sc3.c

uboot详细解读可用启动引导LINUX2.6内核

/*
 * (C) Copyright 2007
 * Heiko Schocher, DENX Software Engineering, <[e-mail]>.
 *
 * (C) Copyright 2003
 * Juergen Beisert, EuroDesign embedded technologies, [e-mail]
 * Derived from walnut.c
 *
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, [e-mail].
 *
 * 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
 *
 * $Log:$
 */

#include <common.h>
#include <asm/processor.h>
#include <asm/io.h>
#include "sc3.h"
#include <pci.h>
#include <i2c.h>
#include <malloc.h>

#undef writel
#undef writeb
#define writeb(b,addr) ((*(volatile u8 *) (addr)) = (b))
#define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))

/* write only register to configure things in our CPLD */
#define CPLD_CONTROL_1	0x79000102
#define CPLD_VERSION	0x79000103

#define	IS_CAMERON ((*(unsigned char *)(CPLD_VERSION)== 0x32) ? 1 : 0)

static struct pci_controller hose={0,};

/************************************************************
 * Standard definition
 ************************************************************/

/* CPC0_CR0        Function                                 ISA bus
	-  GPIO0
	-  GPIO1      -> Output: NAND-Command Latch Enable
	-  GPIO2      -> Output: NAND Address Latch Enable
	-  GPIO3      -> IRQ input                               ISA-IRQ #5 (through CPLD)
	-  GPIO4      -> Output: NAND-Chip Enable
	-  GPIO5      -> IRQ input                               ISA-IRQ#7 (through CPLD)
	-  GPIO6      -> IRQ input                               ISA-IRQ#9 (through CPLD)
	-  GPIO7      -> IRQ input                               ISA-IRQ#10 (through CPLD)
	-  GPIO8      -> IRQ input                               ISA-IRQ#11 (through CPLD)
	-  GPIO9      -> IRQ input                               ISA-IRQ#12 (through CPLD)
	- GPIO10/CS1# -> CS1# NAND                               ISA-CS#0
	- GPIO11/CS2# -> CS2# ISA emulation                      ISA-CS#1
	- GPIO12/CS3# -> CS3# 2nd Flash-Bank                     ISA-CS#2 or ISA-CS#7
	- GPIO13/CS4# -> CS4# USB HC or ISA emulation            ISA-CS#3
	- GPIO14/CS5# -> CS5# Boosted IDE access                 ISA-CS#4
	- GPIO15/CS6# -> CS6# ISA emulation                      ISA-CS#5
	- GPIO16/CS7# -> CS7# ISA emulation                      ISA-CS#6
	- GPIO17/IRQ0 -> GPIO, in, NAND-Ready/Busy# line         ISA-IRQ#3
	- GPIO18/IRQ1 -> IRQ input                               ISA-IRQ#14
	- GPIO19/IRQ2 -> IRQ input or USB                        ISA-IRQ#4
	- GPIO20/IRQ3 -> IRQ input                               PCI-IRQ#D
	- GPIO21/IRQ4 -> IRQ input                               PCI-IRQ#C
	- GPIO22/IRQ5 -> IRQ input                               PCI-IRQ#B
	- GPIO23/IRQ6 -> IRQ input                               PCI-IRQ#A
	- GPIO24 -> if GPIO output: 0=JTAG CPLD activ, 1=JTAG CPLD inactiv
*/
/*
| CPLD register: io-space at offset 0x102 (write only)
| 0
| 1
| 2 0=CS#4 USB CS#, 1=ISA or GP bus
| 3
| 4
| 5
| 6 1=enable faster IDE access
| 7
*/
#define USB_CHIP_ENABLE 0x04
#define IDE_BOOSTING 0x40

/* --------------- USB stuff ------------------------------------- */
#ifdef CONFIG_ISP1161_PRESENT
/**
 * initUsbHost- Initialize the Philips isp1161 HC part if present
 * @cpldConfig: Pointer to value in write only CPLD register
 *
 * Initialize the USB host controller if present and fills the
 * scratch register to inform the driver about used resources
 */

static void initUsbHost (unsigned char *cpldConfig)
{
	int i;
	unsigned long usbBase;
	/*
	 * Read back where init.S has located the USB chip
	 */
	mtdcr (0x012, 0x04);
	usbBase = mfdcr (0x013);
	if (!(usbBase & 0x18000))	/* enabled? */
		return;
	usbBase &= 0xFFF00000;

	/*
	 * to test for the USB controller enable using of CS#4 and DMA 3 for USB access
	 */
	writeb (*cpldConfig | USB_CHIP_ENABLE,CPLD_CONTROL_1);

	/*
	 * first check: is the controller assembled?
	 */
	hcWriteWord (usbBase, 0x5555, HcScratch);
	if (hcReadWord (usbBase, HcScratch) == 0x5555) {
		hcWriteWord (usbBase, 0xAAAA, HcScratch);
		if (hcReadWord (usbBase, HcScratch) == 0xAAAA) {
			if ((hcReadWord (usbBase, HcChipID) & 0xFF00) != 0x6100)
				return;	/* this is not our controller */
		/*
		 * try a software reset. This needs up to 10 seconds (see datasheet)
		 */
			hcWriteDWord (usbBase, 0x00000001, HcCommandStatus);
			for (i = 1000; i > 0; i--) {	/* loop up to 10 seconds */
				udelay (10);
				if (!(hcReadDWord (usbBase, HcCommandStatus) & 0x01))
					break;
			}

			if (!i)
				return;  /* the controller doesn't responding. Broken? */
		/*
		 * OK. USB controller is ready. Initialize it in such way the later driver
		 * can us it (without any knowing about specific implementation)
		 */
			hcWriteDWord (usbBase, 0x00000000, HcControl);
		/*
		 * disable all interrupt sources. Because we
		 * don't know where we come from (hard reset, cold start, soft reset...)
		 */
			hcWriteDWord (usbBase, 0x8000007D, HcInterruptDisable);
		/*
		 * our current setup hardware configuration
		 * - every port power supply can switched indepently
		 * - every port can signal overcurrent
		 * - every port is "outside" and the devices are removeable
		 */
			hcWriteDWord (usbBase, 0x32000902, HcRhDescriptorA);
			hcWriteDWord (usbBase, 0x00060000, HcRhDescriptorB);
		/*
		 * don't forget to switch off power supply of each port
		 * The later running driver can reenable them to find and use
		 * the (maybe) connected devices.
		 *
		 */
			hcWriteDWord (usbBase, 0x00000200, HcRhPortStatus1);
			hcWriteDWord (usbBase, 0x00000200, HcRhPortStatus2);
			hcWriteWord (usbBase, 0x0428, HcHardwareConfiguration);
			hcWriteWord (usbBase, 0x0040, HcDMAConfiguration);
			hcWriteWord (usbBase, 0x0000, HcuPInterruptEnable);
			hcWriteWord (usbBase, 0xA000 | (0x03 << 8) | 27, HcScratch);
		/*
		 * controller is present and usable
		 */
			*cpldConfig |= USB_CHIP_ENABLE;
		}
	}
}
#endif

#if defined(CONFIG_START_IDE)
int board_start_ide(void)
{
	if (IS_CAMERON) {
		puts ("no IDE on cameron board.\n");
		return 0;
	}
	return 1;
}
#endif

static int sc3_cameron_init (void)
{
	/* Set up the Memory Controller for the CAMERON version */
	mtebc (pb4ap, 0x01805940);
	mtebc (pb4cr, 0x7401a000);
	mtebc (pb5ap, 0x01805940);
	mtebc (pb5cr, 0x7401a000);
	mtebc (pb6ap, 0x0);
	mtebc (pb6cr, 0x0);
	mtebc (pb7ap, 0x0);
	mtebc (pb7cr, 0x0);
	return 0;
}

void sc3_read_eeprom (void)
{
	uchar i2c_buffer[18];

	i2c_read (0x50, 0x03, 1, i2c_buffer, 9);
	i2c_buffer[9] = 0;
	setenv ("serial#", (char *)i2c_buffer);

	/* read mac-address from eeprom */
	i2c_read (0x50, 0x11, 1, i2c_buffer, 15);
	i2c_buffer[17] = 0;
	i2c_buffer[16] = i2c_buffer[14];
	i2c_buffer[15] = i2c_buffer[13];
	i2c_buffer[14] = ':';
	i2c_buffer[13] = i2c_buffer[12];
	i2c_buffer[12] = i2c_buffer[11];
	i2c_buffer[11] = ':';
	i2c_buffer[8] = ':';
	i2c_buffer[5] = ':';
	i2c_buffer[2] = ':';
	setenv ("ethaddr", (char *)i2c_buffer);
}

int board_early_init_f (void)
{
	/* write only register to configure things in our CPLD */
	unsigned char cpldConfig_1=0x00;

/*-------------------------------------------------------------------------+
| Interrupt controller setup for the SolidCard III CPU card (plus Evaluation board).
|
| Note: IRQ 0  UART 0, active high; level sensitive
|       IRQ 1  UART 1, active high; level sensitive
|       IRQ 2  IIC, active high; level sensitive
|       IRQ 3  Ext. master, rising edge, edge sensitive
|       IRQ 4  PCI, active high; level sensitive
|       IRQ 5  DMA Channel 0, active high; level sensitive
|       IRQ 6  DMA Channel 1, active high; level sensitive
|       IRQ 7  DMA Channel 2, active high; level sensitive
|       IRQ 8  DMA Channel 3, active high; level sensitive
|       IRQ 9  Ethernet Wakeup, active high; level sensitive
|       IRQ 10 MAL System Error (SERR), active high; level sensitive
|       IRQ 11 MAL Tx End of Buffer, active high; level sensitive
|       IRQ 12 MAL Rx End of Buffer, active high; level sensitive
|       IRQ 13 MAL Tx Descriptor Error, active high; level sensitive
|       IRQ 14 MAL Rx Descriptor Error, active high; level sensitive
|       IRQ 15 Ethernet, active high; level sensitive
|       IRQ 16 External PCI SERR, active high; level sensitive
|       IRQ 17 ECC Correctable Error, active high; level sensitive
|       IRQ 18 PCI Power Management, active high; level sensitive
|
|       IRQ 19 (EXT IRQ7 405GPr only)
|       IRQ 20 (EXT IRQ8 405GPr only)
|       IRQ 21 (EXT IRQ9 405GPr only)
|       IRQ 22 (EXT IRQ10 405GPr only)
|       IRQ 23 (EXT IRQ11 405GPr only)
|       IRQ 24 (EXT IRQ12 405GPr only)
|
|       IRQ 25 (EXT IRQ 0) NAND-Flash R/B# (raising edge means flash is ready)
|       IRQ 26 (EXT IRQ 1) IDE0 interrupt (x86 = IRQ14). Active high (edge sensitive)
|       IRQ 27 (EXT IRQ 2) USB controller
|       IRQ 28 (EXT IRQ 3) INT D, VGA; active low; level sensitive
|       IRQ 29 (EXT IRQ 4) INT C, Ethernet; active low; level sensitive
|       IRQ 30 (EXT IRQ 5) INT B, PC104+ SLOT; active low; level sensitive
|       IRQ 31 (EXT IRQ 6) INT A, PC104+ SLOT; active low; level sensitive
|
| Direct Memory Access Controller Signal Polarities
|       DRQ0 active high (like ISA)
|       ACK0 active low (like ISA)
|       EOT0 active high (like ISA)
|       DRQ1 active high (like ISA)
|       ACK1 active low (like ISA)
|       EOT1 active high (like ISA)
|       DRQ2 active high (like ISA)
|       ACK2 active low (like ISA)
|       EOT2 active high (like ISA)
|       DRQ3 active high (like ISA)
|       ACK3 active low (like ISA)
|       EOT3 active high (like ISA)
|
+-------------------------------------------------------------------------*/

	writeb (cpldConfig_1, CPLD_CONTROL_1);	/* disable everything in CPLD */

	mtdcr (uicsr, 0xFFFFFFFF);    /* clear all ints */
	mtdcr (uicer, 0x00000000);    /* disable all ints */
	mtdcr (uiccr, 0x00000000);    /* set all to be non-critical */

	if (IS_CAMERON) {
		sc3_cameron_init();
		mtdcr (0x0B6, 0x18000000);
		mtdcr (uicpr, 0xFFFFFFF0);
		mtdcr (uictr, 0x10001030);
	} else {
		mtdcr (0x0B6, 0x0000000);
		mtdcr (uicpr, 0xFFFFFFE0);
		mtdcr (uictr, 0x10000020);
	}
	mtdcr (uicvcr, 0x00000001);   /* set vect base=0,INT0 highest priority */
	mtdcr (uicsr, 0xFFFFFFFF);    /* clear all ints */

	/* setup other implementation specific details */
	mtdcr (ecr, 0x60606000);

	mtdcr (cntrl1, 0x000042C0);

	if (IS_CAMERON) {
		mtdcr (cntrl0, 0x01380000);
		/* Setup the GPIOs */
		writel (0x08008000, 0xEF600700);	/* Output states */
		writel (0x00000000, 0xEF600718);	/* Open Drain control */
		writel (0x68098000, 0xEF600704);	/* Output control */
	} else {
		mtdcr (cntrl0,0x00080000);
		/* Setup the GPIOs */
		writel (0x08000000, 0xEF600700);	/* Output states */
		writel (0x14000000, 0xEF600718);	/* Open Drain control */
		writel (0x7C000000, 0xEF600704);	/* Output control */
	}

	/* Code decompression disabled */
	mtdcr (kiar, kconf);
	mtdcr (kidr, 0x2B);

	/* CPC0_ER: enable sleep mode of (currently) unused components */
	/* CPC0_FR: force unused components into sleep mode */
	mtdcr (cpmer, 0x3F800000);
	mtdcr (cpmfr, 0x14000000);

	/* set PLB priority */
	mtdcr (0x87, 0x08000000);

	/* --------------- DMA stuff ------------------------------------- */
	mtdcr (0x126, 0x49200000);

#ifndef IDE_USES_ISA_EMULATION
	cpldConfig_1 |= IDE_BOOSTING;	/* enable faster IDE */
	/* cpldConfig |= 0x01; */	/* enable 8.33MHz output, if *not* present on your baseboard */
	writeb (cpldConfig_1, CPLD_CONTROL_1);
#endif

#ifdef CONFIG_ISP1161_PRESENT
	initUsbHost (&cpldConfig_1);
	writeb (cpldConfig_1, CPLD_CONTROL_1);
#endif
	/* FIXME: for what must we do this */
	*(unsigned long *)0x79000080 = 0x0001;
	return(0);
}

int misc_init_r (void)
{
	char *s1;
	int i, xilinx_val;
	volatile char *xilinx_adr;
	xilinx_adr = (char *)0x79000102;

	*xilinx_adr = 0x00;

/* customer settings ***************************************** */
/*
	s1 = getenv ("function");
	if (s1) {
		if (!strcmp (s1, "Rosho")) {
			printf ("function 'Rosho' activated\n");
			*xilinx_adr = 0x40;
		}
		else {
			printf (">>>>>>>>>> function %s not recognized\n",s1);
		}
	}
*/

/* individual settings ***************************************** */
	if ((s1 = getenv ("xilinx"))) {
		i=0;
		xilinx_val = 0;
		while (i < 3 && s1[i]) {
			if (s1[i] >= '0' && s1[i] <= '9')
				xilinx_val = (xilinx_val << 4) + s1[i] - '0';