mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 13:56:30 +00:00
e05329516a
Now that there are no board-specific versions of "denali_core_search_data_eye()", the weak binding on the common version can be removed. Signed-off-by: Larry Johnson <lrj@acm.org>
389 lines
13 KiB
C
389 lines
13 KiB
C
/*
|
|
* cpu/ppc4xx/denali_data_eye.c
|
|
* Extracted from board/amcc/sequoia/sdram.c by Larry Johnson <lrj@acm.org>.
|
|
*
|
|
* (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 debugging output (obviously ;-)) */
|
|
#if 0
|
|
#define DEBUG
|
|
#endif
|
|
|
|
#include <common.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/io.h>
|
|
#include <ppc4xx.h>
|
|
|
|
#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
|
|
/*-----------------------------------------------------------------------------+
|
|
* denali_wait_for_dlllock.
|
|
+----------------------------------------------------------------------------*/
|
|
int denali_wait_for_dlllock(void)
|
|
{
|
|
u32 val;
|
|
int wait;
|
|
|
|
/* -----------------------------------------------------------+
|
|
* Wait for the DCC master delay line to finish calibration
|
|
* ----------------------------------------------------------*/
|
|
for (wait = 0; wait != 0xffff; ++wait) {
|
|
mfsdram(DDR0_17, val);
|
|
if (DDR0_17_DLLLOCKREG_DECODE(val)) {
|
|
/* dlllockreg bit on */
|
|
return 0;
|
|
}
|
|
}
|
|
debug("0x%04x: DDR0_17 Value (dlllockreg bit): 0x%08x\n", wait, val);
|
|
debug("Waiting for dlllockreg bit to raise\n");
|
|
return -1;
|
|
}
|
|
|
|
#if defined(CONFIG_DDR_DATA_EYE)
|
|
#define DDR_DCR_BASE 0x10
|
|
#define ddrcfga (DDR_DCR_BASE+0x0) /* DDR configuration address reg */
|
|
#define ddrcfgd (DDR_DCR_BASE+0x1) /* DDR configuration data reg */
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
* wait_for_dram_init_complete.
|
|
+----------------------------------------------------------------------------*/
|
|
static 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(void)
|
|
{
|
|
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);
|
|
/* clear any ECC errors */
|
|
mtdcr(ddrcfga, DDR0_00);
|
|
mtdcr(ddrcfgd,
|
|
mfdcr(ddrcfgd) | DDR0_00_INT_ACK_ENCODE(0x3C));
|
|
|
|
sync();
|
|
eieio();
|
|
|
|
/* -----------------------------------------------------------+
|
|
* Assert 'start' parameter.
|
|
* ----------------------------------------------------------*/
|
|
mtdcr(ddrcfga, DDR0_02);
|
|
val = (mfdcr(ddrcfgd) & ~DDR0_02_START_MASK) |
|
|
DDR0_02_START_ON;
|
|
mtdcr(ddrcfgd, val);
|
|
|
|
sync();
|
|
eieio();
|
|
|
|
/* -----------------------------------------------------------+
|
|
* Wait for the DCC master delay line to finish calibration
|
|
* ----------------------------------------------------------*/
|
|
if (denali_wait_for_dlllock() != 0) {
|
|
printf("dll lock 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();
|
|
}
|
|
sync();
|
|
eieio();
|
|
|
|
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. */
|
|
mtdcr(ddrcfga, DDR0_00);
|
|
if (j < NUM_TRIES
|
|
|| (DDR0_00_INT_STATUS_DECODE(mfdcr(ddrcfgd)) &
|
|
0x3F)) {
|
|
/* 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);
|
|
|
|
sync();
|
|
eieio();
|
|
|
|
/* -----------------------------------------------------------+
|
|
* Wait for the DCC master delay line to finish calibration
|
|
* ----------------------------------------------------------*/
|
|
if (denali_wait_for_dlllock() != 0) {
|
|
printf("dll lock did not occur !!!\n");
|
|
hang();
|
|
}
|
|
sync();
|
|
eieio();
|
|
|
|
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 /* defined(CONFIG_DDR_DATA_EYE) */
|
|
#endif /* defined(CONFIG_440EPX) || defined(CONFIG_440GRX) */
|