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Commit | Line | Data |
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2ef7503a JCPV |
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 | } |