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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 3a7d55716d6bfe5122de9692383357344fff2a94 / . / drivers / net / ax88796.c
blob: 01c1ae27299c1f45e5b9c462b044582c507940e6 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -0400[diff] [blame]1// SPDX-License-Identifier: GPL-2.0+
Jean-Christophe PLAGNIOL-VILLARD2ef75032008-04-24 07:57:17 +0200[diff] [blame]2/*
3 * (c) 2007 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Jean-Christophe PLAGNIOL-VILLARD2ef75032008-04-24 07:57:17 +0200[diff] [blame]4 */
5#include <common.h>
6#include "ax88796.h"
7
8/*
9 * Set 1 bit data
10 */
11static void ax88796_bitset(u32 bit)
12{
13 /* DATA1 */
14 if( bit )
15 EEDI_HIGH;
16 else
17 EEDI_LOW;
18
19 EECLK_LOW;
20 udelay(1000);
21 EECLK_HIGH;
22 udelay(1000);
23 EEDI_LOW;
24}
25
26/*
27 * Get 1 bit data
28 */
29static u8 ax88796_bitget(void)
30{
31 u8 bit;
32
33 EECLK_LOW;
34 udelay(1000);
35 /* DATA */
36 bit = EEDO;
37 EECLK_HIGH;
38 udelay(1000);
39
40 return bit;
41}
42
43/*
44 * Send COMMAND to EEPROM
45 */
46static void ax88796_eep_cmd(u8 cmd)
47{
48 ax88796_bitset(BIT_DUMMY);
49 switch(cmd){
50 case MAC_EEP_READ:
51 ax88796_bitset(1);
52 ax88796_bitset(1);
53 ax88796_bitset(0);
54 break;
55
56 case MAC_EEP_WRITE:
57 ax88796_bitset(1);
58 ax88796_bitset(0);
59 ax88796_bitset(1);
60 break;
61
62 case MAC_EEP_ERACE:
63 ax88796_bitset(1);
64 ax88796_bitset(1);
65 ax88796_bitset(1);
66 break;
67
68 case MAC_EEP_EWEN:
69 ax88796_bitset(1);
70 ax88796_bitset(0);
71 ax88796_bitset(0);
72 break;
73
74 case MAC_EEP_EWDS:
75 ax88796_bitset(1);
76 ax88796_bitset(0);
77 ax88796_bitset(0);
78 break;
79 default:
80 break;
81 }
82}
83
84static void ax88796_eep_setaddr(u16 addr)
85{
86 int i ;
87
88 for( i = 7 ; i >= 0 ; i-- )
89 ax88796_bitset(addr & (1 << i));
90}
91
92/*
93 * Get data from EEPROM
94 */
95static u16 ax88796_eep_getdata(void)
96{
97 ushort data = 0;
98 int i;
99
100 ax88796_bitget(); /* DUMMY */
101 for( i = 0 ; i < 16 ; i++ ){
102 data <<= 1;
103 data |= ax88796_bitget();
104 }
105 return data;
106}
107
108static void ax88796_mac_read(u8 *buff)
109{
110 int i ;
111 u16 data;
112 u16 addr = 0;
113
114 for( i = 0 ; i < 3; i++ )
115 {
116 EECS_HIGH;
117 EEDI_LOW;
118 udelay(1000);
119 /* READ COMMAND */
120 ax88796_eep_cmd(MAC_EEP_READ);
121 /* ADDRESS */
122 ax88796_eep_setaddr(addr++);
123 /* GET DATA */
124 data = ax88796_eep_getdata();
125 *buff++ = (uchar)(data & 0xff);
126 *buff++ = (uchar)((data >> 8) & 0xff);
127 EECLK_LOW;
128 EEDI_LOW;
129 EECS_LOW;
130 }
131}
132
Nobuhiro Iwamatsu702c85b2008-09-30 15:02:53 +0900[diff] [blame]133int get_prom(u8* mac_addr, u8* base_addr)
Jean-Christophe PLAGNIOL-VILLARD2ef75032008-04-24 07:57:17 +0200[diff] [blame]134{
135 u8 prom[32];
136 int i;
137
138 ax88796_mac_read(prom);
139 for (i = 0; i < 6; i++){
140 mac_addr[i] = prom[i];
141 }
142 return 1;
143}