diff options
Diffstat (limited to 'qemu/roms/u-boot/board/bf537-stamp/post-memory.c')
| -rw-r--r-- | qemu/roms/u-boot/board/bf537-stamp/post-memory.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/board/bf537-stamp/post-memory.c b/qemu/roms/u-boot/board/bf537-stamp/post-memory.c new file mode 100644 index 000000000..2dea92fbe --- /dev/null +++ b/qemu/roms/u-boot/board/bf537-stamp/post-memory.c @@ -0,0 +1,257 @@ +#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 */ |