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#include <common.h>
#include <mach/netx-regs.h>
#include <mach/netx-cm.h>
#define I2C_CTRL_ENABLE (1<<0)
#define I2C_CTRL_SPEED_25 (0<<1)
#define I2C_CTRL_SPEED_50 (1<<1)
#define I2C_CTRL_SPEED_100 (2<<1)
#define I2C_CTRL_SPEED_200 (3<<1)
#define I2C_CTRL_SPEED_400 (4<<1)
#define I2C_CTRL_SPEED_600 (5<<1)
#define I2C_CTRL_SPEED_800 (6<<1)
#define I2C_CTRL_SPEED_1000 (7<<1)
#define I2C_CTRL_SLAVEID(id) (((id) & 0x7f) << 4)
#define I2C_DATA_SEND_STOP (1<<8)
#define I2C_DATA_READ (1<<9)
#define I2C_DATA_SEND_START (1<<10)
#define I2C_DATA_BUSY (1<<11)
#define I2C_DATA_EXECUTE (1<<11)
#define I2C_DATA_RDF (1<<12)
/* INS */
#define AT88_WRITE_USER_ZONE 0xb0
#define AT88_READ_USER_ZONE 0xb2
#define AT88_SYSTEM_WRITE 0xb4
#define AT88_SYSTEM_READ 0xb6
/* P1 */
#define AT88_READ_CONFIG_ZONE 0x00
#define AT88_SET_USER_ZONE 0x03
#define SEND_START (1<<0)
#define SEND_STOP (1<<1)
#define IGNORE_RDF (1<<2)
#define MAX_USER_ZONE_SIZE 128
/*
* netx i2c functions
*/
static inline void i2c_set_slaveid(uchar id)
{
unsigned int val;
val = NETX_I2C_CTRL_REG;
val &= 0xf;
val |= I2C_CTRL_SLAVEID(id);
NETX_I2C_CTRL_REG = val;
}
static inline uchar i2c_read_byte(int flags)
{
unsigned int val = I2C_DATA_EXECUTE | I2C_DATA_READ;
if(flags & SEND_START)
val |= I2C_DATA_SEND_START;
if(flags & SEND_STOP)
val |= I2C_DATA_SEND_STOP;
NETX_I2C_DATA_REG = val;
while(NETX_I2C_DATA_REG & I2C_DATA_BUSY);
return NETX_I2C_DATA_REG & 0xff;
}
static inline void i2c_write_byte(uchar byte, int flags)
{
unsigned int val = byte;
if(flags & SEND_START)
val |= I2C_DATA_SEND_START;
if(flags & SEND_STOP)
val |= I2C_DATA_SEND_STOP;
val |= I2C_DATA_EXECUTE;
NETX_I2C_DATA_REG = val;
while(NETX_I2C_DATA_REG & I2C_DATA_BUSY);
}
void i2c_init (int speed)
{
unsigned int val;
switch(speed) {
case 25000:
val = I2C_CTRL_SPEED_25;
break;
case 50000:
val = I2C_CTRL_SPEED_50;
break;
case 100000:
val = I2C_CTRL_SPEED_100;
break;
case 200000:
val = I2C_CTRL_SPEED_200;
break;
case 400000:
val = I2C_CTRL_SPEED_400;
break;
case 600000:
val = I2C_CTRL_SPEED_600;
break;
case 800000:
val = I2C_CTRL_SPEED_800;
break;
case 1000000:
val = I2C_CTRL_SPEED_1000;
break;
default:
printf("unsupported speed %d. defaulting to 100kHz\n",speed);
val = I2C_CTRL_SPEED_100;
break;
}
NETX_I2C_CTRL_REG = val | I2C_CTRL_ENABLE;
i2c_write_byte(0xff, 0);
udelay(2000);
}
/*
* at88SCxxxx CryptoMemory functions
*/
struct at88_parm {
char *name;
int zones;
int zone_size;
uchar atr[8];
};
struct at88_parm at88_parm_table[] = {
{ .name = "at88sc0104c", .zones = 4, .zone_size = 32, .atr = { 0x3b, 0xb2, 0x11, 0x00, 0x10, 0x80, 0x00, 0x01 } },
{ .name = "at88sc0204c", .zones = 4, .zone_size = 64, .atr = { 0x3b, 0xb2, 0x11, 0x00, 0x10, 0x80, 0x00, 0x02 } },
{ .name = "at88sc0404c", .zones = 4, .zone_size = 128, .atr = { 0x3b, 0xb2, 0x11, 0x00, 0x10, 0x80, 0x00, 0x04 } },
{ .name = "at88sc0808c", .zones = 8, .zone_size = 128, .atr = { 0x3b, 0xb2, 0x11, 0x00, 0x10, 0x80, 0x00, 0x08 } },
{ .name = "at88sc1616c", .zones = 16, .zone_size = 128, .atr = { 0x3b, 0xb2, 0x11, 0x00, 0x10, 0x80, 0x00, 0x16 } },
};
#define parm_size (sizeof(at88_parm_table) / sizeof(struct at88_parm))
struct at88_parm *at88_parm = NULL;
int set_user_zone(uchar zone)
{
if(zone >= at88_parm->zones)
return -1;
i2c_set_slaveid(AT88_SYSTEM_WRITE >> 1);
i2c_write_byte(AT88_SET_USER_ZONE, SEND_START);
i2c_write_byte(zone, 0);
i2c_write_byte(8, SEND_STOP);
return 0;
}
/*
* We chose the easy way here and read/write whole zones at once
*/
int read_user_zone(char *buf)
{
int i;
i2c_set_slaveid(AT88_READ_USER_ZONE >> 1);
i2c_write_byte(0, SEND_START);
i2c_write_byte(0, 0);
i2c_write_byte(at88_parm->zone_size, 0);
for(i=0; i < at88_parm->zone_size; i++)
buf[i] = i2c_read_byte( i==at88_parm->zone_size - 1 ? SEND_STOP : 0);
return 0;
}
#define BLK_SIZE 16
int write_user_zone(char *buf)
{
int i,block;
for(block=0; block < at88_parm->zone_size/16; block++) {
i2c_set_slaveid(AT88_WRITE_USER_ZONE >> 1);
i2c_write_byte(0, SEND_START);
i2c_write_byte(block * BLK_SIZE, 0);
i2c_write_byte(BLK_SIZE, 0);
for(i=0; i<BLK_SIZE; i++)
i2c_write_byte( buf[block * BLK_SIZE + i], i == BLK_SIZE - 1 ? SEND_STOP : 0);
udelay(16000);
}
return 0;
}
struct netx_cm_userarea netx_cm_userarea;
struct netx_cm_userarea* netx_cm_get_userarea(void)
{
set_user_zone(1);
if( read_user_zone((char *)&netx_cm_userarea.area_1) )
return NULL;
set_user_zone(2);
if( read_user_zone((char *)&netx_cm_userarea.area_2) )
return NULL;
set_user_zone(3);
if( read_user_zone((char *)&netx_cm_userarea.area_2) )
return NULL;
return &netx_cm_userarea;
}
int netx_cm_write_userarea(struct netx_cm_userarea *area)
{
set_user_zone(1);
if( write_user_zone( (char *)&area->area_1 ) )
return -1;
set_user_zone(2);
if( write_user_zone( (char *)&area->area_2 ) )
return -1;
set_user_zone(3);
if( write_user_zone( (char *)&area->area_2 ) )
return -1;
return 0;
}
unsigned short crc16(unsigned short crc, unsigned int data)
{
crc = (crc >> 8) | ((crc & 0xff) << 8);
crc ^= data;
crc ^= (crc & 0xff) >> 4;
crc ^= (crc & 0x0f) << 12;
crc ^= ((crc & 0xff) << 4) << 1;
return crc;
}
#define ETH_MAC_4321 0x1564
#define ETH_MAC_65 0x1568
int netx_cm_init(void)
{
int i;
char buf[MAX_USER_ZONE_SIZE];
struct netx_cm_userarea *area;
i2c_init(100000);
i2c_set_slaveid(AT88_SYSTEM_READ >> 1);
i2c_write_byte(AT88_READ_CONFIG_ZONE, SEND_START);
i2c_write_byte(0, 0); /* adr */
i2c_write_byte(8, 0); /* len */
for(i=0;i<8;i++)
buf[i] = i2c_read_byte( i==7 ? SEND_STOP : 0 );
for(i=0; i<parm_size; i++) {
if(!memcmp(buf,at88_parm_table[i].atr,8)) {
at88_parm = &at88_parm_table[i];
break;
}
}
if(!at88_parm) {
printf("no crypto flash found\n");
debug("unrecognized atr: ");
for(i=0; i<8; i++)
debug("0x%02x ",buf[i]);
printf("\n");
return -1;
}
printf("%s crypto flash found\n",at88_parm->name);
area = netx_cm_get_userarea();
for(i=0;i<4;i++) {
printf("xc%d mac: %02x:%02x:%02x:%02x:%02x:%02x\n", i,
area->area_1.mac[i][0],
area->area_1.mac[i][1],
area->area_1.mac[i][2],
area->area_1.mac[i][3],
area->area_1.mac[i][4],
area->area_1.mac[i][5]);
XPEC_REG(i, XPEC_RAM_START + ETH_MAC_4321) =
area->area_1.mac[i][0] |
area->area_1.mac[i][1]<<8 |
area->area_1.mac[i][2]<<16 |
area->area_1.mac[i][3]<<24;
XPEC_REG(i, XPEC_RAM_START + ETH_MAC_65) =
area->area_1.mac[i][4] |
area->area_1.mac[i][5]<<8;
}
for(i=0; i<6; i++)
gd->bd->bi_enetaddr[i] = area->area_1.mac[CONFIG_DRIVER_NET_NETX_XCNO][i];
sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
area->area_1.mac[CONFIG_DRIVER_NET_NETX_XCNO][0],
area->area_1.mac[CONFIG_DRIVER_NET_NETX_XCNO][1],
area->area_1.mac[CONFIG_DRIVER_NET_NETX_XCNO][2],
area->area_1.mac[CONFIG_DRIVER_NET_NETX_XCNO][3],
area->area_1.mac[CONFIG_DRIVER_NET_NETX_XCNO][4],
area->area_1.mac[CONFIG_DRIVER_NET_NETX_XCNO][5]);
setenv("ethaddr", buf);
return 0;
}
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