Signed-off-by: Larry Johnson lrj@acm.org --- diff --git a/board/amcc/sequoia/sdram.c b/board/amcc/sequoia/sdram.c index 78e2cb4..5e93f6c 100644 --- a/board/amcc/sequoia/sdram.c +++ b/board/amcc/sequoia/sdram.c @@ -33,343 +33,11 @@ #include <asm/io.h> #include <ppc440.h>
-#include "sdram.h" - -#if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL) || \ - defined(CONFIG_DDR_DATA_EYE) -/*-----------------------------------------------------------------------------+ - * wait_for_dlllock. - +----------------------------------------------------------------------------*/ -static int wait_for_dlllock(void) -{ - unsigned long val; - int wait = 0; - - /* -----------------------------------------------------------+ - * Wait for the DCC master delay line to finish calibration - * ----------------------------------------------------------*/ - mtdcr(ddrcfga, DDR0_17); - val = DDR0_17_DLLLOCKREG_UNLOCKED; - - while (wait != 0xffff) { - val = mfdcr(ddrcfgd); - if ((val & DDR0_17_DLLLOCKREG_MASK) == DDR0_17_DLLLOCKREG_LOCKED) - /* dlllockreg bit on */ - return 0; - else - wait++; - } - debug("0x%04x: DDR0_17 Value (dlllockreg bit): 0x%08x\n", wait, val); - debug("Waiting for dlllockreg bit to raise\n"); - - return -1; -} -#endif - -#if defined(CONFIG_DDR_DATA_EYE) /*-----------------------------------------------------------------------------+ - * wait_for_dram_init_complete. - +----------------------------------------------------------------------------*/ -int wait_for_dram_init_complete(void) -{ - unsigned long val; - int wait = 0; - - /* --------------------------------------------------------------+ - * Wait for 'DRAM initialization complete' bit in status register - * -------------------------------------------------------------*/ - mtdcr(ddrcfga, DDR0_00); - - while (wait != 0xffff) { - val = mfdcr(ddrcfgd); - if ((val & DDR0_00_INT_STATUS_BIT6) == DDR0_00_INT_STATUS_BIT6) - /* 'DRAM initialization complete' bit */ - return 0; - else - wait++; - } - - debug("DRAM initialization complete bit in status register did not rise\n"); - - return -1; -} - -#define NUM_TRIES 64 -#define NUM_READS 10 - -/*-----------------------------------------------------------------------------+ - * denali_core_search_data_eye. - +----------------------------------------------------------------------------*/ -void denali_core_search_data_eye(unsigned long memory_size) -{ - int k, j; - u32 val; - u32 wr_dqs_shift, dqs_out_shift, dll_dqs_delay_X; - u32 max_passing_cases = 0, wr_dqs_shift_with_max_passing_cases = 0; - u32 passing_cases = 0, dll_dqs_delay_X_sw_val = 0; - u32 dll_dqs_delay_X_start_window = 0, dll_dqs_delay_X_end_window = 0; - volatile u32 *ram_pointer; - u32 test[NUM_TRIES] = { - 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, - 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, - 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000, - 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000, - 0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555, - 0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555, - 0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA, - 0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA, - 0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A, - 0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A, - 0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5, - 0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5, - 0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA, - 0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA, - 0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55, - 0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55 }; - - ram_pointer = (volatile u32 *)(CFG_SDRAM_BASE); - - for (wr_dqs_shift = 64; wr_dqs_shift < 96; wr_dqs_shift++) { - /*for (wr_dqs_shift=1; wr_dqs_shift<96; wr_dqs_shift++) {*/ - - /* -----------------------------------------------------------+ - * De-assert 'start' parameter. - * ----------------------------------------------------------*/ - mtdcr(ddrcfga, DDR0_02); - val = (mfdcr(ddrcfgd) & ~DDR0_02_START_MASK) | DDR0_02_START_OFF; - mtdcr(ddrcfgd, val); - - /* -----------------------------------------------------------+ - * Set 'wr_dqs_shift' - * ----------------------------------------------------------*/ - mtdcr(ddrcfga, DDR0_09); - val = (mfdcr(ddrcfgd) & ~DDR0_09_WR_DQS_SHIFT_MASK) - | DDR0_09_WR_DQS_SHIFT_ENCODE(wr_dqs_shift); - mtdcr(ddrcfgd, val); - - /* -----------------------------------------------------------+ - * Set 'dqs_out_shift' = wr_dqs_shift + 32 - * ----------------------------------------------------------*/ - dqs_out_shift = wr_dqs_shift + 32; - mtdcr(ddrcfga, DDR0_22); - val = (mfdcr(ddrcfgd) & ~DDR0_22_DQS_OUT_SHIFT_MASK) - | DDR0_22_DQS_OUT_SHIFT_ENCODE(dqs_out_shift); - mtdcr(ddrcfgd, val); - - passing_cases = 0; - - for (dll_dqs_delay_X = 1; dll_dqs_delay_X < 64; dll_dqs_delay_X++) { - /*for (dll_dqs_delay_X=1; dll_dqs_delay_X<128; dll_dqs_delay_X++) {*/ - /* -----------------------------------------------------------+ - * Set 'dll_dqs_delay_X'. - * ----------------------------------------------------------*/ - /* dll_dqs_delay_0 */ - mtdcr(ddrcfga, DDR0_17); - val = (mfdcr(ddrcfgd) & ~DDR0_17_DLL_DQS_DELAY_0_MASK) - | DDR0_17_DLL_DQS_DELAY_0_ENCODE(dll_dqs_delay_X); - mtdcr(ddrcfgd, val); - /* dll_dqs_delay_1 to dll_dqs_delay_4 */ - mtdcr(ddrcfga, DDR0_18); - val = (mfdcr(ddrcfgd) & ~DDR0_18_DLL_DQS_DELAY_X_MASK) - | DDR0_18_DLL_DQS_DELAY_4_ENCODE(dll_dqs_delay_X) - | DDR0_18_DLL_DQS_DELAY_3_ENCODE(dll_dqs_delay_X) - | DDR0_18_DLL_DQS_DELAY_2_ENCODE(dll_dqs_delay_X) - | DDR0_18_DLL_DQS_DELAY_1_ENCODE(dll_dqs_delay_X); - mtdcr(ddrcfgd, val); - /* dll_dqs_delay_5 to dll_dqs_delay_8 */ - mtdcr(ddrcfga, DDR0_19); - val = (mfdcr(ddrcfgd) & ~DDR0_19_DLL_DQS_DELAY_X_MASK) - | DDR0_19_DLL_DQS_DELAY_8_ENCODE(dll_dqs_delay_X) - | DDR0_19_DLL_DQS_DELAY_7_ENCODE(dll_dqs_delay_X) - | DDR0_19_DLL_DQS_DELAY_6_ENCODE(dll_dqs_delay_X) - | DDR0_19_DLL_DQS_DELAY_5_ENCODE(dll_dqs_delay_X); - mtdcr(ddrcfgd, val); - - ppcMsync(); - ppcMbar(); - - /* -----------------------------------------------------------+ - * Assert 'start' parameter. - * ----------------------------------------------------------*/ - mtdcr(ddrcfga, DDR0_02); - val = (mfdcr(ddrcfgd) & ~DDR0_02_START_MASK) | DDR0_02_START_ON; - mtdcr(ddrcfgd, val); - - ppcMsync(); - ppcMbar(); - - /* -----------------------------------------------------------+ - * Wait for the DCC master delay line to finish calibration - * ----------------------------------------------------------*/ - if (wait_for_dlllock() != 0) { - printf("dlllock did not occur !!!\n"); - printf("denali_core_search_data_eye!!!\n"); - printf("wr_dqs_shift = %d - dll_dqs_delay_X = %d\n", - wr_dqs_shift, dll_dqs_delay_X); - hang(); - } - ppcMsync(); - ppcMbar(); - - if (wait_for_dram_init_complete() != 0) { - printf("dram init complete did not occur !!!\n"); - printf("denali_core_search_data_eye!!!\n"); - printf("wr_dqs_shift = %d - dll_dqs_delay_X = %d\n", - wr_dqs_shift, dll_dqs_delay_X); - hang(); - } - udelay(100); /* wait 100us to ensure init is really completed !!! */ - - /* write values */ - for (j=0; j<NUM_TRIES; j++) { - ram_pointer[j] = test[j]; - - /* clear any cache at ram location */ - __asm__("dcbf 0,%0": :"r" (&ram_pointer[j])); - } - - /* read values back */ - for (j=0; j<NUM_TRIES; j++) { - for (k=0; k<NUM_READS; k++) { - /* clear any cache at ram location */ - __asm__("dcbf 0,%0": :"r" (&ram_pointer[j])); - - if (ram_pointer[j] != test[j]) - break; - } - - /* read error */ - if (k != NUM_READS) - break; - } - - /* See if the dll_dqs_delay_X value passed.*/ - if (j < NUM_TRIES) { - /* Failed */ - passing_cases = 0; - /* break; */ - } else { - /* Passed */ - if (passing_cases == 0) - dll_dqs_delay_X_sw_val = dll_dqs_delay_X; - passing_cases++; - if (passing_cases >= max_passing_cases) { - max_passing_cases = passing_cases; - wr_dqs_shift_with_max_passing_cases = wr_dqs_shift; - dll_dqs_delay_X_start_window = dll_dqs_delay_X_sw_val; - dll_dqs_delay_X_end_window = dll_dqs_delay_X; - } - } - - /* -----------------------------------------------------------+ - * De-assert 'start' parameter. - * ----------------------------------------------------------*/ - mtdcr(ddrcfga, DDR0_02); - val = (mfdcr(ddrcfgd) & ~DDR0_02_START_MASK) | DDR0_02_START_OFF; - mtdcr(ddrcfgd, val); - - } /* for (dll_dqs_delay_X=0; dll_dqs_delay_X<128; dll_dqs_delay_X++) */ - - } /* for (wr_dqs_shift=0; wr_dqs_shift<96; wr_dqs_shift++) */ - - /* -----------------------------------------------------------+ - * Largest passing window is now detected. - * ----------------------------------------------------------*/ - - /* Compute dll_dqs_delay_X value */ - dll_dqs_delay_X = (dll_dqs_delay_X_end_window + dll_dqs_delay_X_start_window) / 2; - wr_dqs_shift = wr_dqs_shift_with_max_passing_cases; - - debug("DQS calibration - Window detected:\n"); - debug("max_passing_cases = %d\n", max_passing_cases); - debug("wr_dqs_shift = %d\n", wr_dqs_shift); - debug("dll_dqs_delay_X = %d\n", dll_dqs_delay_X); - debug("dll_dqs_delay_X window = %d - %d\n", - dll_dqs_delay_X_start_window, dll_dqs_delay_X_end_window); - - /* -----------------------------------------------------------+ - * De-assert 'start' parameter. - * ----------------------------------------------------------*/ - mtdcr(ddrcfga, DDR0_02); - val = (mfdcr(ddrcfgd) & ~DDR0_02_START_MASK) | DDR0_02_START_OFF; - mtdcr(ddrcfgd, val); - - /* -----------------------------------------------------------+ - * Set 'wr_dqs_shift' - * ----------------------------------------------------------*/ - mtdcr(ddrcfga, DDR0_09); - val = (mfdcr(ddrcfgd) & ~DDR0_09_WR_DQS_SHIFT_MASK) - | DDR0_09_WR_DQS_SHIFT_ENCODE(wr_dqs_shift); - mtdcr(ddrcfgd, val); - debug("DDR0_09=0x%08lx\n", val); - - /* -----------------------------------------------------------+ - * Set 'dqs_out_shift' = wr_dqs_shift + 32 - * ----------------------------------------------------------*/ - dqs_out_shift = wr_dqs_shift + 32; - mtdcr(ddrcfga, DDR0_22); - val = (mfdcr(ddrcfgd) & ~DDR0_22_DQS_OUT_SHIFT_MASK) - | DDR0_22_DQS_OUT_SHIFT_ENCODE(dqs_out_shift); - mtdcr(ddrcfgd, val); - debug("DDR0_22=0x%08lx\n", val); - - /* -----------------------------------------------------------+ - * Set 'dll_dqs_delay_X'. - * ----------------------------------------------------------*/ - /* dll_dqs_delay_0 */ - mtdcr(ddrcfga, DDR0_17); - val = (mfdcr(ddrcfgd) & ~DDR0_17_DLL_DQS_DELAY_0_MASK) - | DDR0_17_DLL_DQS_DELAY_0_ENCODE(dll_dqs_delay_X); - mtdcr(ddrcfgd, val); - debug("DDR0_17=0x%08lx\n", val); - - /* dll_dqs_delay_1 to dll_dqs_delay_4 */ - mtdcr(ddrcfga, DDR0_18); - val = (mfdcr(ddrcfgd) & ~DDR0_18_DLL_DQS_DELAY_X_MASK) - | DDR0_18_DLL_DQS_DELAY_4_ENCODE(dll_dqs_delay_X) - | DDR0_18_DLL_DQS_DELAY_3_ENCODE(dll_dqs_delay_X) - | DDR0_18_DLL_DQS_DELAY_2_ENCODE(dll_dqs_delay_X) - | DDR0_18_DLL_DQS_DELAY_1_ENCODE(dll_dqs_delay_X); - mtdcr(ddrcfgd, val); - debug("DDR0_18=0x%08lx\n", val); - - /* dll_dqs_delay_5 to dll_dqs_delay_8 */ - mtdcr(ddrcfga, DDR0_19); - val = (mfdcr(ddrcfgd) & ~DDR0_19_DLL_DQS_DELAY_X_MASK) - | DDR0_19_DLL_DQS_DELAY_8_ENCODE(dll_dqs_delay_X) - | DDR0_19_DLL_DQS_DELAY_7_ENCODE(dll_dqs_delay_X) - | DDR0_19_DLL_DQS_DELAY_6_ENCODE(dll_dqs_delay_X) - | DDR0_19_DLL_DQS_DELAY_5_ENCODE(dll_dqs_delay_X); - mtdcr(ddrcfgd, val); - debug("DDR0_19=0x%08lx\n", val); - - /* -----------------------------------------------------------+ - * Assert 'start' parameter. - * ----------------------------------------------------------*/ - mtdcr(ddrcfga, DDR0_02); - val = (mfdcr(ddrcfgd) & ~DDR0_02_START_MASK) | DDR0_02_START_ON; - mtdcr(ddrcfgd, val); - - ppcMsync(); - ppcMbar(); - - /* -----------------------------------------------------------+ - * Wait for the DCC master delay line to finish calibration - * ----------------------------------------------------------*/ - if (wait_for_dlllock() != 0) { - printf("dlllock did not occur !!!\n"); - hang(); - } - ppcMsync(); - ppcMbar(); - - if (wait_for_dram_init_complete() != 0) { - printf("dram init complete did not occur !!!\n"); - hang(); - } - udelay(100); /* wait 100us to ensure init is really completed !!! */ -} -#endif /* CONFIG_DDR_DATA_EYE */ + * Prototypes + *-----------------------------------------------------------------------------*/ +extern int denali_wait_for_dlllock(void); +extern void denali_core_search_data_eye(void);
#if defined(CONFIG_NAND_SPL) /* Using cpu/ppc4xx/speed.c to calculate the bus frequency is too big @@ -428,14 +96,14 @@ long int initdram (int board_type) mtsdram(DDR0_44, 0x00000003); mtsdram(DDR0_02, 0x00000001);
- wait_for_dlllock(); + denali_wait_for_dlllock(); #endif /* #ifndef CONFIG_NAND_U_BOOT */
#ifdef CONFIG_DDR_DATA_EYE /* -----------------------------------------------------------+ * Perform data eye search if requested. * ----------------------------------------------------------*/ - denali_core_search_data_eye(CFG_MBYTES_SDRAM << 20); + denali_core_search_data_eye(); #endif
return (CFG_MBYTES_SDRAM << 20);