| Jean-Christophe PLAGNIOL-VILLARD | d87c24f | 2008-04-24 07:57:17 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (c) 2007 Nobuhiro Iwamatsu <iwamatsu@nigauri.org> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | */ |
| 18 | #include <common.h> |
| 19 | #include "ax88796.h" |
| 20 | |
| 21 | /* |
| 22 | * Set 1 bit data |
| 23 | */ |
| 24 | static void ax88796_bitset(u32 bit) |
| 25 | { |
| 26 | /* DATA1 */ |
| 27 | if( bit ) |
| 28 | EEDI_HIGH; |
| 29 | else |
| 30 | EEDI_LOW; |
| 31 | |
| 32 | EECLK_LOW; |
| 33 | udelay(1000); |
| 34 | EECLK_HIGH; |
| 35 | udelay(1000); |
| 36 | EEDI_LOW; |
| 37 | } |
| 38 | |
| 39 | /* |
| 40 | * Get 1 bit data |
| 41 | */ |
| 42 | static u8 ax88796_bitget(void) |
| 43 | { |
| 44 | u8 bit; |
| 45 | |
| 46 | EECLK_LOW; |
| 47 | udelay(1000); |
| 48 | /* DATA */ |
| 49 | bit = EEDO; |
| 50 | EECLK_HIGH; |
| 51 | udelay(1000); |
| 52 | |
| 53 | return bit; |
| 54 | } |
| 55 | |
| 56 | /* |
| 57 | * Send COMMAND to EEPROM |
| 58 | */ |
| 59 | static void ax88796_eep_cmd(u8 cmd) |
| 60 | { |
| 61 | ax88796_bitset(BIT_DUMMY); |
| 62 | switch(cmd){ |
| 63 | case MAC_EEP_READ: |
| 64 | ax88796_bitset(1); |
| 65 | ax88796_bitset(1); |
| 66 | ax88796_bitset(0); |
| 67 | break; |
| 68 | |
| 69 | case MAC_EEP_WRITE: |
| 70 | ax88796_bitset(1); |
| 71 | ax88796_bitset(0); |
| 72 | ax88796_bitset(1); |
| 73 | break; |
| 74 | |
| 75 | case MAC_EEP_ERACE: |
| 76 | ax88796_bitset(1); |
| 77 | ax88796_bitset(1); |
| 78 | ax88796_bitset(1); |
| 79 | break; |
| 80 | |
| 81 | case MAC_EEP_EWEN: |
| 82 | ax88796_bitset(1); |
| 83 | ax88796_bitset(0); |
| 84 | ax88796_bitset(0); |
| 85 | break; |
| 86 | |
| 87 | case MAC_EEP_EWDS: |
| 88 | ax88796_bitset(1); |
| 89 | ax88796_bitset(0); |
| 90 | ax88796_bitset(0); |
| 91 | break; |
| 92 | default: |
| 93 | break; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | static void ax88796_eep_setaddr(u16 addr) |
| 98 | { |
| 99 | int i ; |
| 100 | |
| 101 | for( i = 7 ; i >= 0 ; i-- ) |
| 102 | ax88796_bitset(addr & (1 << i)); |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * Get data from EEPROM |
| 107 | */ |
| 108 | static u16 ax88796_eep_getdata(void) |
| 109 | { |
| 110 | ushort data = 0; |
| 111 | int i; |
| 112 | |
| 113 | ax88796_bitget(); /* DUMMY */ |
| 114 | for( i = 0 ; i < 16 ; i++ ){ |
| 115 | data <<= 1; |
| 116 | data |= ax88796_bitget(); |
| 117 | } |
| 118 | return data; |
| 119 | } |
| 120 | |
| 121 | static void ax88796_mac_read(u8 *buff) |
| 122 | { |
| 123 | int i ; |
| 124 | u16 data; |
| 125 | u16 addr = 0; |
| 126 | |
| 127 | for( i = 0 ; i < 3; i++ ) |
| 128 | { |
| 129 | EECS_HIGH; |
| 130 | EEDI_LOW; |
| 131 | udelay(1000); |
| 132 | /* READ COMMAND */ |
| 133 | ax88796_eep_cmd(MAC_EEP_READ); |
| 134 | /* ADDRESS */ |
| 135 | ax88796_eep_setaddr(addr++); |
| 136 | /* GET DATA */ |
| 137 | data = ax88796_eep_getdata(); |
| 138 | *buff++ = (uchar)(data & 0xff); |
| 139 | *buff++ = (uchar)((data >> 8) & 0xff); |
| 140 | EECLK_LOW; |
| 141 | EEDI_LOW; |
| 142 | EECS_LOW; |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | int get_prom(u8* mac_addr) |
| 147 | { |
| 148 | u8 prom[32]; |
| 149 | int i; |
| 150 | |
| 151 | ax88796_mac_read(prom); |
| 152 | for (i = 0; i < 6; i++){ |
| 153 | mac_addr[i] = prom[i]; |
| 154 | } |
| 155 | return 1; |
| 156 | } |