dm9000x.c

上一次项目的vivi 代码

/*
  dm9000.c: Version 1.2 12/15/2003

	A Davicom DM9000 ISA NIC fast Ethernet driver for Linux.
	Copyright (C) 1997  Sten Wang

	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.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

  (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.

V0.11	06/20/2001	REG_0A bit3=1, default enable BP with DA match
	06/22/2001 	Support DM9801 progrmming
	 	 	E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
		 	E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
     		R17 = (R17 & 0xfff0) | NF + 3
		 	E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
     		R17 = (R17 & 0xfff0) | NF

v1.00               	modify by simon 2001.9.5
	                change for kernel 2.4.x

v1.1   11/09/2001      	fix force mode bug

v1.2   03/18/2003       Weilun Huang <[e-mail]>:
			Fixed phy reset.
			Added tx/rx 32 bit mode.
			Cleaned up for kernel merge.

--------------------------------------

       12/15/2003       Initial port to u-boot by Sascha Hauer <[e-mail]>

TODO: Homerun NIC and longrun NIC are not functional, only internal at the
      moment.
*/

//#include <common.h>
#include "config.h"
#include <types.h>
#include <command.h>
#include <net.h>
#include <time.h>
#include <printk.h>
//#include <asm/io.h>

#ifdef CONFIG_DRIVER_DM9000

#include "dm9000x.h"

/* Board/System/Debug information/definition ---------------- */

#define DM9801_NOISE_FLOOR	0x08
#define DM9802_NOISE_FLOOR	0x05

/* #define CONFIG_DM9000_DEBUG */

//#define DM9000_DBG_T(fmt,args...) printk(__FUNCTION__"(): " fmt ,##args)
//#define DM9000_DBG_D(fmt,args...) printk(fmt ,##args)
#define DM9000_DBG_T(fmt,args...)
#define DM9000_DBG_D(fmt,args...)
#ifdef CONFIG_DM9000_DEBUG
#define DM9000_DBG(fmt,args...) printk(__FUNCTION__"(): " fmt ,##args)
#else				/*  */
#define DM9000_DBG(fmt,args...)
#endif				/*  */
enum DM9000_PHY_mode { DM9000_10MHD = 0, DM9000_100MHD =
	    1, DM9000_10MFD = 4, DM9000_100MFD = 5, DM9000_AUTO =
	    8, DM9000_1M_HPNA = 0x10
};
enum DM9000_NIC_TYPE { FASTETHER_NIC = 0, HOMERUN_NIC = 1, LONGRUN_NIC = 2
};

/* Structure/enum declaration ------------------------------- */
typedef struct board_info {
	u32 runt_length_counter;	/* counter: RX length < 64byte */
	u32 long_length_counter;	/* counter: RX length > 1514byte */
	u32 reset_counter;	/* counter: RESET */
	u32 reset_tx_timeout;	/* RESET caused by TX Timeout */
	u32 reset_rx_status;	/* RESET caused by RX Statsus wrong */
	u16 tx_pkt_cnt;
	u16 queue_start_addr;
	u16 dbug_cnt;
	u8 phy_addr;
	u8 device_wait_reset;	/* device state */
	u8 nic_type;		/* NIC type */
	unsigned char srom[128];
} board_info_t;
board_info_t dmfe_info;

/* For module input parameter */
static int media_mode = DM9000_AUTO;
//static u8 nfloor = 0;

/* function declaration ------------------------------------- */
int eth_init(bd_t * bd);
int eth_send(volatile void *, int);
int eth_rx(void);
void eth_halt(void);
static int dm9000_probe(void);
static u16 phy_read(int);
static void phy_write(int, u16);
//static u16 read_srom_word(int);
static u8 DM9000_ior(int);
static void DM9000_iow(int reg, u8 value);

/* DM9000 network board routine ---------------------------- */

#define DM9000_outb(d,r) ( *(volatile u8 *)r = d )
#define DM9000_outw(d,r) ( *(volatile u16 *)r = d )
#define DM9000_outl(d,r) ( *(volatile u32 *)r = d )
#define DM9000_inb(r) (*(volatile u8 *)r)
#define DM9000_inw(r) (*(volatile u16 *)r)
#define DM9000_inl(r) (*(volatile u32 *)r)


#ifdef CONFIG_DM9000_DEBUG
static void
dump_regs(void)
{
	DM9000_DBG("\n");
	DM9000_DBG("NCR   (0x00): %02x\n", DM9000_ior(0));
	DM9000_DBG("NSR   (0x01): %02x\n", DM9000_ior(1));
	DM9000_DBG("TCR   (0x02): %02x\n", DM9000_ior(2));
	DM9000_DBG("TSRI  (0x03): %02x\n", DM9000_ior(3));
	DM9000_DBG("TSRII (0x04): %02x\n", DM9000_ior(4));
	DM9000_DBG("RCR   (0x05): %02x\n", DM9000_ior(5));
	DM9000_DBG("RSR   (0x06): %02x\n", DM9000_ior(6));
	DM9000_DBG("ISR   (0xFE): %02x\n", DM9000_ior(DM9000_ISR));
	DM9000_DBG("\n");
}
#endif				/*  */

/*
  Search DM9000 board, allocate space and register it
*/
int
dm9000_probe(void)
{
	u32 id_val;
	id_val = DM9000_ior(DM9000_VIDL);
	id_val |= DM9000_ior(DM9000_VIDH) << 8;
	id_val |= DM9000_ior(DM9000_PIDL) << 16;
	id_val |= DM9000_ior(DM9000_PIDH) << 24;
	if (id_val == DM9000_ID) {
		printk("dm9000 i/o: 0x%x, id: 0x%x \n", CONFIG_DM9000_BASE,
		       id_val);
		return 0;
	} else {
		printk("dm9000 not found at 0x%08x id: 0x%08x\n",
		       CONFIG_DM9000_BASE, id_val);
		return -1;
	}
}

/* Set PHY operationg mode
*/
static void
set_PHY_mode(void)
{
	u16 phy_reg4 = 0x01e1, phy_reg0 = 0x1200;
	if (!(media_mode & DM9000_AUTO)) {
		switch (media_mode) {
		case DM9000_10MHD:
			phy_reg4 = 0x21;
			phy_reg0 = 0x1000;
			break;
		case DM9000_10MFD:
			phy_reg4 = 0x41;
			phy_reg0 = 0x1100;
			break;
		case DM9000_100MHD:
			phy_reg4 = 0x81;
			phy_reg0 = 0x3000;
			break;
		case DM9000_100MFD:
			phy_reg4 = 0x101;
			phy_reg0 = 0x3100;
			break;
		}
		
	}
	phy_write(0, phy_reg0);	/*  Tmp */
	phy_write(4, phy_reg4);	/* Set PHY media mode */
		
	//DM9000_iow(DM9000_GPCR, 0x01);	/* Let GPIO0 output */
	//DM9000_iow(DM9000_GPR, 0x00);	/* Enable PHY */
}

/* General Purpose dm9000 reset routine */
static void
dm9000_reset(void)
{
	DM9000_DBG("resetting\n");
	/* set the internal PHY power-on, GPIOs normal, and wait 2ms */
	DM9000_iow(DM9000_GPR, 1); 	/* Power-Down PHY */
	udelay(500);
	DM9000_iow(DM9000_GPR, 0);	/* GPR (reg_1Fh)bit GPIO0=0 pre-activate PHY */
	udelay(2000);		/* wait 2ms for PHY power-on ready */
	//DM9000_iow(DM9000_NCR, NCR_RST);
	DM9000_iow(DM9000_NCR, 3);
	udelay(20);		/* delay 20us */
	//DM9000_iow(DM9000_NCR, NCR_RST);
	DM9000_iow(DM9000_NCR, 3);
	udelay(1000);		/* delay 1ms */
}

/* Initilize dm9000 board
*/
int
eth_init(bd_t * bd)
{
	int i, oft, lnk;
	DM9000_DBG("eth_init()\n");

	dm9000_probe();
	/* RESET device */
	dm9000_reset();

	/* NIC Type: FASTETHER, HOMERUN, LONGRUN */
	//identify_nic();

	/* GPIO0 on pre-activate PHY */
	//DM9000_iow(DM9000_GPR, 0x00);	/*REG_1F bit0 activate phyxcer */

	/* Set PHY */
	media_mode = DM9000_AUTO;
	set_PHY_mode();

	/* Program operating register */
	DM9000_iow(DM9000_NCR, 0x0);	/* only intern phy supported by now */
	DM9000_iow(DM9000_TCR, 0);	/* TX Polling clear */
	DM9000_iow(DM9000_BPTR, 0x3f);	/* Less 3Kb, 200us */
	//DM9000_iow(DM9000_FCTR, FCTR_HWOT(3) | FCTR_LWOT(8));	/* Flow Control : High/Low Water */
	//DM9000_iow(DM9000_FCR, 0x0);	/* SH FIXME: This looks strange! Flow Control */
	DM9000_iow(DM9000_SMCR, 0);	/* Special Mode */
	DM9000_iow(DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);	/* clear TX status */
	DM9000_iow(DM9000_ISR, 0x0f);	/* Clear interrupt status */

	/* Set Node address */
	//for (i = 0; i < 6; i++)
	//	((u16 *) bd->bi_enetaddr)[i] = read_srom_word(i);
	
	/*printk*/DM9000_DBG("MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", bd->bi_enetaddr[0],
	       bd->bi_enetaddr[1], bd->bi_enetaddr[2], bd->bi_enetaddr[3],
	       bd->bi_enetaddr[4], bd->bi_enetaddr[5]);
	for (i = 0, oft = 0x10; i < 6; i++)
		DM9000_iow(oft++, bd->bi_enetaddr[i]);
	for (i = 0; i < 7; i++)
		DM9000_iow(oft++, 0xff);//DM9000_iow(oft++, 0x00);
	//DM9000_iow(oft, 0x80);

	/* read back mac, just to be sure */
	//for (i = 0, oft = 0x10; i < 6; i++, oft++)
	//	DM9000_DBG("%02x:", DM9000_ior(oft));
	//DM9000_DBG("\n");

	/* Activate DM9000 */
	DM9000_iow(DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);	/* RX enable */
	//DM9000_iow(DM9000_IMR, IMR_PAR);	/* Enable TX/RX interrupt mask */
	DM9000_iow(DM9000_IMR, 0xA3);
	i = 0;
	while (!(phy_read(1) & 0x20)) {	/* autonegation complete bit */
		udelay(1000);
		i++;
		if (i >= 10000) {
			printk("could not establish link\n");
			return -1;
		}
	}

	/* see what we've got */
	lnk = phy_read(17) >> 12;
	printk("operating at ");
	switch (lnk) {
	case 1:
		printk("10M half duplex ");
		break;
	case 2:
		printk("10M full duplex ");
		break;
	case 4:
		printk("100M half duplex ");
		break;
	case 8:
		printk("100M full duplex ");
		break;
	default:
		printk("unknown: %d ", lnk);
		break;
	}
	printk("mode\n");
	return 0;
}

/*
  Hardware start transmission.
  Send a packet to media from the upper layer.
*/
int
eth_send(volatile void *packet, int length)
{
	char *data_ptr;
	u32 tmplen, i;
	int tmo;


	/* Move data to DM9000 TX RAM */
	data_ptr = (char *) packet;
	DM9000_outb(DM9000_MWCMD, DM9000_IO);

#ifdef CONFIG_DM9000_USE_8BIT
	/* Byte mode */
	for (i = 0; i < length; i++)
		DM9000_outb((data_ptr[i] & 0xff), DM9000_DATA);

#endif				/*  */
#ifdef CONFIG_DM9000_USE_16BIT
	tmplen = (length + 1) / 2;
	for (i = 0; i < tmplen; i++)
		DM9000_outw(((u16 *) data_ptr)[i], DM9000_DATA);

#endif				/*  */
#ifdef CONFIG_DM9000_USE_32BIT
	tmplen = (length + 3) / 4;
	for (i = 0; i < tmplen; i++)
		DM9000_outl(((u32 *) data_ptr)[i], DM9000_DATA);

#endif				/*  */

	/* Set TX length to DM9000 */
	DM9000_iow(DM9000_TXPLH, (length >> 8) & 0xff);
	DM9000_iow(DM9000_TXPLL, length & 0xff);

	/* Issue TX polling command */
	DM9000_iow(DM9000_TCR, TCR_TXREQ);	/* Cleared after TX complete */

	/* wait for end of transmission */
	tmo = get_timer(0) + 5 * CFG_HZ;
	while (DM9000_ior(DM9000_TCR) & TCR_TXREQ) {
		if (get_timer(0) >= tmo) {
			printk("transmission timeout\n");
			break;
		}
	}
	DM9000_DBG("transmit done\n\n");
	return 0;
}

/*
  Stop the interface.
  The interface is stopped when it is brought.
*/
void
eth_halt(void)
{
	DM9000_DBG_T("eth_halt\n");

	/* RESET devie */
	phy_write(0, 0x8000);	/* PHY RESET */
	DM9000_iow(DM9000_GPR, 0x01);	/* Power-Down PHY */
	DM9000_iow(DM9000_IMR, 0x80);	/* Disable all interrupt */
	DM9000_iow(DM9000_RCR, 0x00);	/* Disable RX */
}

/*
  Received a packet and pass to upper layer
*/
int
eth_rx(void)
{
	u8 rxbyte, *rdptr = (u8 *) NetRxPackets[0];
	u16 RxStatus, RxLen = 0;
	u32 tmplen, i;

	while(1) {
    	/* Check packet ready or not */
    	DM9000_ior(DM9000_MRCMDX);	/* Dummy read */
    	//rxbyte = DM9000_inb(DM9000_DATA);	/* Got most updated data */
    	DM9000_ior(DM9000_MRRH); 
		DM9000_ior(DM9000_MRRL); 
    	rxbyte = DM9000_ior(DM9000_MRCMDX);
    	if (rxbyte == 0) {
    		return 0;
    	}
    	//if (rxbyte != 1)
    	//	break;
    
    	/* Status check: this byte must be 0 or 1 */
    	if (rxbyte > 1) {
    		DM9000_iow(DM9000_RCR, 0x00);	/* Stop Device */
    		DM9000_iow(DM9000_ISR, 0x80);	/* Stop INT request */
    		printk ("rx status check: %d\n", rxbyte);
    	}
    	//DM9000_DBG("receiving packet\n");
    
    	/* A packet ready now  & Get status/length */
    	DM9000_outb(DM9000_MRCMD, DM9000_IO);
    
    #ifdef CONFIG_DM9000_USE_8BIT
    	RxStatus = DM9000_inb(DM9000_DATA) + (DM9000_inb(DM9000_DATA) << 8);
    	RxLen = DM9000_inb(DM9000_DATA) + (DM9000_inb(DM9000_DATA) << 8);
    
    #endif				/*  */
    #ifdef CONFIG_DM9000_USE_16BIT
    	RxStatus = DM9000_inw(DM9000_DATA);
    	RxLen = DM9000_inw(DM9000_DATA);
    
    #endif				/*  */
    #ifdef CONFIG_DM9000_USE_32BIT
    	tmpdata = DM9000_inl(DM9000_DATA);
    	RxStatus = tmpdata;
    	RxLen = tmpdata >> 16;
    
    #endif				/*  */
    	//DM9000_DBG("rx status: 0x%04x rx len: %d\n", RxStatus, RxLen);
    
    	/* Move data from DM9000 */
    	/* Read received packet from RX SRAM */
    #ifdef CONFIG_DM9000_USE_8BIT
    	for (i = 0; i < RxLen; i++)
    		rdptr[i] = DM9000_inb(DM9000_DATA);
    
    #endif				/*  */
    #ifdef CONFIG_DM9000_USE_16BIT
    	tmplen = (RxLen + 1) / 2;
    	for (i = 0; i < tmplen; i++)
    		((u16 *) rdptr)[i] = DM9000_inw(DM9000_DATA);
    
    #endif				/*  */
    #ifdef CONFIG_DM9000_USE_32BIT
    	tmplen = (RxLen + 3) / 4;
    	for (i = 0; i < tmplen; i++)
    		((u32 *) rdptr)[i] = DM9000_inl(DM9000_DATA);
    
    #endif				/*  */
    	if ((RxStatus & 0xbf00) || (RxLen < 0x40)
    	    || (RxLen > DM9000_PKT_MAX)) {
    		if (RxStatus & 0x100) {
    			printk("rx fifo error\n");
    		}
    		if (RxStatus & 0x200) {
    			printk("rx crc error\n");
    		}
    		if (RxStatus & 0x8000) {
    			printk("rx length error\n");
    		}
    		if (RxLen > DM9000_PKT_MAX) {
    			printk("rx length too big\n");
    			dm9000_reset();
    			return 0;
    		}

    	} else {
    
    		/* Pass to upper layer */
    		//DM9000_DBG("passing packet to upper layer\n");
    		NetReceive(NetRxPackets[0], RxLen);
    		return RxLen;
    	}
    };

	return 0;
}

#if 0
/*
  Read a word data from SROM
*/
static u16
read_srom_word(int offset)
{
	DM9000_iow(DM9000_EPAR, offset);
	DM9000_iow(DM9000_EPCR, 0x4);
	udelay(200);
	DM9000_iow(DM9000_EPCR, 0x0);
	return (DM9000_ior(DM9000_EPDRL) + (DM9000_ior(DM9000_EPDRH) << 8));
}
#endif

/*
   Read a byte from I/O port
*/
static u8
DM9000_ior(int reg)
{
	DM9000_outb(reg, DM9000_IO);
	return DM9000_inb(DM9000_DATA);
}

/*
   Write a byte to I/O port
*/
static void
DM9000_iow(int reg, u8 value)
{
	DM9000_outb(reg, DM9000_IO);
	DM9000_outb(value, DM9000_DATA);
}

/*
   Read a word from phyxcer
*/
static u16
phy_read(int reg)
{
	u16 val;

	/* Fill the phyxcer register into REG_0C */
	DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);
	DM9000_iow(DM9000_EPCR, 0xc);	/* Issue phyxcer read command */
	udelay(100);		/* Wait read complete */
	DM9000_iow(DM9000_EPCR, 0x0);	/* Clear phyxcer read command */
	val = (DM9000_ior(DM9000_EPDRH) << 8) | DM9000_ior(DM9000_EPDRL);

	/* The read data keeps on REG_0D & REG_0E */
	DM9000_DBG("phy_read(%d): %d\n", reg, val);
	return val;
}

/*
   Write a word to phyxcer
*/
static void
phy_write(int reg, u16 value)
{

	/* Fill the phyxcer register into REG_0C */
	DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);

	/* Fill the written data into REG_0D & REG_0E */
	DM9000_iow(DM9000_EPDRL, (value & 0xff));
	DM9000_iow(DM9000_EPDRH, ((value >> 8) & 0xff));
	DM9000_iow(DM9000_EPCR, 0xa);	/* Issue phyxcer write command */
	udelay(500);		/* Wait write complete */
	DM9000_iow(DM9000_EPCR, 0x0);	/* Clear phyxcer write command */
	DM9000_DBG("phy_write(reg:%d, value:%d)\n", reg, value);
}
#endif				/* CONFIG_DRIVER_DM9000 */