[U-Boot-Users] [PATCH 1/2] ppc4xx: use common denali core defines and data eye search code for PMC440

Matthias Fuchs
2008-01-02T15:48:34Z

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
---
board/esd/pmc440/sdram.c | 342 +---------------------------------------------
1 files changed, 4 insertions(+), 338 deletions(-)

diff --git a/board/esd/pmc440/sdram.c b/board/esd/pmc440/sdram.c
index 78e2cb4..7f92d37 100644
--- a/board/esd/pmc440/sdram.c
+++ b/board/esd/pmc440/sdram.c
@@ -33,343 +33,9 @@
#include <asm/io.h>
#include <ppc440.h>

-#include "sdram.h"
+extern int denali_wait_for_dlllock(void);
+extern void denali_core_search_data_eye(void);

-#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@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
@@ -428,14 +94,14 @@ 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);
--
1.5.3