board/netstal/hcu5/sdram.c - github/trini/u-boot - Gitiles

 /*
  * (C) Copyright 2007
  * Niklaus Giger (Niklaus.Giger@netstal.com)
  * (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
  * 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 <asm/mmu.h>
 #include <ppc440.h>

 void hcu_led_set(u32 value);
 void dcbz_area(u32 start_address, u32 num_bytes);
 void dflush(void);

 #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    */

 #define DDR0_01_INT_MASK_MASK             0x000000FF
 #define DDR0_00_INT_ACK_ALL               0x7F000000
 #define DDR0_01_INT_MASK_ALL_ON           0x000000FF
 #define DDR0_01_INT_MASK_ALL_OFF          0x00000000

 #define DDR0_17_DLLLOCKREG_MASK           0x00010000 /* Read only */
 #define DDR0_17_DLLLOCKREG_UNLOCKED       0x00000000
 #define DDR0_17_DLLLOCKREG_LOCKED         0x00010000

 #define DDR0_22                         0x16
 /* ECC */
 #define DDR0_22_CTRL_RAW_MASK             0x03000000
 #define DDR0_22_CTRL_RAW_ECC_DISABLE      0x00000000 /* ECC not enabled */
 #define DDR0_22_CTRL_RAW_ECC_CHECK_ONLY   0x01000000 /* ECC no correction */
 #define DDR0_22_CTRL_RAW_NO_ECC_RAM       0x02000000 /* Not a ECC RAM*/
 #define DDR0_22_CTRL_RAW_ECC_ENABLE       0x03000000 /* ECC correcting on */
 #define DDR0_03_CASLAT_DECODE(n)            ((((unsigned long)(n))>>16)&0x7)

 #define ECC_RAM				0x03267F0B
 #define NO_ECC_RAM			0x00267F0B

 #define HCU_HW_SDRAM_CONFIG_MASK	0x7

 #define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE
 	/* disable caching on DDR2 */

 void program_tlb(u32 phys_addr, u32 virt_addr, u32 size, u32 tlb_word2_i_value);

 void board_add_ram_info(int use_default)
 {
 	PPC4xx_SYS_INFO board_cfg;
 	u32 val;

 	mfsdram(DDR0_22, val);
 	val &= DDR0_22_CTRL_RAW_MASK;
 	switch (val) {
 	case DDR0_22_CTRL_RAW_ECC_DISABLE:
 		puts(" (ECC disabled");
 		break;
 	case DDR0_22_CTRL_RAW_ECC_CHECK_ONLY:
 		puts(" (ECC check only");
 		break;
 	case DDR0_22_CTRL_RAW_NO_ECC_RAM:
 		puts(" (no ECC ram");
 		break;
 	case DDR0_22_CTRL_RAW_ECC_ENABLE:
 		puts(" (ECC enabled");
 		break;
 	}

 	get_sys_info(&board_cfg);
 	printf(", %d MHz", (board_cfg.freqPLB * 2) / 1000000);

 	mfsdram(DDR0_03, val);
 	val = DDR0_03_CASLAT_DECODE(val);
 	printf(", CL%d)", val);
 }

 /*--------------------------------------------------------------------
  * 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;
 }

 /***********************************************************************
  *
  * sdram_panic -- Panic if we cannot configure the sdram correctly
  *
  ************************************************************************/
 void sdram_panic(const char *reason)
 {
 	printf("\n%s: reason %s",  __FUNCTION__,  reason);
 	hcu_led_set(0xff);
 	while (1) {
 	}
 	/* Never return */
 }

 #ifdef CONFIG_DDR_ECC
 static void blank_string(int size)
 {
 	int i;

 	for (i=0; i<size; i++)
 		putc('\b');
 	for (i=0; i<size; i++)
 		putc(' ');
 	for (i=0; i<size; i++)
 		putc('\b');
 }
 /*---------------------------------------------------------------------------+
  * program_ecc.
  *---------------------------------------------------------------------------*/
 static void program_ecc(unsigned long start_address, unsigned long num_bytes)
 {
 	u32 val;
 	char str[] = "ECC generation -";
 #if defined(CONFIG_PRAM)
 	u32 *magic;

 	/* Check whether vxWorks is using EDR logging, if yes zero */
 	/* also PostMortem and user reserved memory */
 	magic = (u32 *)in_be32((u32 *)(start_address + num_bytes -
 				       (CONFIG_PRAM*1024) + sizeof(u32)));

 	debug("\n%s:  CONFIG_PRAM %d kB magic 0x%x 0x%p -> 0x%x\n", __FUNCTION__,
 	       CONFIG_PRAM,
 	       start_address + num_bytes - (CONFIG_PRAM*1024) + sizeof(u32),
 	       magic, in_be32(magic));
 	if (in_be32(magic) == 0xbeefbabe)
 		num_bytes -= (CONFIG_PRAM*1024) - PM_RESERVED_MEM;
 #endif

 	sync();
 	eieio();

 	puts(str);

 	/* ECC bit set method for cached memory */
 	/* Fast method, no noticeable delay */
 	dcbz_area(start_address, num_bytes);
 	dflush();
 	blank_string(strlen(str));

 	/* Clear error status */
 	mfsdram(DDR0_00, val);
 	mtsdram(DDR0_00, val | DDR0_00_INT_ACK_ALL);

 	/*
 	 * Clear possible ECC errors
 	 * If not done, then we could get an interrupt later on when
 	 * exceptions are enabled.
 	 */
 	mtspr(mcsr, mfspr(mcsr));

 	/* Set 'int_mask' parameter to functionnal value */
 	mfsdram(DDR0_01, val);
 	mtsdram(DDR0_01, ((val &~ DDR0_01_INT_MASK_MASK) |
 			  DDR0_01_INT_MASK_ALL_OFF));

 	return;
 }
 #endif


 /***********************************************************************
  *
  * initdram -- 440EPx's DDR controller is a DENALI Core
  *
  ************************************************************************/
 long int initdram (int board_type)
 {
 	unsigned int dram_size = 0;

 	mtsdram(DDR0_02, 0x00000000);

 	/* Values must be kept in sync with Excel-table <<A0001492.>> ! */
 	mtsdram(DDR0_00, 0x0000190A);
 	mtsdram(DDR0_01, 0x01000000);
 	mtsdram(DDR0_03, 0x02030602);
 	mtsdram(DDR0_04, 0x0A020200);
 	mtsdram(DDR0_05, 0x02020307);
 	switch (in_be16((u16 *)HCU_HW_VERSION_REGISTER) & HCU_HW_SDRAM_CONFIG_MASK) {
 	case 1:
 		dram_size = 256 * 1024 * 1024 ;
 		mtsdram(DDR0_06, 0x0102C812);  /* 256MB RAM */
 		mtsdram(DDR0_11, 0x0014C800);  /* 256MB RAM */
 		mtsdram(DDR0_43, 0x030A0200);  /* 256MB RAM */
 		break;
 	case 0:
 	default:
 		dram_size = 128 * 1024 * 1024 ;
 		mtsdram(DDR0_06, 0x0102C80D);  /* 128MB RAM */
 		mtsdram(DDR0_11, 0x000FC800);  /* 128MB RAM */
 		mtsdram(DDR0_43, 0x030A0300);  /* 128MB RAM */
 		break;
 	}
 	mtsdram(DDR0_07, 0x00090100);

 	/*
 	 * TCPD=200 cycles of clock input is required to lock the DLL.
 	 * CKE must be HIGH the entire time.mtsdram(DDR0_08, 0x02C80001);
 	 */
 	mtsdram(DDR0_08, 0x02C80001);
 	mtsdram(DDR0_09, 0x00011D5F);
 	mtsdram(DDR0_10, 0x00000100);
 	mtsdram(DDR0_12, 0x00000003);
 	mtsdram(DDR0_14, 0x00000000);
 	mtsdram(DDR0_17, 0x1D000000);
 	mtsdram(DDR0_18, 0x1D1D1D1D);
 	mtsdram(DDR0_19, 0x1D1D1D1D);
 	mtsdram(DDR0_20, 0x0B0B0B0B);
 	mtsdram(DDR0_21, 0x0B0B0B0B);
 #ifdef CONFIG_DDR_ECC
 	mtsdram(DDR0_22, ECC_RAM);
 #else
 	mtsdram(DDR0_22, NO_ECC_RAM);
 #endif

 	mtsdram(DDR0_23, 0x00000000);
 	mtsdram(DDR0_24, 0x01020001);
 	mtsdram(DDR0_26, 0x2D930517);
 	mtsdram(DDR0_27, 0x00008236);
 	mtsdram(DDR0_28, 0x00000000);
 	mtsdram(DDR0_31, 0x00000000);
 	mtsdram(DDR0_42, 0x01000006);
 	mtsdram(DDR0_44, 0x00000003);
 	mtsdram(DDR0_02, 0x00000001);
 	wait_for_dlllock();
 	mtsdram(DDR0_00, 0x40000000);  /* Zero init bit */

 	/*
 	 * Program tlb entries for this size (dynamic)
 	 */
 	remove_tlb(CFG_SDRAM_BASE, 256 << 20);
 	program_tlb(0, 0, dram_size, TLB_WORD2_W_ENABLE | TLB_WORD2_I_ENABLE);

 	/*
 	 * Setup 2nd TLB with same physical address but different virtual
 	 * address with cache enabled. This is done for fast ECC generation.
 	 */
 	program_tlb(0, CFG_DDR_CACHED_ADDR, dram_size, 0);

 #ifdef CONFIG_DDR_ECC
 	/*
 	 * If ECC is enabled, initialize the parity bits.
 	 */
 	program_ecc(CFG_DDR_CACHED_ADDR, dram_size);
 #endif

 	return (dram_size);
 }
	/*
	* (C) Copyright 2007
	* Niklaus Giger (Niklaus.Giger@netstal.com)
	* (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
	* 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 <asm/mmu.h>
	#include <ppc440.h>

	void hcu_led_set(u32 value);
	void dcbz_area(u32 start_address, u32 num_bytes);
	void dflush(void);

	#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 */

	#define DDR0_01_INT_MASK_MASK 0x000000FF
	#define DDR0_00_INT_ACK_ALL 0x7F000000
	#define DDR0_01_INT_MASK_ALL_ON 0x000000FF
	#define DDR0_01_INT_MASK_ALL_OFF 0x00000000

	#define DDR0_17_DLLLOCKREG_MASK 0x00010000 /* Read only */
	#define DDR0_17_DLLLOCKREG_UNLOCKED 0x00000000
	#define DDR0_17_DLLLOCKREG_LOCKED 0x00010000

	#define DDR0_22 0x16
	/* ECC */
	#define DDR0_22_CTRL_RAW_MASK 0x03000000
	#define DDR0_22_CTRL_RAW_ECC_DISABLE 0x00000000 /* ECC not enabled */
	#define DDR0_22_CTRL_RAW_ECC_CHECK_ONLY 0x01000000 /* ECC no correction */
	#define DDR0_22_CTRL_RAW_NO_ECC_RAM 0x02000000 /* Not a ECC RAM*/
	#define DDR0_22_CTRL_RAW_ECC_ENABLE 0x03000000 /* ECC correcting on */
	#define DDR0_03_CASLAT_DECODE(n) ((((unsigned long)(n))>>16)&0x7)

	#define ECC_RAM 0x03267F0B
	#define NO_ECC_RAM 0x00267F0B

	#define HCU_HW_SDRAM_CONFIG_MASK 0x7

	#define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE
	/* disable caching on DDR2 */

	void program_tlb(u32 phys_addr, u32 virt_addr, u32 size, u32 tlb_word2_i_value);

	void board_add_ram_info(int use_default)
	{
	PPC4xx_SYS_INFO board_cfg;
	u32 val;

	mfsdram(DDR0_22, val);
	val &= DDR0_22_CTRL_RAW_MASK;
	switch (val) {
	case DDR0_22_CTRL_RAW_ECC_DISABLE:
	puts(" (ECC disabled");
	break;
	case DDR0_22_CTRL_RAW_ECC_CHECK_ONLY:
	puts(" (ECC check only");
	break;
	case DDR0_22_CTRL_RAW_NO_ECC_RAM:
	puts(" (no ECC ram");
	break;
	case DDR0_22_CTRL_RAW_ECC_ENABLE:
	puts(" (ECC enabled");
	break;
	}

	get_sys_info(&board_cfg);
	printf(", %d MHz", (board_cfg.freqPLB * 2) / 1000000);

	mfsdram(DDR0_03, val);
	val = DDR0_03_CASLAT_DECODE(val);
	printf(", CL%d)", val);
	}

	/*--------------------------------------------------------------------
	* 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;
	}

	/***********************************************************************
	*
	* sdram_panic -- Panic if we cannot configure the sdram correctly
	*
	************************************************************************/
	void sdram_panic(const char *reason)
	{
	printf("\n%s: reason %s", __FUNCTION__, reason);
	hcu_led_set(0xff);
	while (1) {
	}
	/* Never return */
	}

	#ifdef CONFIG_DDR_ECC
	static void blank_string(int size)
	{
	int i;

	for (i=0; i<size; i++)
	putc('\b');
	for (i=0; i<size; i++)
	putc(' ');
	for (i=0; i<size; i++)
	putc('\b');
	}
	/*---------------------------------------------------------------------------+
	* program_ecc.
	---------------------------------------------------------------------------/
	static void program_ecc(unsigned long start_address, unsigned long num_bytes)
	{
	u32 val;
	char str[] = "ECC generation -";
	#if defined(CONFIG_PRAM)
	u32 *magic;

	/* Check whether vxWorks is using EDR logging, if yes zero */
	/* also PostMortem and user reserved memory */
	magic = (u32 )in_be32((u32 )(start_address + num_bytes -
	(CONFIG_PRAM*1024) + sizeof(u32)));

	debug("\n%s: CONFIG_PRAM %d kB magic 0x%x 0x%p -> 0x%x\n", __FUNCTION__,
	CONFIG_PRAM,
	start_address + num_bytes - (CONFIG_PRAM*1024) + sizeof(u32),
	magic, in_be32(magic));
	if (in_be32(magic) == 0xbeefbabe)
	num_bytes -= (CONFIG_PRAM*1024) - PM_RESERVED_MEM;
	#endif

	sync();
	eieio();

	puts(str);

	/* ECC bit set method for cached memory */
	/* Fast method, no noticeable delay */
	dcbz_area(start_address, num_bytes);
	dflush();
	blank_string(strlen(str));

	/* Clear error status */
	mfsdram(DDR0_00, val);
	mtsdram(DDR0_00, val \| DDR0_00_INT_ACK_ALL);

	/*
	* Clear possible ECC errors
	* If not done, then we could get an interrupt later on when
	* exceptions are enabled.
	*/
	mtspr(mcsr, mfspr(mcsr));

	/* Set 'int_mask' parameter to functionnal value */
	mfsdram(DDR0_01, val);
	mtsdram(DDR0_01, ((val &~ DDR0_01_INT_MASK_MASK) \|
	DDR0_01_INT_MASK_ALL_OFF));

	return;
	}
	#endif


	/***********************************************************************
	*
	* initdram -- 440EPx's DDR controller is a DENALI Core
	*
	************************************************************************/
	long int initdram (int board_type)
	{
	unsigned int dram_size = 0;

	mtsdram(DDR0_02, 0x00000000);

	/* Values must be kept in sync with Excel-table <<A0001492.>> ! */
	mtsdram(DDR0_00, 0x0000190A);
	mtsdram(DDR0_01, 0x01000000);
	mtsdram(DDR0_03, 0x02030602);
	mtsdram(DDR0_04, 0x0A020200);
	mtsdram(DDR0_05, 0x02020307);
	switch (in_be16((u16 *)HCU_HW_VERSION_REGISTER) & HCU_HW_SDRAM_CONFIG_MASK) {
	case 1:
	dram_size = 256 * 1024 * 1024 ;
	mtsdram(DDR0_06, 0x0102C812); /* 256MB RAM */
	mtsdram(DDR0_11, 0x0014C800); /* 256MB RAM */
	mtsdram(DDR0_43, 0x030A0200); /* 256MB RAM */
	break;
	case 0:
	default:
	dram_size = 128 * 1024 * 1024 ;
	mtsdram(DDR0_06, 0x0102C80D); /* 128MB RAM */
	mtsdram(DDR0_11, 0x000FC800); /* 128MB RAM */
	mtsdram(DDR0_43, 0x030A0300); /* 128MB RAM */
	break;
	}
	mtsdram(DDR0_07, 0x00090100);

	/*
	* TCPD=200 cycles of clock input is required to lock the DLL.
	* CKE must be HIGH the entire time.mtsdram(DDR0_08, 0x02C80001);
	*/
	mtsdram(DDR0_08, 0x02C80001);
	mtsdram(DDR0_09, 0x00011D5F);
	mtsdram(DDR0_10, 0x00000100);
	mtsdram(DDR0_12, 0x00000003);
	mtsdram(DDR0_14, 0x00000000);
	mtsdram(DDR0_17, 0x1D000000);
	mtsdram(DDR0_18, 0x1D1D1D1D);
	mtsdram(DDR0_19, 0x1D1D1D1D);
	mtsdram(DDR0_20, 0x0B0B0B0B);
	mtsdram(DDR0_21, 0x0B0B0B0B);
	#ifdef CONFIG_DDR_ECC
	mtsdram(DDR0_22, ECC_RAM);
	#else
	mtsdram(DDR0_22, NO_ECC_RAM);
	#endif

	mtsdram(DDR0_23, 0x00000000);
	mtsdram(DDR0_24, 0x01020001);
	mtsdram(DDR0_26, 0x2D930517);
	mtsdram(DDR0_27, 0x00008236);
	mtsdram(DDR0_28, 0x00000000);
	mtsdram(DDR0_31, 0x00000000);
	mtsdram(DDR0_42, 0x01000006);
	mtsdram(DDR0_44, 0x00000003);
	mtsdram(DDR0_02, 0x00000001);
	wait_for_dlllock();
	mtsdram(DDR0_00, 0x40000000); /* Zero init bit */

	/*
	* Program tlb entries for this size (dynamic)
	*/
	remove_tlb(CFG_SDRAM_BASE, 256 << 20);
	program_tlb(0, 0, dram_size, TLB_WORD2_W_ENABLE \| TLB_WORD2_I_ENABLE);

	/*
	* Setup 2nd TLB with same physical address but different virtual
	* address with cache enabled. This is done for fast ECC generation.
	*/
	program_tlb(0, CFG_DDR_CACHED_ADDR, dram_size, 0);

	#ifdef CONFIG_DDR_ECC
	/*
	* If ECC is enabled, initialize the parity bits.
	*/
	program_ecc(CFG_DDR_CACHED_ADDR, dram_size);
	#endif

	return (dram_size);
	}