Merge branch 'master' into hpc2

Conflicts:

	drivers/cfi_flash.c

The patch by Heiko Schocher <hs@pollux.denx.de> on Jan, 19, 2007
fixes cfi_driver bug for mpc7448hpc2 board. The default cfi_driver can support
mpc7448hpc2 board.

1 files changed, 357 insertions, 9 deletions

diff --git a/board/amcc/sequoia/sdram.c b/board/amcc/sequoia/sdram.c
index 53f728d..77f1438 100644
--- a/board/amcc/sequoia/sdram.c
+++ b/board/amcc/sequoia/sdram.c
@@ -1,5 +1,12 @@
 /*
  * (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
  * Stefan Roese, DENX Software Engineering, sr@denx.de.
  *
  * This program is free software; you can redistribute it and/or
@@ -18,10 +25,352 @@
  * 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 */
+
 /*************************************************************************
  *
  * initdram -- 440EPx's DDR controller is a DENALI Core
@@ -30,8 +379,6 @@
 long int initdram (int board_type)
 {
 #if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL)
-	volatile ulong val;
-
 	mtsdram(DDR0_02, 0x00000000);
 
 	mtsdram(DDR0_00, 0x0000190A);
@@ -64,14 +411,15 @@ long int initdram (int board_type)
 	mtsdram(DDR0_44, 0x00000005);
 	mtsdram(DDR0_02, 0x00000001);
 
-	/*
-	 * Wait for DCC master delay line to finish calibration
-	 */
-	mfsdram(DDR0_17, val);
-	while (((val >> 8) & 0x000007f) == 0) {
-		mfsdram(DDR0_17, val);
-	}
+	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);
 }