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#include <common.h>
#include <asm/io.h>
#include <post.h>
#include <watchdog.h>
#if CONFIG_POST & CONFIG_SYS_POST_MEMORY
#define CLKIN 25000000
#define PATTERN1 0x5A5A5A5A
#define PATTERN2 0xAAAAAAAA
#define CCLK_NUM 4
#define SCLK_NUM 3
void post_out_buff(char *buff);
void post_init_pll(int mult, int div);
int post_init_sdram(int sclk);
void post_init_uart(int sclk);
const int pll[CCLK_NUM][SCLK_NUM][2] = {
{ {20, 4}, {20, 5}, {20, 10} }, /* CCLK = 500M */
{ {16, 4}, {16, 5}, {16, 8} }, /* CCLK = 400M */
{ {8, 2}, {8, 4}, {8, 5} }, /* CCLK = 200M */
{ {4, 1}, {4, 2}, {4, 4} } /* CCLK = 100M */
};
const char *const log[CCLK_NUM][SCLK_NUM] = {
{"CCLK-500MHz SCLK-125MHz: Writing...\0",
"CCLK-500MHz SCLK-100MHz: Writing...\0",
"CCLK-500MHz SCLK- 50MHz: Writing...\0",},
{"CCLK-400MHz SCLK-100MHz: Writing...\0",
"CCLK-400MHz SCLK- 80MHz: Writing...\0",
"CCLK-400MHz SCLK- 50MHz: Writing...\0",},
{"CCLK-200MHz SCLK-100MHz: Writing...\0",
"CCLK-200MHz SCLK- 50MHz: Writing...\0",
"CCLK-200MHz SCLK- 40MHz: Writing...\0",},
{"CCLK-100MHz SCLK-100MHz: Writing...\0",
"CCLK-100MHz SCLK- 50MHz: Writing...\0",
"CCLK-100MHz SCLK- 25MHz: Writing...\0",},
};
int memory_post_test(int flags)
{
int addr;
int m, n;
int sclk, sclk_temp;
int ret = 1;
sclk_temp = CLKIN / 1000000;
sclk_temp = sclk_temp * CONFIG_VCO_MULT;
for (sclk = 0; sclk_temp > 0; sclk++)
sclk_temp -= CONFIG_SCLK_DIV;
sclk = sclk * 1000000;
post_init_uart(sclk);
if (post_hotkeys_pressed() == 0)
return 0;
for (m = 0; m < CCLK_NUM; m++) {
for (n = 0; n < SCLK_NUM; n++) {
/* Calculate the sclk */
sclk_temp = CLKIN / 1000000;
sclk_temp = sclk_temp * pll[m][n][0];
for (sclk = 0; sclk_temp > 0; sclk++)
sclk_temp -= pll[m][n][1];
sclk = sclk * 1000000;
post_init_pll(pll[m][n][0], pll[m][n][1]);
post_init_sdram(sclk);
post_init_uart(sclk);
post_out_buff("\n\r\0");
post_out_buff(log[m][n]);
for (addr = 0x0; addr < CONFIG_SYS_MAX_RAM_SIZE; addr += 4)
*(unsigned long *)addr = PATTERN1;
post_out_buff("Reading...\0");
for (addr = 0x0; addr < CONFIG_SYS_MAX_RAM_SIZE; addr += 4) {
if ((*(unsigned long *)addr) != PATTERN1) {
post_out_buff("Error\n\r\0");
ret = 0;
}
}
post_out_buff("OK\n\r\0");
}
}
if (ret)
post_out_buff("memory POST passed\n\r\0");
else
post_out_buff("memory POST failed\n\r\0");
post_out_buff("\n\r\n\r\0");
return 1;
}
void post_init_uart(int sclk)
{
int divisor;
for (divisor = 0; sclk > 0; divisor++)
sclk -= 57600 * 16;
bfin_write_PORTF_FER(0x000F);
bfin_write_PORTH_FER(0xFFFF);
bfin_write_UART_GCTL(0x00);
bfin_write_UART_LCR(0x83);
SSYNC();
bfin_write_UART_DLL(divisor & 0xFF);
SSYNC();
bfin_write_UART_DLH((divisor >> 8) & 0xFF);
SSYNC();
bfin_write_UART_LCR(0x03);
SSYNC();
bfin_write_UART_GCTL(0x01);
SSYNC();
}
void post_out_buff(char *buff)
{
int i = 0;
for (i = 0; i < 0x80000; i++)
;
i = 0;
while ((buff[i] != '\0') && (i != 100)) {
while (!(bfin_read_pUART_LSR() & 0x20)) ;
bfin_write_UART_THR(buff[i]);
SSYNC();
i++;
}
for (i = 0; i < 0x80000; i++)
;
}
void post_init_pll(int mult, int div)
{
bfin_write_SIC_IWR(0x01);
bfin_write_PLL_CTL((mult << 9));
bfin_write_PLL_DIV(div);
asm("CLI R2;");
asm("IDLE;");
asm("STI R2;");
while (!(bfin_read_PLL_STAT() & 0x20)) ;
}
int post_init_sdram(int sclk)
{
int SDRAM_tRP, SDRAM_tRP_num, SDRAM_tRAS, SDRAM_tRAS_num, SDRAM_tRCD,
SDRAM_tWR;
int SDRAM_Tref, SDRAM_NRA, SDRAM_CL, SDRAM_SIZE, SDRAM_WIDTH,
mem_SDGCTL, mem_SDBCTL, mem_SDRRC;
if ((sclk > 119402985)) {
SDRAM_tRP = TRP_2;
SDRAM_tRP_num = 2;
SDRAM_tRAS = TRAS_7;
SDRAM_tRAS_num = 7;
SDRAM_tRCD = TRCD_2;
SDRAM_tWR = TWR_2;
} else if ((sclk > 104477612) && (sclk <= 119402985)) {
SDRAM_tRP = TRP_2;
SDRAM_tRP_num = 2;
SDRAM_tRAS = TRAS_6;
SDRAM_tRAS_num = 6;
SDRAM_tRCD = TRCD_2;
SDRAM_tWR = TWR_2;
} else if ((sclk > 89552239) && (sclk <= 104477612)) {
SDRAM_tRP = TRP_2;
SDRAM_tRP_num = 2;
SDRAM_tRAS = TRAS_5;
SDRAM_tRAS_num = 5;
SDRAM_tRCD = TRCD_2;
SDRAM_tWR = TWR_2;
} else if ((sclk > 74626866) && (sclk <= 89552239)) {
SDRAM_tRP = TRP_2;
SDRAM_tRP_num = 2;
SDRAM_tRAS = TRAS_4;
SDRAM_tRAS_num = 4;
SDRAM_tRCD = TRCD_2;
SDRAM_tWR = TWR_2;
} else if ((sclk > 66666667) && (sclk <= 74626866)) {
SDRAM_tRP = TRP_2;
SDRAM_tRP_num = 2;
SDRAM_tRAS = TRAS_3;
SDRAM_tRAS_num = 3;
SDRAM_tRCD = TRCD_2;
SDRAM_tWR = TWR_2;
} else if ((sclk > 59701493) && (sclk <= 66666667)) {
SDRAM_tRP = TRP_1;
SDRAM_tRP_num = 1;
SDRAM_tRAS = TRAS_4;
SDRAM_tRAS_num = 4;
SDRAM_tRCD = TRCD_1;
SDRAM_tWR = TWR_2;
} else if ((sclk > 44776119) && (sclk <= 59701493)) {
SDRAM_tRP = TRP_1;
SDRAM_tRP_num = 1;
SDRAM_tRAS = TRAS_3;
SDRAM_tRAS_num = 3;
SDRAM_tRCD = TRCD_1;
SDRAM_tWR = TWR_2;
} else if ((sclk > 29850746) && (sclk <= 44776119)) {
SDRAM_tRP = TRP_1;
SDRAM_tRP_num = 1;
SDRAM_tRAS = TRAS_2;
SDRAM_tRAS_num = 2;
SDRAM_tRCD = TRCD_1;
SDRAM_tWR = TWR_2;
} else if (sclk <= 29850746) {
SDRAM_tRP = TRP_1;
SDRAM_tRP_num = 1;
SDRAM_tRAS = TRAS_1;
SDRAM_tRAS_num = 1;
SDRAM_tRCD = TRCD_1;
SDRAM_tWR = TWR_2;
} else {
SDRAM_tRP = TRP_1;
SDRAM_tRP_num = 1;
SDRAM_tRAS = TRAS_1;
SDRAM_tRAS_num = 1;
SDRAM_tRCD = TRCD_1;
SDRAM_tWR = TWR_2;
}
/*SDRAM INFORMATION: */
SDRAM_Tref = 64; /* Refresh period in milliseconds */
SDRAM_NRA = 4096; /* Number of row addresses in SDRAM */
SDRAM_CL = CL_3; /* 2 */
SDRAM_SIZE = EBSZ_64;
SDRAM_WIDTH = EBCAW_10;
mem_SDBCTL = SDRAM_WIDTH | SDRAM_SIZE | EBE;
/* Equation from section 17 (p17-46) of BF533 HRM */
mem_SDRRC =
(((CONFIG_SCLK_HZ / 1000) * SDRAM_Tref) / SDRAM_NRA) -
(SDRAM_tRAS_num + SDRAM_tRP_num);
/* Enable SCLK Out */
mem_SDGCTL =
(SCTLE | SDRAM_CL | SDRAM_tRAS | SDRAM_tRP | SDRAM_tRCD | SDRAM_tWR
| PSS);
SSYNC();
bfin_write_EBIU_SDGCTL(bfin_write_EBIU_SDGCTL() | 0x1000000);
/* Set the SDRAM Refresh Rate control register based on SSCLK value */
bfin_write_EBIU_SDRRC(mem_SDRRC);
/* SDRAM Memory Bank Control Register */
bfin_write_EBIU_SDBCTL(mem_SDBCTL);
/* SDRAM Memory Global Control Register */
bfin_write_EBIU_SDGCTL(mem_SDGCTL);
SSYNC();
return mem_SDRRC;
}
#endif /* CONFIG_POST & CONFIG_SYS_POST_MEMORY */
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