CONFIG_CS8952_PHY
	switch (devnum) {
	case 0:
		reg = CONFIG_PHY_ADDR;
		break;
#if defined (CONFIG_PHY1_ADDR)
	case 1:
		reg = CONFIG_PHY1_ADDR;
		break;
#endif
#if defined (CONFIG_440GX)
	case 2:
		reg = CONFIG_PHY2_ADDR;
		break;
	case 3:
		reg = CONFIG_PHY3_ADDR;
		break;
#endif
	default:
		reg = CONFIG_PHY_ADDR;
		break;
	}

	bis->bi_phynum[devnum] = reg;

#if defined(CONFIG_PHY_RESET)
	/*
	 * Reset the phy, only if its the first time through
	 * otherwise, just check the speeds & feeds
	 */
	if (hw_p->first_init == 0) {
		miiphy_reset (dev->name, reg);

#if defined(CONFIG_440GX) || defined(CONFIG_440SP)
#if defined(CONFIG_CIS8201_PHY)
		/*
		 * Cicada 8201 PHY needs to have an extended register whacked
		 * for RGMII mode.
		 */
		if ( ((devnum == 2) || (devnum ==3)) && (4 == ethgroup) ) {
#if defined(CONFIG_CIS8201_SHORT_ETCH)
			miiphy_write (dev->name, reg, 23, 0x1300);
#else
			miiphy_write (dev->name, reg, 23, 0x1000);
#endif
			/*
			 * Vitesse VSC8201/Cicada CIS8201 errata:
			 * Interoperability problem with Intel 82547EI phys
			 * This work around (provided by Vitesse) changes
			 * the default timer convergence from 8ms to 12ms
			 */
			miiphy_write (dev->name, reg, 0x1f, 0x2a30);
			miiphy_write (dev->name, reg, 0x08, 0x0200);
			miiphy_write (dev->name, reg, 0x1f, 0x52b5);
			miiphy_write (dev->name, reg, 0x02, 0x0004);
			miiphy_write (dev->name, reg, 0x01, 0x0671);
			miiphy_write (dev->name, reg, 0x00, 0x8fae);
			miiphy_write (dev->name, reg, 0x1f, 0x2a30);
			miiphy_write (dev->name, reg, 0x08, 0x0000);
			miiphy_write (dev->name, reg, 0x1f, 0x0000);
			/* end Vitesse/Cicada errata */
		}
#endif
#endif
		/* Start/Restart autonegotiation */
		phy_setup_aneg (dev->name, reg);
		udelay (1000);
	}
#endif /* defined(CONFIG_PHY_RESET) */

	miiphy_read (dev->name, reg, PHY_BMSR, &reg_short);

	/*
	 * Wait if PHY is capable of autonegotiation and autonegotiation is not complete
	 */
	if ((reg_short & PHY_BMSR_AUTN_ABLE)
	    && !(reg_short & PHY_BMSR_AUTN_COMP)) {
		puts ("Waiting for PHY auto negotiation to complete");
		i = 0;
		while (!(reg_short & PHY_BMSR_AUTN_COMP)) {
			/*
			 * Timeout reached ?
			 */
			if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
				puts (" TIMEOUT !\n");