board/ebony/ebony.c - platform/external/u-boot - Gitiles

 /*
  *  Copyright (C) 2002 Scott McNutt <smcnutt@artesyncp.com>
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * 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
  */


 #include <common.h>
 #include "ebony.h"
 #include <asm/processor.h>
 #include <spd_sdram.h>

 #define BOOT_SMALL_FLASH	32	/* 00100000 */
 #define FLASH_ONBD_N		2	/* 00000010 */
 #define FLASH_SRAM_SEL		1	/* 00000001 */

 long int fixed_sdram (void);

 int board_early_init_f (void)
 {
 	uint reg;
 	unsigned char *fpga_base = (unsigned char *) CFG_FPGA_BASE;
 	unsigned char status;


 	/*--------------------------------------------------------------------
 	 * Setup the external bus controller/chip selects
 	 *-------------------------------------------------------------------*/
 	mtdcr (ebccfga, xbcfg);
 	reg = mfdcr (ebccfgd);
 	mtdcr (ebccfgd, reg | 0x04000000);	/* Set ATC */

 	mtebc (pb1ap, 0x02815480);	/* NVRAM/RTC */
 	mtebc (pb1cr, 0x48018000);	/* BA=0x480 1MB R/W 8-bit */
 	mtebc (pb7ap, 0x01015280);	/* FPGA registers */
 	mtebc (pb7cr, 0x48318000);	/* BA=0x483 1MB R/W 8-bit */

 	/* read FPGA_REG0  and set the bus controller */
 	status = *fpga_base;
 	if ((status & BOOT_SMALL_FLASH) && !(status & FLASH_ONBD_N)) {
 		mtebc (pb0ap, 0x9b015480);	/* FLASH/SRAM */
 		mtebc (pb0cr, 0xfff18000);	/* BAS=0xfff 1MB R/W 8-bit */
 		mtebc (pb2ap, 0x9b015480);	/* 4MB FLASH */
 		mtebc (pb2cr, 0xff858000);	/* BAS=0xff8 4MB R/W 8-bit */
 	} else {
 		mtebc (pb0ap, 0x9b015480);	/* 4MB FLASH */
 		mtebc (pb0cr, 0xffc58000);	/* BAS=0xffc 4MB R/W 8-bit */

 		/* set CS2 if FLASH_ONBD_N == 0 */
 		if (!(status & FLASH_ONBD_N)) {
 			mtebc (pb2ap, 0x9b015480);	/* FLASH/SRAM */
 			mtebc (pb2cr, 0xff818000);	/* BAS=0xff8 4MB R/W 8-bit */
 		}
 	}

 	/*--------------------------------------------------------------------
 	 * Setup the interrupt controller polarities, triggers, etc.
 	 *-------------------------------------------------------------------*/
 	mtdcr (uic0sr, 0xffffffff);	/* clear all */
 	mtdcr (uic0er, 0x00000000);	/* disable all */
 	mtdcr (uic0cr, 0x00000009);	/* SMI & UIC1 crit are critical */
 	mtdcr (uic0pr, 0xfffffe13);	/* per ref-board manual */
 	mtdcr (uic0tr, 0x01c00008);	/* per ref-board manual */
 	mtdcr (uic0vr, 0x00000001);	/* int31 highest, base=0x000 */
 	mtdcr (uic0sr, 0xffffffff);	/* clear all */

 	mtdcr (uic1sr, 0xffffffff);	/* clear all */
 	mtdcr (uic1er, 0x00000000);	/* disable all */
 	mtdcr (uic1cr, 0x00000000);	/* all non-critical */
 	mtdcr (uic1pr, 0xffffe0ff);	/* per ref-board manual */
 	mtdcr (uic1tr, 0x00ffc000);	/* per ref-board manual */
 	mtdcr (uic1vr, 0x00000001);	/* int31 highest, base=0x000 */
 	mtdcr (uic1sr, 0xffffffff);	/* clear all */

 	return 0;
 }


 int checkboard (void)
 {
 	sys_info_t sysinfo;

 	get_sys_info (&sysinfo);

 	printf ("Board: IBM 440GP Evaluation Board (Ebony)\n");
 	printf ("\tVCO: %lu MHz\n", sysinfo.freqVCOMhz / 1000000);
 	printf ("\tCPU: %lu MHz\n", sysinfo.freqProcessor / 1000000);
 	printf ("\tPLB: %lu MHz\n", sysinfo.freqPLB / 1000000);
 	printf ("\tOPB: %lu MHz\n", sysinfo.freqOPB / 1000000);
 	printf ("\tEPB: %lu MHz\n", sysinfo.freqEPB / 1000000);
 	return (0);
 }


 long int initdram (int board_type)
 {
 	long dram_size = 0;

 #if defined(CONFIG_SPD_EEPROM)
 	dram_size = spd_sdram (0);
 #else
 	dram_size = fixed_sdram ();
 #endif
 	return dram_size;
 }


 #if defined(CFG_DRAM_TEST)
 int testdram (void)
 {
 	uint *pstart = (uint *) 0x00000000;
 	uint *pend = (uint *) 0x08000000;
 	uint *p;

 	for (p = pstart; p < pend; p++)
 		*p = 0xaaaaaaaa;

 	for (p = pstart; p < pend; p++) {
 		if (*p != 0xaaaaaaaa) {
 			printf ("SDRAM test fails at: %08x\n", (uint) p);
 			return 1;
 		}
 	}

 	for (p = pstart; p < pend; p++)
 		*p = 0x55555555;

 	for (p = pstart; p < pend; p++) {
 		if (*p != 0x55555555) {
 			printf ("SDRAM test fails at: %08x\n", (uint) p);
 			return 1;
 		}
 	}
 	return 0;
 }
 #endif

 #if !defined(CONFIG_SPD_EEPROM)
 /*************************************************************************
  *  fixed sdram init -- doesn't use serial presence detect.
  *
  *  Assumes:    128 MB, non-ECC, non-registered
  *              PLB @ 133 MHz
  *
  ************************************************************************/
 long int fixed_sdram (void)
 {
 	uint reg;

 	/*--------------------------------------------------------------------
 	 * Setup some default
 	 *------------------------------------------------------------------*/
 	mtsdram (mem_uabba, 0x00000000);	/* ubba=0 (default)             */
 	mtsdram (mem_slio, 0x00000000);		/* rdre=0 wrre=0 rarw=0         */
 	mtsdram (mem_devopt, 0x00000000);	/* dll=0 ds=0 (normal)          */
 	mtsdram (mem_wddctr, 0x00000000);	/* wrcp=0 dcd=0                 */
 	mtsdram (mem_clktr, 0x40000000);	/* clkp=1 (90 deg wr) dcdt=0    */

 	/*--------------------------------------------------------------------
 	 * Setup for board-specific specific mem
 	 *------------------------------------------------------------------*/
 	/*
 	 * Following for CAS Latency = 2.5 @ 133 MHz PLB
 	 */
 	mtsdram (mem_b0cr, 0x000a4001);	/* SDBA=0x000 128MB, Mode 3, enabled */
 	mtsdram (mem_tr0, 0x410a4012);	/* WR=2  WD=1 CL=2.5 PA=3 CP=4 LD=2 */
 	/* RA=10 RD=3                       */
 	mtsdram (mem_tr1, 0x8080082f);	/* SS=T2 SL=STAGE 3 CD=1 CT=0x02f   */
 	mtsdram (mem_rtr, 0x08200000);	/* Rate 15.625 ns @ 133 MHz PLB     */
 	mtsdram (mem_cfg1, 0x00000000);	/* Self-refresh exit, disable PM    */
 	udelay (400);			/* Delay 200 usecs (min)            */

 	/*--------------------------------------------------------------------
 	 * Enable the controller, then wait for DCEN to complete
 	 *------------------------------------------------------------------*/
 	mtsdram (mem_cfg0, 0x86000000);	/* DCEN=1, PMUD=1, 64-bit           */
 	for (;;) {
 		mfsdram (mem_mcsts, reg);
 		if (reg & 0x80000000)
 			break;
 	}

 	return (128 * 1024 * 1024);	/* 128 MB                           */
 }
 #endif	/* !defined(CONFIG_SPD_EEPROM) */


 /*************************************************************************
  *  pci_pre_init
  *
  *  This routine is called just prior to registering the hose and gives
  *  the board the opportunity to check things. Returning a value of zero
  *  indicates that things are bad & PCI initialization should be aborted.
  *
  *	Different boards may wish to customize the pci controller structure
  *	(add regions, override default access routines, etc) or perform
  *	certain pre-initialization actions.
  *
  ************************************************************************/
 #if defined(CONFIG_PCI) && defined(CFG_PCI_PRE_INIT)
 int pci_pre_init(struct pci_controller * hose )
 {
     unsigned long strap;

 	/*--------------------------------------------------------------------------+
      *	The ebony board is always configured as the host & requires the
      *	PCI arbiter to be enabled.
 	 *--------------------------------------------------------------------------*/
     strap = mfdcr(cpc0_strp1);
     if( (strap & 0x00100000) == 0 ){
 	printf("PCI: CPC0_STRP1[PAE] not set.\n");
 	return 0;
     }

     return 1;
 }
 #endif /* defined(CONFIG_PCI) && defined(CFG_PCI_PRE_INIT) */

 /*************************************************************************
  *  pci_target_init
  *
  *	The bootstrap configuration provides default settings for the pci
  *	inbound map (PIM). But the bootstrap config choices are limited and
  *	may not be sufficient for a given board.
  *
  ************************************************************************/
 #if defined(CONFIG_PCI) && defined(CFG_PCI_TARGET_INIT)
 void pci_target_init(struct pci_controller * hose )
 {
 	DECLARE_GLOBAL_DATA_PTR;

 	/*--------------------------------------------------------------------------+
 	 * Disable everything
 	 *--------------------------------------------------------------------------*/
 	out32r( PCIX0_PIM0SA, 0 ); /* disable */
 	out32r( PCIX0_PIM1SA, 0 ); /* disable */
 	out32r( PCIX0_PIM2SA, 0 ); /* disable */
 	out32r( PCIX0_EROMBA, 0 ); /* disable expansion rom */

 	/*--------------------------------------------------------------------------+
 	 * Map all of SDRAM to PCI address 0x0000_0000. Note that the 440 strapping
      * options to not support sizes such as 128/256 MB.
 	 *--------------------------------------------------------------------------*/
 	out32r( PCIX0_PIM0LAL, CFG_SDRAM_BASE );
 	out32r( PCIX0_PIM0LAH, 0 );
 	out32r( PCIX0_PIM0SA, ~(gd->ram_size - 1) | 1 );

 	out32r( PCIX0_BAR0, 0 );

 	/*--------------------------------------------------------------------------+
 	 * Program the board's subsystem id/vendor id
 	 *--------------------------------------------------------------------------*/
     out16r( PCIX0_SBSYSVID, CFG_PCI_SUBSYS_VENDORID );
     out16r( PCIX0_SBSYSID, CFG_PCI_SUBSYS_DEVICEID );

 	out16r( PCIX0_CMD, in16r(PCIX0_CMD) | PCI_COMMAND_MEMORY );
 }
 #endif /* defined(CONFIG_PCI) && defined(CFG_PCI_TARGET_INIT) */


 /*************************************************************************
  *  is_pci_host
  *
  *	This routine is called to determine if a pci scan should be
  *	performed. With various hardware environments (especially cPCI and
  *	PPMC) it's insufficient to depend on the state of the arbiter enable
  *	bit in the strap register, or generic host/adapter assumptions.
  *
  *	Rather than hard-code a bad assumption in the general 440 code, the
  *	440 pci code requires the board to decide at runtime.
  *
  *	Return 0 for adapter mode, non-zero for host (monarch) mode.
  *
  *
  ************************************************************************/
 #if defined(CONFIG_PCI)
 int is_pci_host(struct pci_controller *hose)
 {
     /* The ebony board is always configured as host. */
     return(1);
 }
 #endif /* defined(CONFIG_PCI) */
	/*
	* Copyright (C) 2002 Scott McNutt <smcnutt@artesyncp.com>
	*
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* 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
	*/


	#include <common.h>
	#include "ebony.h"
	#include <asm/processor.h>
	#include <spd_sdram.h>

	#define BOOT_SMALL_FLASH 32 /* 00100000 */
	#define FLASH_ONBD_N 2 /* 00000010 */
	#define FLASH_SRAM_SEL 1 /* 00000001 */

	long int fixed_sdram (void);

	int board_early_init_f (void)
	{
	uint reg;
	unsigned char fpga_base = (unsigned char ) CFG_FPGA_BASE;
	unsigned char status;


	/*--------------------------------------------------------------------
	* Setup the external bus controller/chip selects
	-------------------------------------------------------------------/
	mtdcr (ebccfga, xbcfg);
	reg = mfdcr (ebccfgd);
	mtdcr (ebccfgd, reg \| 0x04000000); /* Set ATC */

	mtebc (pb1ap, 0x02815480); /* NVRAM/RTC */
	mtebc (pb1cr, 0x48018000); /* BA=0x480 1MB R/W 8-bit */
	mtebc (pb7ap, 0x01015280); /* FPGA registers */
	mtebc (pb7cr, 0x48318000); /* BA=0x483 1MB R/W 8-bit */

	/* read FPGA_REG0 and set the bus controller */
	status = *fpga_base;
	if ((status & BOOT_SMALL_FLASH) && !(status & FLASH_ONBD_N)) {
	mtebc (pb0ap, 0x9b015480); /* FLASH/SRAM */
	mtebc (pb0cr, 0xfff18000); /* BAS=0xfff 1MB R/W 8-bit */
	mtebc (pb2ap, 0x9b015480); /* 4MB FLASH */
	mtebc (pb2cr, 0xff858000); /* BAS=0xff8 4MB R/W 8-bit */
	} else {
	mtebc (pb0ap, 0x9b015480); /* 4MB FLASH */
	mtebc (pb0cr, 0xffc58000); /* BAS=0xffc 4MB R/W 8-bit */

	/* set CS2 if FLASH_ONBD_N == 0 */
	if (!(status & FLASH_ONBD_N)) {
	mtebc (pb2ap, 0x9b015480); /* FLASH/SRAM */
	mtebc (pb2cr, 0xff818000); /* BAS=0xff8 4MB R/W 8-bit */
	}
	}

	/*--------------------------------------------------------------------
	* Setup the interrupt controller polarities, triggers, etc.
	-------------------------------------------------------------------/
	mtdcr (uic0sr, 0xffffffff); /* clear all */
	mtdcr (uic0er, 0x00000000); /* disable all */
	mtdcr (uic0cr, 0x00000009); /* SMI & UIC1 crit are critical */
	mtdcr (uic0pr, 0xfffffe13); /* per ref-board manual */
	mtdcr (uic0tr, 0x01c00008); /* per ref-board manual */
	mtdcr (uic0vr, 0x00000001); /* int31 highest, base=0x000 */
	mtdcr (uic0sr, 0xffffffff); /* clear all */

	mtdcr (uic1sr, 0xffffffff); /* clear all */
	mtdcr (uic1er, 0x00000000); /* disable all */
	mtdcr (uic1cr, 0x00000000); /* all non-critical */
	mtdcr (uic1pr, 0xffffe0ff); /* per ref-board manual */
	mtdcr (uic1tr, 0x00ffc000); /* per ref-board manual */
	mtdcr (uic1vr, 0x00000001); /* int31 highest, base=0x000 */
	mtdcr (uic1sr, 0xffffffff); /* clear all */

	return 0;
	}


	int checkboard (void)
	{
	sys_info_t sysinfo;

	get_sys_info (&sysinfo);

	printf ("Board: IBM 440GP Evaluation Board (Ebony)\n");
	printf ("\tVCO: %lu MHz\n", sysinfo.freqVCOMhz / 1000000);
	printf ("\tCPU: %lu MHz\n", sysinfo.freqProcessor / 1000000);
	printf ("\tPLB: %lu MHz\n", sysinfo.freqPLB / 1000000);
	printf ("\tOPB: %lu MHz\n", sysinfo.freqOPB / 1000000);
	printf ("\tEPB: %lu MHz\n", sysinfo.freqEPB / 1000000);
	return (0);
	}


	long int initdram (int board_type)
	{
	long dram_size = 0;

	#if defined(CONFIG_SPD_EEPROM)
	dram_size = spd_sdram (0);
	#else
	dram_size = fixed_sdram ();
	#endif
	return dram_size;
	}


	#if defined(CFG_DRAM_TEST)
	int testdram (void)
	{
	uint pstart = (uint ) 0x00000000;
	uint pend = (uint ) 0x08000000;
	uint *p;

	for (p = pstart; p < pend; p++)
	*p = 0xaaaaaaaa;

	for (p = pstart; p < pend; p++) {
	if (*p != 0xaaaaaaaa) {
	printf ("SDRAM test fails at: %08x\n", (uint) p);
	return 1;
	}
	}

	for (p = pstart; p < pend; p++)
	*p = 0x55555555;

	for (p = pstart; p < pend; p++) {
	if (*p != 0x55555555) {
	printf ("SDRAM test fails at: %08x\n", (uint) p);
	return 1;
	}
	}
	return 0;
	}
	#endif

	#if !defined(CONFIG_SPD_EEPROM)
	/*************************************************************************
	* fixed sdram init -- doesn't use serial presence detect.
	*
	* Assumes: 128 MB, non-ECC, non-registered
	* PLB @ 133 MHz
	*
	************************************************************************/
	long int fixed_sdram (void)
	{
	uint reg;

	/*--------------------------------------------------------------------
	* Setup some default
	------------------------------------------------------------------/
	mtsdram (mem_uabba, 0x00000000); /* ubba=0 (default) */
	mtsdram (mem_slio, 0x00000000); /* rdre=0 wrre=0 rarw=0 */
	mtsdram (mem_devopt, 0x00000000); /* dll=0 ds=0 (normal) */
	mtsdram (mem_wddctr, 0x00000000); /* wrcp=0 dcd=0 */
	mtsdram (mem_clktr, 0x40000000); /* clkp=1 (90 deg wr) dcdt=0 */

	/*--------------------------------------------------------------------
	* Setup for board-specific specific mem
	------------------------------------------------------------------/
	/*
	* Following for CAS Latency = 2.5 @ 133 MHz PLB
	*/
	mtsdram (mem_b0cr, 0x000a4001); /* SDBA=0x000 128MB, Mode 3, enabled */
	mtsdram (mem_tr0, 0x410a4012); /* WR=2 WD=1 CL=2.5 PA=3 CP=4 LD=2 */
	/* RA=10 RD=3 */
	mtsdram (mem_tr1, 0x8080082f); /* SS=T2 SL=STAGE 3 CD=1 CT=0x02f */
	mtsdram (mem_rtr, 0x08200000); /* Rate 15.625 ns @ 133 MHz PLB */
	mtsdram (mem_cfg1, 0x00000000); /* Self-refresh exit, disable PM */
	udelay (400); /* Delay 200 usecs (min) */

	/*--------------------------------------------------------------------
	* Enable the controller, then wait for DCEN to complete
	------------------------------------------------------------------/
	mtsdram (mem_cfg0, 0x86000000); /* DCEN=1, PMUD=1, 64-bit */
	for (;;) {
	mfsdram (mem_mcsts, reg);
	if (reg & 0x80000000)
	break;
	}

	return (128 * 1024 * 1024); /* 128 MB */
	}
	#endif /* !defined(CONFIG_SPD_EEPROM) */


	/*************************************************************************
	* pci_pre_init
	*
	* This routine is called just prior to registering the hose and gives
	* the board the opportunity to check things. Returning a value of zero
	* indicates that things are bad & PCI initialization should be aborted.
	*
	* Different boards may wish to customize the pci controller structure
	* (add regions, override default access routines, etc) or perform
	* certain pre-initialization actions.
	*
	************************************************************************/
	#if defined(CONFIG_PCI) && defined(CFG_PCI_PRE_INIT)
	int pci_pre_init(struct pci_controller * hose )
	{
	unsigned long strap;

	/*--------------------------------------------------------------------------+
	* The ebony board is always configured as the host & requires the
	* PCI arbiter to be enabled.
	--------------------------------------------------------------------------/
	strap = mfdcr(cpc0_strp1);
	if( (strap & 0x00100000) == 0 ){
	printf("PCI: CPC0_STRP1[PAE] not set.\n");
	return 0;
	}

	return 1;
	}
	#endif /* defined(CONFIG_PCI) && defined(CFG_PCI_PRE_INIT) */

	/*************************************************************************
	* pci_target_init
	*
	* The bootstrap configuration provides default settings for the pci
	* inbound map (PIM). But the bootstrap config choices are limited and
	* may not be sufficient for a given board.
	*
	************************************************************************/
	#if defined(CONFIG_PCI) && defined(CFG_PCI_TARGET_INIT)
	void pci_target_init(struct pci_controller * hose )
	{
	DECLARE_GLOBAL_DATA_PTR;

	/*--------------------------------------------------------------------------+
	* Disable everything
	--------------------------------------------------------------------------/
	out32r( PCIX0_PIM0SA, 0 ); /* disable */
	out32r( PCIX0_PIM1SA, 0 ); /* disable */
	out32r( PCIX0_PIM2SA, 0 ); /* disable */
	out32r( PCIX0_EROMBA, 0 ); /* disable expansion rom */

	/*--------------------------------------------------------------------------+
	* Map all of SDRAM to PCI address 0x0000_0000. Note that the 440 strapping
	* options to not support sizes such as 128/256 MB.
	--------------------------------------------------------------------------/
	out32r( PCIX0_PIM0LAL, CFG_SDRAM_BASE );
	out32r( PCIX0_PIM0LAH, 0 );
	out32r( PCIX0_PIM0SA, ~(gd->ram_size - 1) \| 1 );

	out32r( PCIX0_BAR0, 0 );

	/*--------------------------------------------------------------------------+
	* Program the board's subsystem id/vendor id
	--------------------------------------------------------------------------/
	out16r( PCIX0_SBSYSVID, CFG_PCI_SUBSYS_VENDORID );
	out16r( PCIX0_SBSYSID, CFG_PCI_SUBSYS_DEVICEID );

	out16r( PCIX0_CMD, in16r(PCIX0_CMD) \| PCI_COMMAND_MEMORY );
	}
	#endif /* defined(CONFIG_PCI) && defined(CFG_PCI_TARGET_INIT) */


	/*************************************************************************
	* is_pci_host
	*
	* This routine is called to determine if a pci scan should be
	* performed. With various hardware environments (especially cPCI and
	* PPMC) it's insufficient to depend on the state of the arbiter enable
	* bit in the strap register, or generic host/adapter assumptions.
	*
	* Rather than hard-code a bad assumption in the general 440 code, the
	* 440 pci code requires the board to decide at runtime.
	*
	* Return 0 for adapter mode, non-zero for host (monarch) mode.
	*
	*
	************************************************************************/
	#if defined(CONFIG_PCI)
	int is_pci_host(struct pci_controller *hose)
	{
	/* The ebony board is always configured as host. */
	return(1);
	}
	#endif /* defined(CONFIG_PCI) */