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