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author | Jon Loeliger <jdl@freescale.com> | 2008-01-03 09:46:55 -0600 |
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committer | Jon Loeliger <jdl@freescale.com> | 2008-01-03 09:46:55 -0600 |
commit | 2c3536425d987bf079258973e2acebaaef3e16b6 (patch) | |
tree | 659d06dd33eca4888e1f6d01d046507b76dc2d27 /board/esd/pmc440/sdram.c | |
parent | f743931f9b4d4e15c9bdfe726bef033ea1f1402c (diff) | |
parent | ce37422d0002e10490e268392e0c4e3028e52cec (diff) | |
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Merge commit 'wd/master'
Diffstat (limited to 'board/esd/pmc440/sdram.c')
-rw-r--r-- | board/esd/pmc440/sdram.c | 442 |
1 files changed, 442 insertions, 0 deletions
diff --git a/board/esd/pmc440/sdram.c b/board/esd/pmc440/sdram.c new file mode 100644 index 0000000..78e2cb4 --- /dev/null +++ b/board/esd/pmc440/sdram.c @@ -0,0 +1,442 @@ +/* + * (C) Copyright 2006 + * Sylvie Gohl, AMCC/IBM, gohl.sylvie@fr.ibm.com + * Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com + * Thierry Roman, AMCC/IBM, thierry_roman@fr.ibm.com + * Alain Saurel, AMCC/IBM, alain.saurel@fr.ibm.com + * Robert Snyder, AMCC/IBM, rob.snyder@fr.ibm.com + * + * (C) Copyright 2006-2007 + * Stefan Roese, DENX Software Engineering, sr@denx.de. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* define DEBUG for debug output */ +#undef DEBUG + +#include <common.h> +#include <asm/processor.h> +#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 */ + +#if defined(CONFIG_NAND_SPL) +/* Using cpu/ppc4xx/speed.c to calculate the bus frequency is too big + * for the 4k NAND boot image so define bus_frequency to 133MHz here + * which is save for the refresh counter setup. + */ +#define get_bus_freq(val) 133000000 +#endif + +/************************************************************************* + * + * initdram -- 440EPx's DDR controller is a DENALI Core + * + ************************************************************************/ +long int initdram (int board_type) +{ +#if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL) +#if !defined(CONFIG_NAND_SPL) + ulong speed = get_bus_freq(0); +#else + ulong speed = 133333333; /* 133MHz is on the safe side */ +#endif + + mtsdram(DDR0_02, 0x00000000); + + mtsdram(DDR0_00, 0x0000190A); + mtsdram(DDR0_01, 0x01000000); + mtsdram(DDR0_03, 0x02030602); + mtsdram(DDR0_04, 0x0A020200); + mtsdram(DDR0_05, 0x02020308); + mtsdram(DDR0_06, 0x0102C812); + mtsdram(DDR0_07, 0x000D0100); + mtsdram(DDR0_08, 0x02430001); + mtsdram(DDR0_09, 0x00011D5F); + mtsdram(DDR0_10, 0x00000300); + mtsdram(DDR0_11, 0x0027C800); + mtsdram(DDR0_12, 0x00000003); + mtsdram(DDR0_14, 0x00000000); + mtsdram(DDR0_17, 0x19000000); + mtsdram(DDR0_18, 0x19191919); + mtsdram(DDR0_19, 0x19191919); + mtsdram(DDR0_20, 0x0B0B0B0B); + mtsdram(DDR0_21, 0x0B0B0B0B); + mtsdram(DDR0_22, 0x00267F0B); + mtsdram(DDR0_23, 0x00000000); + mtsdram(DDR0_24, 0x01010002); + if (speed > 133333334) + mtsdram(DDR0_26, 0x5B26050C); + else + mtsdram(DDR0_26, 0x5B260408); + mtsdram(DDR0_27, 0x0000682B); + mtsdram(DDR0_28, 0x00000000); + mtsdram(DDR0_31, 0x00000000); + mtsdram(DDR0_42, 0x01000006); + mtsdram(DDR0_43, 0x030A0200); + mtsdram(DDR0_44, 0x00000003); + mtsdram(DDR0_02, 0x00000001); + + 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); +#endif + + return (CFG_MBYTES_SDRAM << 20); +} |