1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
* flexcop-eeprom.c - eeprom access methods (currently only MAC address reading)
* see flexcop.c for copyright information
*/
#include "flexcop.h"
#if 0
/*EEPROM (Skystar2 has one "24LC08B" chip on board) */
static int eeprom_write(struct adapter *adapter, u16 addr, u8 *buf, u16 len)
{
return flex_i2c_write(adapter, 0x20000000, 0x50, addr, buf, len);
}
static int eeprom_lrc_write(struct adapter *adapter, u32 addr,
u32 len, u8 *wbuf, u8 *rbuf, int retries)
{
int i;
for (i = 0; i < retries; i++) {
if (eeprom_write(adapter, addr, wbuf, len) == len) {
if (eeprom_lrc_read(adapter, addr, len, rbuf, retries) == 1)
return 1;
}
}
return 0;
}
/* These functions could be used to unlock SkyStar2 cards. */
static int eeprom_writeKey(struct adapter *adapter, u8 *key, u32 len)
{
u8 rbuf[20];
u8 wbuf[20];
if (len != 16)
return 0;
memcpy(wbuf, key, len);
wbuf[16] = 0;
wbuf[17] = 0;
wbuf[18] = 0;
wbuf[19] = calc_lrc(wbuf, 19);
return eeprom_lrc_write(adapter, 0x3e4, 20, wbuf, rbuf, 4);
}
static int eeprom_readKey(struct adapter *adapter, u8 *key, u32 len)
{
u8 buf[20];
if (len != 16)
return 0;
if (eeprom_lrc_read(adapter, 0x3e4, 20, buf, 4) == 0)
return 0;
memcpy(key, buf, len);
return 1;
}
static char eeprom_set_mac_addr(struct adapter *adapter, char type, u8 *mac)
{
u8 tmp[8];
if (type != 0) {
tmp[0] = mac[0];
tmp[1] = mac[1];
tmp[2] = mac[2];
tmp[3] = mac[5];
tmp[4] = mac[6];
tmp[5] = mac[7];
} else {
tmp[0] = mac[0];
tmp[1] = mac[1];
tmp[2] = mac[2];
tmp[3] = mac[3];
tmp[4] = mac[4];
tmp[5] = mac[5];
}
tmp[6] = 0;
tmp[7] = calc_lrc(tmp, 7);
if (eeprom_write(adapter, 0x3f8, tmp, 8) == 8)
return 1;
return 0;
}
static int flexcop_eeprom_read(struct flexcop_device *fc,
u16 addr, u8 *buf, u16 len)
{
return fc->i2c_request(fc,FC_READ,FC_I2C_PORT_EEPROM,0x50,addr,buf,len);
}
#endif
static u8 calc_lrc(u8 *buf, int len)
{
int i;
u8 sum = 0;
for (i = 0; i < len; i++)
sum = sum ^ buf[i];
return sum;
}
static int flexcop_eeprom_request(struct flexcop_device *fc,
flexcop_access_op_t op, u16 addr, u8 *buf, u16 len, int retries)
{
int i,ret = 0;
u8 chipaddr = 0x50 | ((addr >> 8) & 3);
for (i = 0; i < retries; i++) {
ret = fc->i2c_request(&fc->fc_i2c_adap[1], op, chipaddr,
addr & 0xff, buf, len);
if (ret == 0)
break;
}
return ret;
}
static int flexcop_eeprom_lrc_read(struct flexcop_device *fc, u16 addr,
u8 *buf, u16 len, int retries)
{
int ret = flexcop_eeprom_request(fc, FC_READ, addr, buf, len, retries);
if (ret == 0)
if (calc_lrc(buf, len - 1) != buf[len - 1])
ret = -EINVAL;
return ret;
}
/* JJ's comment about extended == 1: it is not presently used anywhere but was
* added to the low-level functions for possible support of EUI64 */
int flexcop_eeprom_check_mac_addr(struct flexcop_device *fc, int extended)
{
u8 buf[8];
int ret = 0;
if ((ret = flexcop_eeprom_lrc_read(fc,0x3f8,buf,8,4)) == 0) {
if (extended != 0) {
err("TODO: extended (EUI64) MAC addresses aren't "
"completely supported yet");
ret = -EINVAL;
} else
memcpy(fc->dvb_adapter.proposed_mac,buf,6);
}
return ret;
}
EXPORT_SYMBOL(flexcop_eeprom_check_mac_addr);
|
