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#include "memio.h"
#include "articiaS.h"
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
void sm_write_mode(void)
{
out_byte(0xA539, 0x00);
out_byte(0xA53A, 0x03);
}
void sm_read_mode(void)
{
out_byte(0xA53A, 0x02);
out_byte(0xA539, 0x02);
}
void sm_write_byte(uint8 writeme)
{
int i;
int level;
out_byte(0xA539, 0x00);
level = 0;
for (i=0; i<8; i++)
{
if ((writeme & 0x80) == (level<<7))
{
/* Bit did not change, rewrite strobe */
out_byte(0xA539, level | 0x02);
out_byte(0xA539, level);
}
else
{
/* Bit changed, set bit, then strobe */
level = (writeme & 0x80) >> 7;
out_byte(0xA539, level);
out_byte(0xA539, level | 0x02);
out_byte(0xA539, level);
}
writeme <<= 1;
}
out_byte(0xA539, 0x00);
}
uint8 sm_read_byte(void)
{
uint8 retme, r;
int i;
retme = 0;
for (i=0; i<8; i++)
{
retme <<= 1;
out_byte(0xA539, 0x00);
out_byte(0xA539, 0x02);
r = in_byte(0xA538) & 0x01;
retme |= r;
}
return retme;
}
int sm_get_ack(void)
{
uint8 r;
r = in_byte(0xA538);
if ((r&0x01) == 0) return TRUE;
else return FALSE;
}
void sm_write_ack(void)
{
out_byte(0xA539, 0x00);
out_byte(0xA539, 0x02);
out_byte(0xA539, 0x00);
}
void sm_write_nack(void)
{
out_byte(0xA539, 0x01);
out_byte(0xA539, 0x03);
out_byte(0xA539, 0x01);
}
void sm_send_start(void)
{
out_byte(0xA539, 0x03);
out_byte(0xA539, 0x02);
}
void sm_send_stop(void)
{
out_byte(0xA539, 0x02);
out_byte(0xA539, 0x03);
}
int sm_read_byte_from_device(uint8 addr, uint8 reg, uint8 *storage)
{
/* S Addr Wr */
sm_write_mode();
sm_send_start();
sm_write_byte((addr<<1));
/* [A] */
sm_read_mode();
if (sm_get_ack() == FALSE) return FALSE;
/* Comm */
sm_write_mode();
sm_write_byte(reg);
/* [A] */
sm_read_mode();
if (sm_get_ack() == FALSE) return FALSE;
/* S Addr Rd */
sm_write_mode();
sm_send_start();
sm_write_byte((addr<<1)|1);
/* [A] */
sm_read_mode();
if (sm_get_ack() == FALSE) return FALSE;
/* [Data] */
*storage = sm_read_byte();
/* NA */
sm_write_mode();
sm_write_nack();
sm_send_stop();
return TRUE;
}
void sm_init(void)
{
/* Switch to PMC mode */
pci_write_cfg_byte(0, 0, REG_GROUP, (uint8)(REG_GROUP_SPECIAL|REG_GROUP_POWER));
/* Set GPIO Base */
pci_write_cfg_long(0, 0, 0x40, 0xa500);
/* Enable GPIO */
pci_write_cfg_byte(0, 0, 0x44, 0x11);
/* Set both GPIO 0 and 1 as output */
out_byte(0xA53A, 0x03);
}
void sm_term(void)
{
/* Switch to normal mode */
pci_write_cfg_byte(0, 0, REG_GROUP, 0);
}
int sm_get_data(uint8 *DataArray, int dimm_socket)
{
int j;
#if 0
/* Switch to PMC mode */
pci_write_cfg_byte(0, 0, REG_GROUP, (uint8)(REG_GROUP_SPECIAL|REG_GROUP_POWER));
/* Set GPIO Base */
pci_write_cfg_long(0, 0, 0x40, 0xa500);
/* Enable GPIO */
pci_write_cfg_byte(0, 0, 0x44, 0x11);
/* Set both GPIO 0 and 1 as output */
out_byte(0xA53A, 0x03);
#endif
sm_init();
/* Start reading the rom */
j = 0;
do
{
if (sm_read_byte_from_device(dimm_socket, (uint8)j, DataArray) == FALSE)
{
sm_term();
return FALSE;
}
DataArray++;
j++;
} while (j < 128);
sm_term();
return TRUE;
}
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