에프에이리눅스 / 1611_0007_prime_oven

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bootloader/u-boot_2015_04/drivers/net/ax88796.c 1.99 KB
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6b13f685e   김민수   BSP 최초 추가 
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  /*
   * (c) 2007 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  #include <common.h>
  #include "ax88796.h"
  
  /*
   * Set 1 bit data
   */
  static void ax88796_bitset(u32 bit)
  {
  	/* DATA1 */
  	if( bit )
  		EEDI_HIGH;
  	else
  		EEDI_LOW;
  
  	EECLK_LOW;
  	udelay(1000);
  	EECLK_HIGH;
  	udelay(1000);
  	EEDI_LOW;
  }
  
  /*
   * Get 1 bit data
   */
  static u8 ax88796_bitget(void)
  {
  	u8 bit;
  
  	EECLK_LOW;
  	udelay(1000);
  	/* DATA */
  	bit = EEDO;
  	EECLK_HIGH;
  	udelay(1000);
  
  	return bit;
  }
  
  /*
   * Send COMMAND to EEPROM
   */
  static void ax88796_eep_cmd(u8 cmd)
  {
  	ax88796_bitset(BIT_DUMMY);
  	switch(cmd){
  		case MAC_EEP_READ:
  			ax88796_bitset(1);
  			ax88796_bitset(1);
  			ax88796_bitset(0);
  			break;
  
  		case MAC_EEP_WRITE:
  			ax88796_bitset(1);
  			ax88796_bitset(0);
  			ax88796_bitset(1);
  			break;
  
  		case MAC_EEP_ERACE:
  			ax88796_bitset(1);
  			ax88796_bitset(1);
  			ax88796_bitset(1);
  			break;
  
  		case MAC_EEP_EWEN:
  			ax88796_bitset(1);
  			ax88796_bitset(0);
  			ax88796_bitset(0);
  			break;
  
  		case MAC_EEP_EWDS:
  			ax88796_bitset(1);
  			ax88796_bitset(0);
  			ax88796_bitset(0);
  			break;
  		default:
  			break;
  	}
  }
  
  static void ax88796_eep_setaddr(u16 addr)
  {
  	int i ;
  
  	for( i = 7 ; i >= 0 ; i-- )
  		ax88796_bitset(addr & (1 << i));
  }
  
  /*
   * Get data from EEPROM
   */
  static u16 ax88796_eep_getdata(void)
  {
  	ushort data = 0;
  	int i;
  
  	ax88796_bitget();	/* DUMMY */
  	for( i = 0 ; i < 16 ; i++ ){
  		data <<= 1;
  		data |= ax88796_bitget();
  	}
  	return data;
  }
  
  static void ax88796_mac_read(u8 *buff)
  {
  	int i ;
  	u16 data;
  	u16 addr = 0;
  
  	for( i = 0 ; i < 3; i++ )
  	{
  		EECS_HIGH;
  		EEDI_LOW;
  		udelay(1000);
  		/* READ COMMAND */
  		ax88796_eep_cmd(MAC_EEP_READ);
  		/* ADDRESS */
  		ax88796_eep_setaddr(addr++);
  		/* GET DATA */
  		data = ax88796_eep_getdata();
  		*buff++ = (uchar)(data & 0xff);
  		*buff++ = (uchar)((data >> 8) & 0xff);
  		EECLK_LOW;
  		EEDI_LOW;
  		EECS_LOW;
  	}
  }
  
  int get_prom(u8* mac_addr, u8* base_addr)
  {
  	u8 prom[32];
  	int i;
  
  	ax88796_mac_read(prom);
  	for (i = 0; i < 6; i++){
  		mac_addr[i] = prom[i];
  	}
  	return 1;
  }