board/netstal/hcu5/hcu5.c - filogic/uboot - Gitiles

 /*
  *(C) Copyright 2005-2007 Netstal Maschinen AG
  *    Niklaus Giger (Niklaus.Giger@netstal.com)
  *
  *    This source code is free software; you can redistribute it
  *    and/or modify it in source code form 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 <asm/processor.h>
 #include <ppc440.h>
 #include <asm/mmu.h>
 #include <net.h>

 DECLARE_GLOBAL_DATA_PTR;

 void hcu_led_set(u32 value);

 extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS];

 #undef BOOTSTRAP_OPTION_A_ACTIVE

 #define SDR0_CP440		0x0180

 #define SYSTEM_RESET		0x30000000
 #define CHIP_RESET		0x20000000

 #define SDR0_ECID0		0x0080
 #define SDR0_ECID1		0x0081
 #define SDR0_ECID2		0x0082
 #define SDR0_ECID3		0x0083

 #define SYS_IO_ADDRESS		(CFG_CS_2 + 0x00e00000)
 #define SYS_SLOT_ADDRESS		(CFG_CPLD + 0x00400000)

 #define DEFAULT_ETH_ADDR  "ethaddr"
 /* ethaddr for first or etha1ddr for second ethernet */

 enum {
 	/* HW_GENERATION_HCU1 is no longer supported */
 	HW_GENERATION_HCU2  = 0x10,
 	HW_GENERATION_HCU3  = 0x10,
 	HW_GENERATION_HCU4  = 0x20,
 	HW_GENERATION_HCU5  = 0x30,
 	HW_GENERATION_MCU   = 0x08,
 	HW_GENERATION_MCU20 = 0x0a,
 	HW_GENERATION_MCU25 = 0x09,
 };


 /*
  * This function is run very early, out of flash, and before devices are
  * initialized. It is called by lib_ppc/board.c:board_init_f by virtue
  * of being in the init_sequence array.
  *
  * The SDRAM has been initialized already -- start.S:start called
  * init.S:init_sdram early on -- but it is not yet being used for
  * anything, not even stack. So be careful.
  */

 int board_early_init_f(void)
 {
 	u32 reg;

 #ifdef BOOTSTRAP_OPTION_A_ACTIVE
 	/* Booting with Bootstrap Option A
 	 * First boot, with CPR0_ICFG_RLI_MASK == 0
 	 * no we setup varios boot strapping register,
 	 * then we do reset the PPC440 using a chip reset
 	 * Unfortunately, we cannot use this option, as Nto1 is not set
 	 * with Bootstrap Option A and cannot be changed later on by SW
 	 * There are no other possible boostrap options with a 8 bit ROM
 	 * See Errata (Version 1.04) CHIP_9
 	 */

 	u32 cpr0icfg;
 	u32 dbcr;

 	mfcpr(CPR0_ICFG, cpr0icfg);
 	if (!(cpr0icfg & CPR0_ICFG_RLI_MASK)) {
 		mtcpr(CPR0_MALD,   0x02000000);
 		mtcpr(CPR0_OPBD,   0x02000000);
 	        mtcpr(CPR0_PERD,   0x05000000);  /* 1:5 */
 		mtcpr(CPR0_PLLC,   0x40000238);
 		mtcpr(CPR0_PLLD,   0x01010414);
 		mtcpr(CPR0_PRIMAD, 0x01000000);
 		mtcpr(CPR0_PRIMBD, 0x01000000);
 		mtcpr(CPR0_SPCID,  0x03000000);
 		mtsdr(SDR0_PFC0,   0x00003E00);  /* [CTE] = 0 */
 		mtsdr(SDR0_CP440,  0x0EAAEA02);  /* [Nto1] = 1*/
 		mtcpr(CPR0_ICFG,   cpr0icfg | CPR0_ICFG_RLI_MASK);

 		/*
 		 * Initiate system reset in debug control register DBCR
 		 */
 		dbcr = mfspr(dbcr0);
 		mtspr(dbcr0, dbcr | CHIP_RESET);
 	}
 	mtsdr(SDR0_CP440, 0x0EAAEA02);  /* [Nto1] = 1*/
 #endif
 	mtdcr(ebccfga, xbcfg);
 	mtdcr(ebccfgd, 0xb8400000);

 	/*--------------------------------------------------------------------
 	 * Setup the GPIO pins
 	 *-------------------------------------------------------------------*/
 	/* test-only: take GPIO init from pcs440ep ???? in config file */
 	out32(GPIO0_OR, 0x00000000);
 	out32(GPIO0_TCR, 0x7C2FF1CF);
 	out32(GPIO0_OSRL, 0x40055000);
 	out32(GPIO0_OSRH, 0x00000000);
 	out32(GPIO0_TSRL, 0x40055000);
 	out32(GPIO0_TSRH, 0x00000400);
 	out32(GPIO0_ISR1L, 0x40000000);
 	out32(GPIO0_ISR1H, 0x00000000);
 	out32(GPIO0_ISR2L, 0x00000000);
 	out32(GPIO0_ISR2H, 0x00000000);
 	out32(GPIO0_ISR3L, 0x00000000);
 	out32(GPIO0_ISR3H, 0x00000000);

 	out32(GPIO1_OR, 0x00000000);
 	out32(GPIO1_TCR, 0xC6007FFF);
 	out32(GPIO1_OSRL, 0x00140000);
 	out32(GPIO1_OSRH, 0x00000000);
 	out32(GPIO1_TSRL, 0x00000000);
 	out32(GPIO1_TSRH, 0x00000000);
 	out32(GPIO1_ISR1L, 0x05415555);
 	out32(GPIO1_ISR1H, 0x40000000);
 	out32(GPIO1_ISR2L, 0x00000000);
 	out32(GPIO1_ISR2H, 0x00000000);
 	out32(GPIO1_ISR3L, 0x00000000);
 	out32(GPIO1_ISR3H, 0x00000000);

 	/*--------------------------------------------------------------------
 	 * Setup the interrupt controller polarities, triggers, etc.
 	 *-------------------------------------------------------------------*/
 	mtdcr(uic0sr, 0xffffffff);	/* clear all */
 	mtdcr(uic0er, 0x00000000);	/* disable all */
 	mtdcr(uic0cr, 0x00000005);	/* ATI & UIC1 crit are critical */
 	mtdcr(uic0pr, 0xfffff7ff);	/* per ref-board manual */
 	mtdcr(uic0tr, 0x00000000);	/* per ref-board manual */
 	mtdcr(uic0vr, 0x00000000);	/* 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, 0xffffffff);	/* per ref-board manual */
 	mtdcr(uic1tr, 0x00000000);	/* per ref-board manual */
 	mtdcr(uic1vr, 0x00000000);	/* int31 highest, base=0x000 */
 	mtdcr(uic1sr, 0xffffffff);	/* clear all */

 	mtdcr(uic2sr, 0xffffffff);	/* clear all */
 	mtdcr(uic2er, 0x00000000);	/* disable all */
 	mtdcr(uic2cr, 0x00000000);	/* all non-critical */
 	mtdcr(uic2pr, 0xffffffff);	/* per ref-board manual */
 	mtdcr(uic2tr, 0x00000000);	/* per ref-board manual */
 	mtdcr(uic2vr, 0x00000000);	/* int31 highest, base=0x000 */
 	mtdcr(uic2sr, 0xffffffff);	/* clear all */
 	mtsdr(sdr_pfc0, 0x00003E00);	/* Pin function:  */
 	mtsdr(sdr_pfc1, 0x00848000);	/* Pin function: UART0 has 4 pins */

 	/* PCI arbiter enabled */
 	mfsdr(sdr_pci0, reg);
 	mtsdr(sdr_pci0, 0x80000000 | reg);

 	pci_pre_init(0);

 	/* setup BOOT FLASH */
 	mtsdr(SDR0_CUST0, 0xC0082350);

 	return 0;
 }

 #ifdef CONFIG_BOARD_PRE_INIT
 int board_pre_init(void)
 {
 	return board_early_init_f();
 }

 #endif

 int checkboard(void)
 {
 	unsigned int j;
 	u16 *hwVersReg    = (u16 *) HCU_HW_VERSION_REGISTER;
 	u16 *boardVersReg = (u16 *) HCU_CPLD_VERSION_REGISTER;
 	u16 generation = *boardVersReg & 0xf0;
 	u16 index      = *boardVersReg & 0x0f;
 	u32 ecid0, ecid1, ecid2, ecid3;

 	printf("Netstal Maschinen AG: ");
 	if (generation == HW_GENERATION_HCU3)
 		printf("HCU3: index %d", index);
 	else if (generation == HW_GENERATION_HCU4)
 		printf("HCU4: index %d", index);
 	else if (generation == HW_GENERATION_HCU5)
 		printf("HCU5: index %d", index);
 	printf(" HW 0x%02x\n", *hwVersReg & 0xff);
 	mfsdr(SDR0_ECID0, ecid0);
 	mfsdr(SDR0_ECID1, ecid1);
 	mfsdr(SDR0_ECID2, ecid2);
 	mfsdr(SDR0_ECID3, ecid3);

 	printf("Chip ID 0x%x 0x%x 0x%x 0x%x\n", ecid0, ecid1, ecid2, ecid3);
 	for (j = 0;j < 6; j++) {
 		hcu_led_set(1 << j);
 		udelay(200 * 1000);
 	}

 	return 0;
 }

 u32 hcu_led_get(void)
 {
 	return in16(SYS_IO_ADDRESS) & 0x3f;
 }

 /*---------------------------------------------------------------------------+
  * hcu_led_set  value to be placed into the LEDs (max 6 bit)
  *---------------------------------------------------------------------------*/
 void hcu_led_set(u32 value)
 {
 	out16(SYS_IO_ADDRESS, value);
 }

 /*---------------------------------------------------------------------------+
  * get_serial_number
  *---------------------------------------------------------------------------*/
 static u32 get_serial_number(void)
 {
 	u32 *serial = (u32 *)CFG_FLASH_BASE;

 	if (*serial == 0xffffffff)
 		return 0;

 	return *serial;
 }


 /*---------------------------------------------------------------------------+
  * hcu_get_slot
  *---------------------------------------------------------------------------*/
 u32 hcu_get_slot(void)
 {
 	u16 *slot = (u16 *)SYS_SLOT_ADDRESS;
 	return (*slot) & 0x7f;
 }


 /*---------------------------------------------------------------------------+
  * misc_init_r.
  *---------------------------------------------------------------------------*/
 int misc_init_r(void)
 {
 	char *s = getenv(DEFAULT_ETH_ADDR);
 	char *e;
 	int i;
 	u32 serial = get_serial_number();
 	unsigned long usb2d0cr = 0;
 	unsigned long usb2phy0cr, usb2h0cr = 0;
 	unsigned long sdr0_pfc1;

 	for (i = 0; i < 6; ++i) {
 		gd->bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
 		if (s)
 			s = (*e) ? e + 1 : e;
 	}

 	if (gd->bd->bi_enetaddr[3] == 0 &&
 	    gd->bd->bi_enetaddr[4] == 0 &&
 	    gd->bd->bi_enetaddr[5] == 0) {
 		char ethaddr[22];

 		/* Must be in sync with CONFIG_ETHADDR */
 		gd->bd->bi_enetaddr[0] = 0x00;
 		gd->bd->bi_enetaddr[1] = 0x60;
 		gd->bd->bi_enetaddr[2] = 0x13;
 		gd->bd->bi_enetaddr[3] = (serial >> 16) & 0xff;
 		gd->bd->bi_enetaddr[4] = (serial >>  8) & 0xff;
 		gd->bd->bi_enetaddr[5] = hcu_get_slot();
 		sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X\0",
 			gd->bd->bi_enetaddr[0], gd->bd->bi_enetaddr[1],
 			gd->bd->bi_enetaddr[2], gd->bd->bi_enetaddr[3],
 			gd->bd->bi_enetaddr[4], gd->bd->bi_enetaddr[5]) ;
 		printf("%s: Setting eth %s serial 0x%x\n",  __FUNCTION__,
 		       ethaddr, serial);
 		setenv(DEFAULT_ETH_ADDR, ethaddr);
 	}

 	/* IP-Adress update */
 	{
 		IPaddr_t ipaddr;
 		char *ipstring;

 		ipstring = getenv("ipaddr");
 		if (ipstring == 0)
 			ipaddr = string_to_ip("172.25.1.99");
 		else
 			ipaddr = string_to_ip(ipstring);
 		if ((ipaddr & 0xff) != (32 + hcu_get_slot())) {
 			char tmp[22];

 			ipaddr = (ipaddr & 0xffffff00) + 32 + hcu_get_slot();
 			ip_to_string (ipaddr, tmp);
 			printf("%s: enforce %s\n",  __FUNCTION__, tmp);
 			setenv("ipaddr", tmp);
 		}
 	}
 #ifdef CFG_ENV_IS_IN_FLASH
 	/* Monitor protection ON by default */
 	(void)flash_protect(FLAG_PROTECT_SET,
 			    -CFG_MONITOR_LEN,
 			    0xffffffff,
 			    &flash_info[0]);

 	/* Env protection ON by default */
 	(void)flash_protect(FLAG_PROTECT_SET,
 			    CFG_ENV_ADDR_REDUND,
 			    CFG_ENV_ADDR_REDUND + 2*CFG_ENV_SECT_SIZE - 1,
 			    &flash_info[0]);
 #endif

 	/*
 	 * USB stuff...
 	 */

 	/* SDR Setting */
 	mfsdr(SDR0_PFC1, sdr0_pfc1);
 	mfsdr(SDR0_USB2D0CR, usb2d0cr);
 	mfsdr(SDR0_USB2PHY0CR, usb2phy0cr);
 	mfsdr(SDR0_USB2H0CR, usb2h0cr);

 	usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_XOCLK_MASK;
 	usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_XOCLK_EXTERNAL;	/*0*/
 	usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_WDINT_MASK;
 	usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_WDINT_16BIT_30MHZ;	/*1*/
 	usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_DVBUS_MASK;
 	usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_DVBUS_PURDIS;		/*0*/
 	usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_DWNSTR_MASK;
 	usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_DWNSTR_HOST;		/*1*/
 	usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_UTMICN_MASK;
 	usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_UTMICN_HOST;		/*1*/

 	/* An 8-bit/60MHz interface is the only possible alternative
 	   when connecting the Device to the PHY */
 	usb2h0cr   = usb2h0cr &~SDR0_USB2H0CR_WDINT_MASK;
 	usb2h0cr   = usb2h0cr | SDR0_USB2H0CR_WDINT_16BIT_30MHZ;	/*1*/

 	/* To enable the USB 2.0 Device function through the UTMI interface */
 	usb2d0cr = usb2d0cr &~SDR0_USB2D0CR_USB2DEV_EBC_SEL_MASK;
 	usb2d0cr = usb2d0cr | SDR0_USB2D0CR_USB2DEV_SELECTION;		/*1*/

 	sdr0_pfc1 = sdr0_pfc1 &~SDR0_PFC1_UES_MASK;
 	sdr0_pfc1 = sdr0_pfc1 | SDR0_PFC1_UES_USB2D_SEL;		/*0*/

 	mtsdr(SDR0_PFC1, sdr0_pfc1);
 	mtsdr(SDR0_USB2D0CR, usb2d0cr);
 	mtsdr(SDR0_USB2PHY0CR, usb2phy0cr);
 	mtsdr(SDR0_USB2H0CR, usb2h0cr);

 	/*clear resets*/
 	udelay(1000);
 	mtsdr(SDR0_SRST1, 0x00000000);
 	udelay(1000);
 	mtsdr(SDR0_SRST0, 0x00000000);

 	printf("USB:   Host(int phy) Device(ext phy)\n");

 	return 0;
 }

 #if defined(CONFIG_PCI)
 /*************************************************************************
  *  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.
  *
  ************************************************************************/
 int pci_pre_init(struct pci_controller *hose)
 {
 	unsigned long addr;

 	/*-------------------------------------------------------------------+
 	 * As of errata version 0.4, CHIP_8: Incorrect Write to DDR SDRAM.
 	 * Workaround: Disable write pipelining to DDR SDRAM by setting
 	 * PLB0_ACR[WRP] = 0.
 	 *-------------------------------------------------------------------*/

 	/*-------------------------------------------------------------------+
 	  | Set priority for all PLB3 devices to 0.
 	  | Set PLB3 arbiter to fair mode.
 	  +-------------------------------------------------------------------*/
 	mfsdr(sdr_amp1, addr);
 	mtsdr(sdr_amp1, (addr & 0x000000FF) | 0x0000FF00);
 	addr = mfdcr(plb3_acr);
 	/* mtdcr(plb3_acr, addr & ~plb1_acr_wrp_mask); */  /* ngngng */
 	mtdcr(plb3_acr, addr | 0x80000000); /* Sequoia */

 	/*-------------------------------------------------------------------+
 	  | Set priority for all PLB4 devices to 0.
 	  +-------------------------------------------------------------------*/
 	mfsdr(sdr_amp0, addr);
 	mtsdr(sdr_amp0, (addr & 0x000000FF) | 0x0000FF00);
 	addr = mfdcr(plb4_acr) | 0xa0000000;	/* Was 0x8---- */
 	/* mtdcr(plb4_acr, addr & ~plb1_acr_wrp_mask); */  /* ngngng */
 	mtdcr(plb4_acr, addr);  /* Sequoia */

 	/*-------------------------------------------------------------------+
 	  | Set Nebula PLB4 arbiter to fair mode.
 	  +-------------------------------------------------------------------*/
 	/* Segment0 */
 	addr = (mfdcr(plb0_acr) & ~plb0_acr_ppm_mask) | plb0_acr_ppm_fair;
 	addr = (addr & ~plb0_acr_hbu_mask) | plb0_acr_hbu_enabled;
 	addr = (addr & ~plb0_acr_rdp_mask) | plb0_acr_rdp_4deep;
 	/* addr = (addr & ~plb0_acr_wrp_mask); */  /* ngngng */
 	addr = (addr & ~plb0_acr_wrp_mask) | plb0_acr_wrp_2deep; /* Sequoia */

 	/* mtdcr(plb0_acr, addr); */ /* Sequoia */
 	mtdcr(plb0_acr, 0);  /* PATCH HAB: WRITE PIPELINING OFF */

 	/* Segment1 */
 	addr = (mfdcr(plb1_acr) & ~plb1_acr_ppm_mask) | plb1_acr_ppm_fair;
 	addr = (addr & ~plb1_acr_hbu_mask) | plb1_acr_hbu_enabled;
 	addr = (addr & ~plb1_acr_rdp_mask) | plb1_acr_rdp_4deep;
 	addr = (addr & ~plb1_acr_wrp_mask) ;
 	/* mtdcr(plb1_acr, addr); */ /* Sequoia */
 	mtdcr(plb1_acr, 0);  /* PATCH HAB: WRITE PIPELINING OFF */

 	return 1;
 }

 /*************************************************************************
  *  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.
  *
  ************************************************************************/
 void pci_target_init(struct pci_controller *hose)
 {
 	/*-------------------------------------------------------------+
 	 * Set up Direct MMIO registers
 	 *-------------------------------------------------------------*/
 	/*-------------------------------------------------------------+
 	  | PowerPC440EPX PCI Master configuration.
 	  | Map one 1Gig range of PLB/processor addresses to PCI memory space.
 	  |   PLB address 0xA0000000-0xDFFFFFFF ==> PCI address
 	  |		  0xA0000000-0xDFFFFFFF
 	  |   Use byte reversed out routines to handle endianess.
 	  | Make this region non-prefetchable.
 	  +-------------------------------------------------------------*/
 	/* PMM0 Mask/Attribute - disabled b4 setting */
 	out32r(PCIX0_PMM0MA, 0x00000000);
 	out32r(PCIX0_PMM0LA, CFG_PCI_MEMBASE);	/* PMM0 Local Address */
 	/* PMM0 PCI Low Address */
 	out32r(PCIX0_PMM0PCILA, CFG_PCI_MEMBASE);
 	out32r(PCIX0_PMM0PCIHA, 0x00000000);	/* PMM0 PCI High Address */
 	/* 512M + No prefetching, and enable region */
 	out32r(PCIX0_PMM0MA, 0xE0000001);

 	/* PMM0 Mask/Attribute - disabled b4 setting */
 	out32r(PCIX0_PMM1MA, 0x00000000);
 	out32r(PCIX0_PMM1LA, CFG_PCI_MEMBASE2);	/* PMM0 Local Address */
 	/* PMM0 PCI Low Address */
 	out32r(PCIX0_PMM1PCILA, CFG_PCI_MEMBASE2);
 	out32r(PCIX0_PMM1PCIHA, 0x00000000);	/* PMM0 PCI High Address */
 	/* 512M + No prefetching, and enable region */
 	out32r(PCIX0_PMM1MA, 0xE0000001);

 	out32r(PCIX0_PTM1MS, 0x00000001);	/* Memory Size/Attribute */
 	out32r(PCIX0_PTM1LA, 0);	/* Local Addr. Reg */
 	out32r(PCIX0_PTM2MS, 0);	/* Memory Size/Attribute */
 	out32r(PCIX0_PTM2LA, 0);	/* Local Addr. Reg */

 	/*------------------------------------------------------------------+
 	 * Set up Configuration registers
 	 *------------------------------------------------------------------*/

 	/* Program the board's subsystem id/vendor id */
 	pci_write_config_word(0, PCI_SUBSYSTEM_VENDOR_ID,
 			      CFG_PCI_SUBSYS_VENDORID);
 	pci_write_config_word(0, PCI_SUBSYSTEM_ID, CFG_PCI_SUBSYS_ID);

 	/* Configure command register as bus master */
 	pci_write_config_word(0, PCI_COMMAND, PCI_COMMAND_MASTER);

 	/* 240nS PCI clock */
 	pci_write_config_word(0, PCI_LATENCY_TIMER, 1);

 	/* No error reporting */
 	pci_write_config_word(0, PCI_ERREN, 0);

 	pci_write_config_dword(0, PCI_BRDGOPT2, 0x00000101);
 }

 /*************************************************************************
  *  pci_master_init
  *
  ************************************************************************/
 void pci_master_init(struct pci_controller *hose)
 {
 	unsigned short temp_short;

 	/*---------------------------------------------------------------+
 	  | Write the PowerPC440 EP PCI Configuration regs.
 	  |   Enable PowerPC440 EP to be a master on the PCI bus (PMM).
 	  |   Enable PowerPC440 EP to act as a PCI memory target (PTM).
 	  +--------------------------------------------------------------*/
 	pci_read_config_word(0, PCI_COMMAND, &temp_short);
 	pci_write_config_word(0, PCI_COMMAND,
 			      temp_short | PCI_COMMAND_MASTER |
 			      PCI_COMMAND_MEMORY);
 }

 /*************************************************************************
  *  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.
  *
  *
  ************************************************************************/
 int is_pci_host(struct pci_controller *hose)
 {
 	return 1;
 }
 #endif	 /* defined(CONFIG_PCI) */
	/*
	*(C) Copyright 2005-2007 Netstal Maschinen AG
	* Niklaus Giger (Niklaus.Giger@netstal.com)
	*
	* This source code is free software; you can redistribute it
	* and/or modify it in source code form 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 <asm/processor.h>
	#include <ppc440.h>
	#include <asm/mmu.h>
	#include <net.h>

	DECLARE_GLOBAL_DATA_PTR;

	void hcu_led_set(u32 value);

	extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS];

	#undef BOOTSTRAP_OPTION_A_ACTIVE

	#define SDR0_CP440 0x0180

	#define SYSTEM_RESET 0x30000000
	#define CHIP_RESET 0x20000000

	#define SDR0_ECID0 0x0080
	#define SDR0_ECID1 0x0081
	#define SDR0_ECID2 0x0082
	#define SDR0_ECID3 0x0083

	#define SYS_IO_ADDRESS (CFG_CS_2 + 0x00e00000)
	#define SYS_SLOT_ADDRESS (CFG_CPLD + 0x00400000)

	#define DEFAULT_ETH_ADDR "ethaddr"
	/* ethaddr for first or etha1ddr for second ethernet */

	enum {
	/* HW_GENERATION_HCU1 is no longer supported */
	HW_GENERATION_HCU2 = 0x10,
	HW_GENERATION_HCU3 = 0x10,
	HW_GENERATION_HCU4 = 0x20,
	HW_GENERATION_HCU5 = 0x30,
	HW_GENERATION_MCU = 0x08,
	HW_GENERATION_MCU20 = 0x0a,
	HW_GENERATION_MCU25 = 0x09,
	};


	/*
	* This function is run very early, out of flash, and before devices are
	* initialized. It is called by lib_ppc/board.c:board_init_f by virtue
	* of being in the init_sequence array.
	*
	* The SDRAM has been initialized already -- start.S:start called
	* init.S:init_sdram early on -- but it is not yet being used for
	* anything, not even stack. So be careful.
	*/

	int board_early_init_f(void)
	{
	u32 reg;

	#ifdef BOOTSTRAP_OPTION_A_ACTIVE
	/* Booting with Bootstrap Option A
	* First boot, with CPR0_ICFG_RLI_MASK == 0
	* no we setup varios boot strapping register,
	* then we do reset the PPC440 using a chip reset
	* Unfortunately, we cannot use this option, as Nto1 is not set
	* with Bootstrap Option A and cannot be changed later on by SW
	* There are no other possible boostrap options with a 8 bit ROM
	* See Errata (Version 1.04) CHIP_9
	*/

	u32 cpr0icfg;
	u32 dbcr;

	mfcpr(CPR0_ICFG, cpr0icfg);
	if (!(cpr0icfg & CPR0_ICFG_RLI_MASK)) {
	mtcpr(CPR0_MALD, 0x02000000);
	mtcpr(CPR0_OPBD, 0x02000000);
	mtcpr(CPR0_PERD, 0x05000000); /* 1:5 */
	mtcpr(CPR0_PLLC, 0x40000238);
	mtcpr(CPR0_PLLD, 0x01010414);
	mtcpr(CPR0_PRIMAD, 0x01000000);
	mtcpr(CPR0_PRIMBD, 0x01000000);
	mtcpr(CPR0_SPCID, 0x03000000);
	mtsdr(SDR0_PFC0, 0x00003E00); /* [CTE] = 0 */
	mtsdr(SDR0_CP440, 0x0EAAEA02); /* [Nto1] = 1*/
	mtcpr(CPR0_ICFG, cpr0icfg \| CPR0_ICFG_RLI_MASK);

	/*
	* Initiate system reset in debug control register DBCR
	*/
	dbcr = mfspr(dbcr0);
	mtspr(dbcr0, dbcr \| CHIP_RESET);
	}
	mtsdr(SDR0_CP440, 0x0EAAEA02); /* [Nto1] = 1*/
	#endif
	mtdcr(ebccfga, xbcfg);
	mtdcr(ebccfgd, 0xb8400000);

	/*--------------------------------------------------------------------
	* Setup the GPIO pins
	-------------------------------------------------------------------/
	/* test-only: take GPIO init from pcs440ep ???? in config file */
	out32(GPIO0_OR, 0x00000000);
	out32(GPIO0_TCR, 0x7C2FF1CF);
	out32(GPIO0_OSRL, 0x40055000);
	out32(GPIO0_OSRH, 0x00000000);
	out32(GPIO0_TSRL, 0x40055000);
	out32(GPIO0_TSRH, 0x00000400);
	out32(GPIO0_ISR1L, 0x40000000);
	out32(GPIO0_ISR1H, 0x00000000);
	out32(GPIO0_ISR2L, 0x00000000);
	out32(GPIO0_ISR2H, 0x00000000);
	out32(GPIO0_ISR3L, 0x00000000);
	out32(GPIO0_ISR3H, 0x00000000);

	out32(GPIO1_OR, 0x00000000);
	out32(GPIO1_TCR, 0xC6007FFF);
	out32(GPIO1_OSRL, 0x00140000);
	out32(GPIO1_OSRH, 0x00000000);
	out32(GPIO1_TSRL, 0x00000000);
	out32(GPIO1_TSRH, 0x00000000);
	out32(GPIO1_ISR1L, 0x05415555);
	out32(GPIO1_ISR1H, 0x40000000);
	out32(GPIO1_ISR2L, 0x00000000);
	out32(GPIO1_ISR2H, 0x00000000);
	out32(GPIO1_ISR3L, 0x00000000);
	out32(GPIO1_ISR3H, 0x00000000);

	/*--------------------------------------------------------------------
	* Setup the interrupt controller polarities, triggers, etc.
	-------------------------------------------------------------------/
	mtdcr(uic0sr, 0xffffffff); /* clear all */
	mtdcr(uic0er, 0x00000000); /* disable all */
	mtdcr(uic0cr, 0x00000005); /* ATI & UIC1 crit are critical */
	mtdcr(uic0pr, 0xfffff7ff); /* per ref-board manual */
	mtdcr(uic0tr, 0x00000000); /* per ref-board manual */
	mtdcr(uic0vr, 0x00000000); /* 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, 0xffffffff); /* per ref-board manual */
	mtdcr(uic1tr, 0x00000000); /* per ref-board manual */
	mtdcr(uic1vr, 0x00000000); /* int31 highest, base=0x000 */
	mtdcr(uic1sr, 0xffffffff); /* clear all */

	mtdcr(uic2sr, 0xffffffff); /* clear all */
	mtdcr(uic2er, 0x00000000); /* disable all */
	mtdcr(uic2cr, 0x00000000); /* all non-critical */
	mtdcr(uic2pr, 0xffffffff); /* per ref-board manual */
	mtdcr(uic2tr, 0x00000000); /* per ref-board manual */
	mtdcr(uic2vr, 0x00000000); /* int31 highest, base=0x000 */
	mtdcr(uic2sr, 0xffffffff); /* clear all */
	mtsdr(sdr_pfc0, 0x00003E00); /* Pin function: */
	mtsdr(sdr_pfc1, 0x00848000); /* Pin function: UART0 has 4 pins */

	/* PCI arbiter enabled */
	mfsdr(sdr_pci0, reg);
	mtsdr(sdr_pci0, 0x80000000 \| reg);

	pci_pre_init(0);

	/* setup BOOT FLASH */
	mtsdr(SDR0_CUST0, 0xC0082350);

	return 0;
	}

	#ifdef CONFIG_BOARD_PRE_INIT
	int board_pre_init(void)
	{
	return board_early_init_f();
	}

	#endif

	int checkboard(void)
	{
	unsigned int j;
	u16 hwVersReg = (u16 ) HCU_HW_VERSION_REGISTER;
	u16 boardVersReg = (u16 ) HCU_CPLD_VERSION_REGISTER;
	u16 generation = *boardVersReg & 0xf0;
	u16 index = *boardVersReg & 0x0f;
	u32 ecid0, ecid1, ecid2, ecid3;

	printf("Netstal Maschinen AG: ");
	if (generation == HW_GENERATION_HCU3)
	printf("HCU3: index %d", index);
	else if (generation == HW_GENERATION_HCU4)
	printf("HCU4: index %d", index);
	else if (generation == HW_GENERATION_HCU5)
	printf("HCU5: index %d", index);
	printf(" HW 0x%02x\n", *hwVersReg & 0xff);
	mfsdr(SDR0_ECID0, ecid0);
	mfsdr(SDR0_ECID1, ecid1);
	mfsdr(SDR0_ECID2, ecid2);
	mfsdr(SDR0_ECID3, ecid3);

	printf("Chip ID 0x%x 0x%x 0x%x 0x%x\n", ecid0, ecid1, ecid2, ecid3);
	for (j = 0;j < 6; j++) {
	hcu_led_set(1 << j);
	udelay(200 * 1000);
	}

	return 0;
	}

	u32 hcu_led_get(void)
	{
	return in16(SYS_IO_ADDRESS) & 0x3f;
	}

	/*---------------------------------------------------------------------------+
	* hcu_led_set value to be placed into the LEDs (max 6 bit)
	---------------------------------------------------------------------------/
	void hcu_led_set(u32 value)
	{
	out16(SYS_IO_ADDRESS, value);
	}

	/*---------------------------------------------------------------------------+
	* get_serial_number
	---------------------------------------------------------------------------/
	static u32 get_serial_number(void)
	{
	u32 serial = (u32 )CFG_FLASH_BASE;

	if (*serial == 0xffffffff)
	return 0;

	return *serial;
	}


	/*---------------------------------------------------------------------------+
	* hcu_get_slot
	---------------------------------------------------------------------------/
	u32 hcu_get_slot(void)
	{
	u16 slot = (u16 )SYS_SLOT_ADDRESS;
	return (*slot) & 0x7f;
	}


	/*---------------------------------------------------------------------------+
	* misc_init_r.
	---------------------------------------------------------------------------/
	int misc_init_r(void)
	{
	char *s = getenv(DEFAULT_ETH_ADDR);
	char *e;
	int i;
	u32 serial = get_serial_number();
	unsigned long usb2d0cr = 0;
	unsigned long usb2phy0cr, usb2h0cr = 0;
	unsigned long sdr0_pfc1;

	for (i = 0; i < 6; ++i) {
	gd->bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
	if (s)
	s = (*e) ? e + 1 : e;
	}

	if (gd->bd->bi_enetaddr[3] == 0 &&
	gd->bd->bi_enetaddr[4] == 0 &&
	gd->bd->bi_enetaddr[5] == 0) {
	char ethaddr[22];

	/* Must be in sync with CONFIG_ETHADDR */
	gd->bd->bi_enetaddr[0] = 0x00;
	gd->bd->bi_enetaddr[1] = 0x60;
	gd->bd->bi_enetaddr[2] = 0x13;
	gd->bd->bi_enetaddr[3] = (serial >> 16) & 0xff;
	gd->bd->bi_enetaddr[4] = (serial >> 8) & 0xff;
	gd->bd->bi_enetaddr[5] = hcu_get_slot();
	sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X\0",
	gd->bd->bi_enetaddr[0], gd->bd->bi_enetaddr[1],
	gd->bd->bi_enetaddr[2], gd->bd->bi_enetaddr[3],
	gd->bd->bi_enetaddr[4], gd->bd->bi_enetaddr[5]) ;
	printf("%s: Setting eth %s serial 0x%x\n", __FUNCTION__,
	ethaddr, serial);
	setenv(DEFAULT_ETH_ADDR, ethaddr);
	}

	/* IP-Adress update */
	{
	IPaddr_t ipaddr;
	char *ipstring;

	ipstring = getenv("ipaddr");
	if (ipstring == 0)
	ipaddr = string_to_ip("172.25.1.99");
	else
	ipaddr = string_to_ip(ipstring);
	if ((ipaddr & 0xff) != (32 + hcu_get_slot())) {
	char tmp[22];

	ipaddr = (ipaddr & 0xffffff00) + 32 + hcu_get_slot();
	ip_to_string (ipaddr, tmp);
	printf("%s: enforce %s\n", __FUNCTION__, tmp);
	setenv("ipaddr", tmp);
	}
	}
	#ifdef CFG_ENV_IS_IN_FLASH
	/* Monitor protection ON by default */
	(void)flash_protect(FLAG_PROTECT_SET,
	-CFG_MONITOR_LEN,
	0xffffffff,
	&flash_info[0]);

	/* Env protection ON by default */
	(void)flash_protect(FLAG_PROTECT_SET,
	CFG_ENV_ADDR_REDUND,
	CFG_ENV_ADDR_REDUND + 2*CFG_ENV_SECT_SIZE - 1,
	&flash_info[0]);
	#endif

	/*
	* USB stuff...
	*/

	/* SDR Setting */
	mfsdr(SDR0_PFC1, sdr0_pfc1);
	mfsdr(SDR0_USB2D0CR, usb2d0cr);
	mfsdr(SDR0_USB2PHY0CR, usb2phy0cr);
	mfsdr(SDR0_USB2H0CR, usb2h0cr);

	usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_XOCLK_MASK;
	usb2phy0cr = usb2phy0cr \| SDR0_USB2PHY0CR_XOCLK_EXTERNAL; /0/
	usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_WDINT_MASK;
	usb2phy0cr = usb2phy0cr \| SDR0_USB2PHY0CR_WDINT_16BIT_30MHZ; /1/
	usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_DVBUS_MASK;
	usb2phy0cr = usb2phy0cr \| SDR0_USB2PHY0CR_DVBUS_PURDIS; /0/
	usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_DWNSTR_MASK;
	usb2phy0cr = usb2phy0cr \| SDR0_USB2PHY0CR_DWNSTR_HOST; /1/
	usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_UTMICN_MASK;
	usb2phy0cr = usb2phy0cr \| SDR0_USB2PHY0CR_UTMICN_HOST; /1/

	/* An 8-bit/60MHz interface is the only possible alternative
	when connecting the Device to the PHY */
	usb2h0cr = usb2h0cr &~SDR0_USB2H0CR_WDINT_MASK;
	usb2h0cr = usb2h0cr \| SDR0_USB2H0CR_WDINT_16BIT_30MHZ; /1/

	/* To enable the USB 2.0 Device function through the UTMI interface */
	usb2d0cr = usb2d0cr &~SDR0_USB2D0CR_USB2DEV_EBC_SEL_MASK;
	usb2d0cr = usb2d0cr \| SDR0_USB2D0CR_USB2DEV_SELECTION; /1/

	sdr0_pfc1 = sdr0_pfc1 &~SDR0_PFC1_UES_MASK;
	sdr0_pfc1 = sdr0_pfc1 \| SDR0_PFC1_UES_USB2D_SEL; /0/

	mtsdr(SDR0_PFC1, sdr0_pfc1);
	mtsdr(SDR0_USB2D0CR, usb2d0cr);
	mtsdr(SDR0_USB2PHY0CR, usb2phy0cr);
	mtsdr(SDR0_USB2H0CR, usb2h0cr);

	/clear resets/
	udelay(1000);
	mtsdr(SDR0_SRST1, 0x00000000);
	udelay(1000);
	mtsdr(SDR0_SRST0, 0x00000000);

	printf("USB: Host(int phy) Device(ext phy)\n");

	return 0;
	}

	#if defined(CONFIG_PCI)
	/*************************************************************************
	* 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.
	*
	************************************************************************/
	int pci_pre_init(struct pci_controller *hose)
	{
	unsigned long addr;

	/*-------------------------------------------------------------------+
	* As of errata version 0.4, CHIP_8: Incorrect Write to DDR SDRAM.
	* Workaround: Disable write pipelining to DDR SDRAM by setting
	* PLB0_ACR[WRP] = 0.
	-------------------------------------------------------------------/

	/*-------------------------------------------------------------------+
	\| Set priority for all PLB3 devices to 0.
	\| Set PLB3 arbiter to fair mode.
	+-------------------------------------------------------------------*/
	mfsdr(sdr_amp1, addr);
	mtsdr(sdr_amp1, (addr & 0x000000FF) \| 0x0000FF00);
	addr = mfdcr(plb3_acr);
	/* mtdcr(plb3_acr, addr & ~plb1_acr_wrp_mask); / / ngngng */
	mtdcr(plb3_acr, addr \| 0x80000000); /* Sequoia */

	/*-------------------------------------------------------------------+
	\| Set priority for all PLB4 devices to 0.
	+-------------------------------------------------------------------*/
	mfsdr(sdr_amp0, addr);
	mtsdr(sdr_amp0, (addr & 0x000000FF) \| 0x0000FF00);
	addr = mfdcr(plb4_acr) \| 0xa0000000; /* Was 0x8---- */
	/* mtdcr(plb4_acr, addr & ~plb1_acr_wrp_mask); / / ngngng */
	mtdcr(plb4_acr, addr); /* Sequoia */

	/*-------------------------------------------------------------------+
	\| Set Nebula PLB4 arbiter to fair mode.
	+-------------------------------------------------------------------*/
	/* Segment0 */
	addr = (mfdcr(plb0_acr) & ~plb0_acr_ppm_mask) \| plb0_acr_ppm_fair;
	addr = (addr & ~plb0_acr_hbu_mask) \| plb0_acr_hbu_enabled;
	addr = (addr & ~plb0_acr_rdp_mask) \| plb0_acr_rdp_4deep;
	/* addr = (addr & ~plb0_acr_wrp_mask); / / ngngng */
	addr = (addr & ~plb0_acr_wrp_mask) \| plb0_acr_wrp_2deep; /* Sequoia */

	/* mtdcr(plb0_acr, addr); / / Sequoia */
	mtdcr(plb0_acr, 0); /* PATCH HAB: WRITE PIPELINING OFF */

	/* Segment1 */
	addr = (mfdcr(plb1_acr) & ~plb1_acr_ppm_mask) \| plb1_acr_ppm_fair;
	addr = (addr & ~plb1_acr_hbu_mask) \| plb1_acr_hbu_enabled;
	addr = (addr & ~plb1_acr_rdp_mask) \| plb1_acr_rdp_4deep;
	addr = (addr & ~plb1_acr_wrp_mask) ;
	/* mtdcr(plb1_acr, addr); / / Sequoia */
	mtdcr(plb1_acr, 0); /* PATCH HAB: WRITE PIPELINING OFF */

	return 1;
	}

	/*************************************************************************
	* 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.
	*
	************************************************************************/
	void pci_target_init(struct pci_controller *hose)
	{
	/*-------------------------------------------------------------+
	* Set up Direct MMIO registers
	-------------------------------------------------------------/
	/*-------------------------------------------------------------+
	\| PowerPC440EPX PCI Master configuration.
	\| Map one 1Gig range of PLB/processor addresses to PCI memory space.
	\| PLB address 0xA0000000-0xDFFFFFFF ==> PCI address
	\| 0xA0000000-0xDFFFFFFF
	\| Use byte reversed out routines to handle endianess.
	\| Make this region non-prefetchable.
	+-------------------------------------------------------------*/
	/* PMM0 Mask/Attribute - disabled b4 setting */
	out32r(PCIX0_PMM0MA, 0x00000000);
	out32r(PCIX0_PMM0LA, CFG_PCI_MEMBASE); /* PMM0 Local Address */
	/* PMM0 PCI Low Address */
	out32r(PCIX0_PMM0PCILA, CFG_PCI_MEMBASE);
	out32r(PCIX0_PMM0PCIHA, 0x00000000); /* PMM0 PCI High Address */
	/* 512M + No prefetching, and enable region */
	out32r(PCIX0_PMM0MA, 0xE0000001);

	/* PMM0 Mask/Attribute - disabled b4 setting */
	out32r(PCIX0_PMM1MA, 0x00000000);
	out32r(PCIX0_PMM1LA, CFG_PCI_MEMBASE2); /* PMM0 Local Address */
	/* PMM0 PCI Low Address */
	out32r(PCIX0_PMM1PCILA, CFG_PCI_MEMBASE2);
	out32r(PCIX0_PMM1PCIHA, 0x00000000); /* PMM0 PCI High Address */
	/* 512M + No prefetching, and enable region */
	out32r(PCIX0_PMM1MA, 0xE0000001);

	out32r(PCIX0_PTM1MS, 0x00000001); /* Memory Size/Attribute */
	out32r(PCIX0_PTM1LA, 0); /* Local Addr. Reg */
	out32r(PCIX0_PTM2MS, 0); /* Memory Size/Attribute */
	out32r(PCIX0_PTM2LA, 0); /* Local Addr. Reg */

	/*------------------------------------------------------------------+
	* Set up Configuration registers
	------------------------------------------------------------------/

	/* Program the board's subsystem id/vendor id */
	pci_write_config_word(0, PCI_SUBSYSTEM_VENDOR_ID,
	CFG_PCI_SUBSYS_VENDORID);
	pci_write_config_word(0, PCI_SUBSYSTEM_ID, CFG_PCI_SUBSYS_ID);

	/* Configure command register as bus master */
	pci_write_config_word(0, PCI_COMMAND, PCI_COMMAND_MASTER);

	/* 240nS PCI clock */
	pci_write_config_word(0, PCI_LATENCY_TIMER, 1);

	/* No error reporting */
	pci_write_config_word(0, PCI_ERREN, 0);

	pci_write_config_dword(0, PCI_BRDGOPT2, 0x00000101);
	}

	/*************************************************************************
	* pci_master_init
	*
	************************************************************************/
	void pci_master_init(struct pci_controller *hose)
	{
	unsigned short temp_short;

	/*---------------------------------------------------------------+
	\| Write the PowerPC440 EP PCI Configuration regs.
	\| Enable PowerPC440 EP to be a master on the PCI bus (PMM).
	\| Enable PowerPC440 EP to act as a PCI memory target (PTM).
	+--------------------------------------------------------------*/
	pci_read_config_word(0, PCI_COMMAND, &temp_short);
	pci_write_config_word(0, PCI_COMMAND,
	temp_short \| PCI_COMMAND_MASTER \|
	PCI_COMMAND_MEMORY);
	}

	/*************************************************************************
	* 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.
	*
	*
	************************************************************************/
	int is_pci_host(struct pci_controller *hose)
	{
	return 1;
	}
	#endif /* defined(CONFIG_PCI) */