| /* |
| * (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; |
| } |