void ddrrd(char *startaddr)
{
char *c;
unsigned int addr;
int i;
if(*startaddr == 0) {
printf("ddrrd <address>\n");
return;
}
addr = strtoul(startaddr, &c, 0);
if(*c != 0) {
printf("incorrect address\n");
return;
}
dfii_pi0_address_write(addr);
dfii_pi0_baddress_write(0);
command_p0(DFII_COMMAND_CAS|DFII_COMMAND_CS|DFII_COMMAND_RDDATA);
cdelay(15);
for(i=0;i<8;i++)
printf("%02x", MMPTR(0xe0000834+4*i));
for(i=0;i<8;i++)
printf("%02x", MMPTR(0xe0000884+4*i));
printf("\n");
}
void sdrwloff(void)
{
dfii_pi0_address_write(DDR3_MR1);
dfii_pi0_baddress_write(1);
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS);
ddrphy_wlevel_en_write(0);
}
void ddrrow(char *_row)
{
char *c;
unsigned int row;
if(*_row == 0) {
dfii_pi0_address_write(0x0000);
dfii_pi0_baddress_write(0);
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_WE|DFII_COMMAND_CS);
cdelay(15);
printf("Precharged\n");
} else {
row = strtoul(_row, &c, 0);
if(*c != 0) {
printf("incorrect row\n");
return;
}
dfii_pi0_address_write(row);
dfii_pi0_baddress_write(0);
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CS);
cdelay(15);
printf("Activated row %d\n", row);
}
}
static void init_sequence(void)
{
int i;
/* Bring CKE high */
dfii_pi0_address_write(0x0000);
dfii_pi0_baddress_write(0);
dfii_control_write(DFII_CONTROL_CKE);
/* Precharge All */
dfii_pi0_address_write(0x0400);
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_WE|DFII_COMMAND_CS);
/* Load Extended Mode Register */
dfii_pi0_baddress_write(1);
dfii_pi0_address_write(0x0000);
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS);
dfii_pi0_baddress_write(0);
/* Load Mode Register */
dfii_pi0_address_write(0x0132); /* Reset DLL, CL=3, BL=4 */
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS);
cdelay(200);
/* Precharge All */
dfii_pi0_address_write(0x0400);
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_WE|DFII_COMMAND_CS);
/* 2x Auto Refresh */
for(i=0;i<2;i++) {
dfii_pi0_address_write(0);
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_CS);
cdelay(4);
}
/* Load Mode Register */
dfii_pi0_address_write(0x0032); /* CL=3, BL=4 */
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS);
cdelay(200);
}
static void read_delays(void)
{
unsigned int prv;
unsigned char prs[DFII_NPHASES*DFII_PIX_DATA_SIZE];
int p, i, j;
int working;
int delay, delay_min, delay_max;
printf("Read delays: ");
/* Generate pseudo-random sequence */
prv = 42;
for(i=0;i<DFII_NPHASES*DFII_PIX_DATA_SIZE;i++) {
prv = 1664525*prv + 1013904223;
prs[i] = prv;
}
/* Activate */
dfii_pi0_address_write(0);
dfii_pi0_baddress_write(0);
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CS);
cdelay(15);
/* Write test pattern */
for(p=0;p<DFII_NPHASES;p++)
for(i=0;i<DFII_PIX_DATA_SIZE;i++)
MMPTR(dfii_pix_wrdata_addr[p]+4*i) = prs[DFII_PIX_DATA_SIZE*p+i];
dfii_piwr_address_write(0);
dfii_piwr_baddress_write(0);
command_pwr(DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS|DFII_COMMAND_WRDATA);
/* Calibrate each DQ in turn */
dfii_pird_address_write(0);
dfii_pird_baddress_write(0);
for(i=0;i<DFII_PIX_DATA_SIZE/2;i++) {
ddrphy_dly_sel_write(1 << (DFII_PIX_DATA_SIZE/2-i-1));
delay = 0;
/* Find smallest working delay */
ddrphy_rdly_dq_rst_write(1);
while(1) {
command_prd(DFII_COMMAND_CAS|DFII_COMMAND_CS|DFII_COMMAND_RDDATA);
cdelay(15);
working = 1;
for(p=0;p<DFII_NPHASES;p++) {
if(MMPTR(dfii_pix_rddata_addr[p]+4*i) != prs[DFII_PIX_DATA_SIZE*p+i])
working = 0;
if(MMPTR(dfii_pix_rddata_addr[p]+4*(i+DFII_PIX_DATA_SIZE/2)) != prs[DFII_PIX_DATA_SIZE*p+i+DFII_PIX_DATA_SIZE/2])
working = 0;
}
if(working)
break;
delay++;
if(delay >= ERR_DDRPHY_DELAY)
break;
ddrphy_rdly_dq_inc_write(1);
}
delay_min = delay;
/* Get a bit further into the working zone */
delay++;
ddrphy_rdly_dq_inc_write(1);
/* Find largest working delay */
while(1) {
command_prd(DFII_COMMAND_CAS|DFII_COMMAND_CS|DFII_COMMAND_RDDATA);
cdelay(15);
working = 1;
for(p=0;p<DFII_NPHASES;p++) {
if(MMPTR(dfii_pix_rddata_addr[p]+4*i) != prs[DFII_PIX_DATA_SIZE*p+i])
working = 0;
if(MMPTR(dfii_pix_rddata_addr[p]+4*(i+DFII_PIX_DATA_SIZE/2)) != prs[DFII_PIX_DATA_SIZE*p+i+DFII_PIX_DATA_SIZE/2])
working = 0;
}
if(!working)
break;
delay++;
if(delay >= ERR_DDRPHY_DELAY)
break;
ddrphy_rdly_dq_inc_write(1);
}
delay_max = delay;
printf("%d:%02d-%02d ", DFII_PIX_DATA_SIZE/2-i-1, delay_min, delay_max);
/* Set delay to the middle */
ddrphy_rdly_dq_rst_write(1);
for(j=0;j<(delay_min+delay_max)/2;j++)
ddrphy_rdly_dq_inc_write(1);
}
/* Precharge */
dfii_pi0_address_write(0);
dfii_pi0_baddress_write(0);
command_p0(DFII_COMMAND_RAS|DFII_COMMAND_WE|DFII_COMMAND_CS);
cdelay(15);
printf("completed\n");
}
