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Diffstat (limited to 'board/esd/pmc440/sdram.c')
-rw-r--r--board/esd/pmc440/sdram.c442
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
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+++ 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);
+}
generated by cgit v1.1 at 2024-11-05 23:14:39 +0000