bamboo.c

gumstiz u-boot loader in linux

/*
 * (C) Copyright 2005
 * Stefan Roese, 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
 */

#include <common.h>
#include <asm/processor.h>
#include <spd_sdram.h>
#include <ppc440.h>
#include "bamboo.h"

void ext_bus_cntlr_init(void);
void configure_ppc440ep_pins(void);
int is_nand_selected(void);

unsigned char cfg_simulate_spd_eeprom[128];

gpio_param_s gpio_tab[GPIO_GROUP_MAX][GPIO_MAX];
#if 0
{	   /* GPIO   Alternate1	      Alternate2	Alternate3 */
    {
	/* GPIO Core 0 */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_0	-> EBC_ADDR(7)	    DMA_REQ(2) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_1	-> EBC_ADDR(6)	    DMA_ACK(2) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_2	-> EBC_ADDR(5)	    DMA_EOT/TC(2) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_3	-> EBC_ADDR(4)	    DMA_REQ(3) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_4	-> EBC_ADDR(3)	    DMA_ACK(3) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_5 ................. */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_6	-> EBC_CS_N(1) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_7	-> EBC_CS_N(2) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_8	-> EBC_CS_N(3) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_ALT1 }, /* GPIO0_9	 -> EBC_CS_N(4) */
	{ GPIO0_BASE, GPIO_OUT, GPIO_ALT1 }, /* GPIO0_10 -> EBC_CS_N(5) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_11 -> EBC_BUS_ERR */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_12 -> ZII_p0Rxd(0) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_13 -> ZII_p0Rxd(1) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_14 -> ZII_p0Rxd(2) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_15 -> ZII_p0Rxd(3) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_16 -> ZII_p0Txd(0) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_17 -> ZII_p0Txd(1) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_18 -> ZII_p0Txd(2) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_19 -> ZII_p0Txd(3) */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_20 -> ZII_p0Rx_er */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_21 -> ZII_p0Rx_dv */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_22 -> ZII_p0RxCrs */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_23 -> ZII_p0Tx_er */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_24 -> ZII_p0Tx_en */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_25 -> ZII_p0Col */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_26 ->		    USB2D_RXVALID */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_27 -> EXT_EBC_REQ	    USB2D_RXERROR */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_28 ->		    USB2D_TXVALID */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_29 -> EBC_EXT_HDLA	    USB2D_PAD_SUSPNDM */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_30 -> EBC_EXT_ACK	    USB2D_XCVRSELECT */
	{ GPIO0_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO0_31 -> EBC_EXR_BUSREQ   USB2D_TERMSELECT */
    },
    {
	/* GPIO Core 1 */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_0	-> USB2D_OPMODE0 */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_1	-> USB2D_OPMODE1 */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_2	-> UART0_DCD_N	    UART1_DSR_CTS_N   UART2_SOUT */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_3	-> UART0_8PIN_DSR_N UART1_RTS_DTR_N   UART2_SIN */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_4	-> UART0_8PIN_CTS_N		      UART3_SIN */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_5	-> UART0_RTS_N */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_6	-> UART0_DTR_N	    UART1_SOUT */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_7	-> UART0_RI_N	    UART1_SIN */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_8	-> UIC_IRQ(0) */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_9	-> UIC_IRQ(1) */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_10 -> UIC_IRQ(2) */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_11 -> UIC_IRQ(3) */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_12 -> UIC_IRQ(4)	    DMA_ACK(1) */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_13 -> UIC_IRQ(6)	    DMA_EOT/TC(1) */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_14 -> UIC_IRQ(7)	    DMA_REQ(0) */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_15 -> UIC_IRQ(8)	    DMA_ACK(0) */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_16 -> UIC_IRQ(9)	    DMA_EOT/TC(0) */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_17 -> - */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_18 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_19 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_20 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_21 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_22 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_23 ->   \	   Can be unselected thru TraceSelect Bit */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_24 ->   /	      in PowerPC440EP Chip */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_25 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_26 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_27 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_28 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_29 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_30 ->  | */
	{ GPIO1_BASE, GPIO_DIS, GPIO_SEL }, /* GPIO1_31 -> - */
    }
};
#endif

/*----------------------------------------------------------------------------+
  | EBC Devices Characteristics
  |   Peripheral Bank Access Parameters	      -	  EBC0_BnAP
  |   Peripheral Bank Configuration Register  -	  EBC0_BnCR
  +----------------------------------------------------------------------------*/
/* Small Flash */
#define EBC0_BNAP_SMALL_FLASH				\
	EBC0_BNAP_BME_DISABLED			|	\
	EBC0_BNAP_TWT_ENCODE(6)			|	\
	EBC0_BNAP_CSN_ENCODE(0)	    		|	\
	EBC0_BNAP_OEN_ENCODE(1)	    		|	\
	EBC0_BNAP_WBN_ENCODE(1)	    		|	\
	EBC0_BNAP_WBF_ENCODE(3)	    		|	\
	EBC0_BNAP_TH_ENCODE(1)	    		|	\
	EBC0_BNAP_RE_ENABLED	    		|	\
	EBC0_BNAP_SOR_DELAYED	    		|	\
	EBC0_BNAP_BEM_WRITEONLY	    		|	\
	EBC0_BNAP_PEN_DISABLED

#define EBC0_BNCR_SMALL_FLASH_CS0			\
	EBC0_BNCR_BAS_ENCODE(0xFFF00000)    	| 	\
	EBC0_BNCR_BS_1MB		    	|	\
	EBC0_BNCR_BU_RW			    	|	\
	EBC0_BNCR_BW_8BIT

#define EBC0_BNCR_SMALL_FLASH_CS4			\
	EBC0_BNCR_BAS_ENCODE(0x87F00000)    	| 	\
	EBC0_BNCR_BS_1MB		    	|	\
	EBC0_BNCR_BU_RW			    	|	\
	EBC0_BNCR_BW_8BIT

/* Large Flash or SRAM */
#define EBC0_BNAP_LARGE_FLASH_OR_SRAM			\
	EBC0_BNAP_BME_DISABLED	    		|	\
	EBC0_BNAP_TWT_ENCODE(8)	    		|	\
	EBC0_BNAP_CSN_ENCODE(0)	    		|	\
	EBC0_BNAP_OEN_ENCODE(1)	    		|	\
	EBC0_BNAP_WBN_ENCODE(1)	    		|	\
	EBC0_BNAP_WBF_ENCODE(1)	    		|	\
	EBC0_BNAP_TH_ENCODE(2)	    		|	\
	EBC0_BNAP_SOR_DELAYED	    		|	\
	EBC0_BNAP_BEM_RW	    		|	\
	EBC0_BNAP_PEN_DISABLED

#define EBC0_BNCR_LARGE_FLASH_OR_SRAM_CS0   		\
	EBC0_BNCR_BAS_ENCODE(0xFF800000)	| 	\
	EBC0_BNCR_BS_8MB		    	|	\
	EBC0_BNCR_BU_RW			    	|	\
	EBC0_BNCR_BW_16BIT


#define EBC0_BNCR_LARGE_FLASH_OR_SRAM_CS4   		\
	EBC0_BNCR_BAS_ENCODE(0x87800000)	| 	\
	EBC0_BNCR_BS_8MB		    	|	\
	EBC0_BNCR_BU_RW			    	|	\
	EBC0_BNCR_BW_16BIT

/* NVRAM - FPGA */
#define EBC0_BNAP_NVRAM_FPGA				\
	EBC0_BNAP_BME_DISABLED	    		|	\
	EBC0_BNAP_TWT_ENCODE(9)	    		|	\
	EBC0_BNAP_CSN_ENCODE(0)	    		|	\
	EBC0_BNAP_OEN_ENCODE(1)	    		|	\
	EBC0_BNAP_WBN_ENCODE(1)	    		|	\
	EBC0_BNAP_WBF_ENCODE(0)	    		|	\
	EBC0_BNAP_TH_ENCODE(2)	    		|	\
	EBC0_BNAP_RE_ENABLED	    		|	\
	EBC0_BNAP_SOR_DELAYED	    		|	\
	EBC0_BNAP_BEM_WRITEONLY	    		|	\
	EBC0_BNAP_PEN_DISABLED

#define EBC0_BNCR_NVRAM_FPGA_CS5			\
	EBC0_BNCR_BAS_ENCODE(0x80000000)    	| 	\
	EBC0_BNCR_BS_1MB		    	|	\
	EBC0_BNCR_BU_RW			    	|	\
	EBC0_BNCR_BW_8BIT

/* Nand Flash */
#define EBC0_BNAP_NAND_FLASH				\
	EBC0_BNAP_BME_DISABLED	    		|	\
	EBC0_BNAP_TWT_ENCODE(3)	    		|	\
	EBC0_BNAP_CSN_ENCODE(0)	    		|	\
	EBC0_BNAP_OEN_ENCODE(0)	    		|	\
	EBC0_BNAP_WBN_ENCODE(0)	    		|	\
	EBC0_BNAP_WBF_ENCODE(0)	    		|	\
	EBC0_BNAP_TH_ENCODE(1)	    		|	\
	EBC0_BNAP_RE_ENABLED	    		|	\
	EBC0_BNAP_SOR_NOT_DELAYED   		|	\
	EBC0_BNAP_BEM_RW	    		|	\
	EBC0_BNAP_PEN_DISABLED


#define EBC0_BNCR_NAND_FLASH_CS0	0xB8400000

/* NAND0 */
#define EBC0_BNCR_NAND_FLASH_CS1			\
	EBC0_BNCR_BAS_ENCODE(0x90000000)    	| 	\
	EBC0_BNCR_BS_1MB		    	|	\
	EBC0_BNCR_BU_RW			    	|	\
	EBC0_BNCR_BW_32BIT
/* NAND1 - Bank2 */
#define EBC0_BNCR_NAND_FLASH_CS2			\
	EBC0_BNCR_BAS_ENCODE(0x94000000)    	| 	\
	EBC0_BNCR_BS_1MB		    	|	\
	EBC0_BNCR_BU_RW			    	|	\
	EBC0_BNCR_BW_32BIT

/* NAND1 - Bank3 */
#define EBC0_BNCR_NAND_FLASH_CS3			\
	EBC0_BNCR_BAS_ENCODE(0x94000000)    	| 	\
	EBC0_BNCR_BS_1MB		    	|	\
	EBC0_BNCR_BU_RW			    	|	\
	EBC0_BNCR_BW_32BIT

int board_early_init_f(void)
{
	ext_bus_cntlr_init();

	/*--------------------------------------------------------------------
	 * Setup the interrupt controller polarities, triggers, etc.
	 *-------------------------------------------------------------------*/
	mtdcr(uic0sr, 0xffffffff);	/* clear all */
	mtdcr(uic0er, 0x00000000);	/* disable all */
	mtdcr(uic0cr, 0x00000009);	/* ATI & 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 */

	/*--------------------------------------------------------------------
	 * Setup the GPIO pins
	 *-------------------------------------------------------------------*/
	out32(GPIO0_OSRL,  0x00000400);
	out32(GPIO0_OSRH,  0x00000000);
	out32(GPIO0_TSRL,  0x00000400);
	out32(GPIO0_TSRH,  0x00000000);
	out32(GPIO0_ISR1L, 0x00000000);
	out32(GPIO0_ISR1H, 0x00000000);
	out32(GPIO0_ISR2L, 0x00000000);
	out32(GPIO0_ISR2H, 0x00000000);
	out32(GPIO0_ISR3L, 0x00000000);
	out32(GPIO0_ISR3H, 0x00000000);

	out32(GPIO1_OSRL,  0x0C380000);
	out32(GPIO1_OSRH,  0x00000000);
	out32(GPIO1_TSRL,  0x0C380000);
	out32(GPIO1_TSRH,  0x00000000);
	out32(GPIO1_ISR1L, 0x0FC30000);
	out32(GPIO1_ISR1H, 0x00000000);
	out32(GPIO1_ISR2L, 0x0C010000);
	out32(GPIO1_ISR2H, 0x00000000);
	out32(GPIO1_ISR3L, 0x01400000);
	out32(GPIO1_ISR3H, 0x00000000);

	configure_ppc440ep_pins();

	return 0;
}

#if (CONFIG_COMMANDS & CFG_CMD_NAND)
#include <linux/mtd/nand.h>
extern struct nand_chip nand_dev_desc[CFG_MAX_NAND_DEVICE];

/*----------------------------------------------------------------------------+
  | nand_reset.
  |   Reset Nand flash
  |   This routine will abort previous cmd
  +----------------------------------------------------------------------------*/
int nand_reset(ulong addr)
{
	int wait=0, stat=0;

	out8(addr + NAND_CMD_REG, NAND0_CMD_RESET);
	out8(addr + NAND_CMD_REG, NAND0_CMD_READ_STATUS);

	while ((stat != 0xc0) && (wait != 0xffff)) {
		stat = in8(addr + NAND_DATA_REG);
		wait++;
	}

	if (stat == 0xc0) {
		return 0;
	} else {
		printf("NAND Reset timeout.\n");
		return -1;
	}
}

void board_nand_set_device(int cs, ulong addr)
{
	/* Set NandFlash Core Configuration Register */
	out32(addr + NAND_CCR_REG, 0x00001000 | (cs << 24));

	switch (cs) {
	case 1:
		/* -------
		 *  NAND0
		 * -------
		 * K9F1208U0A : 4 addr cyc, 1 col + 3 Row
		 * Set NDF1CR - Enable External CS1 in NAND FLASH controller
		 */
		out32(addr + NAND_CR1_REG, 0x80002222);
		break;

	case 2:
		/* -------
		 *  NAND1
		 * -------
		 * K9K2G0B : 5 addr cyc, 2 col + 3 Row
		 * Set NDF2CR : Enable External CS2 in NAND FLASH controller
		 */
		out32(addr + NAND_CR2_REG, 0xC0007777);
		break;
	}

	/* Perform Reset Command */
	if (nand_reset(addr) != 0)
		return;
}

void nand_init(void)
{
	board_nand_set_device(1, CFG_NAND_ADDR);

	nand_probe(CFG_NAND_ADDR);
	if (nand_dev_desc[0].ChipID != NAND_ChipID_UNKNOWN) {
		print_size(nand_dev_desc[0].totlen, "\n");
	}

#if 0 /* NAND1 not supported yet */
	board_nand_set_device(2, CFG_NAND2_ADDR);

	nand_probe(CFG_NAND2_ADDR);
	if (nand_dev_desc[0].ChipID != NAND_ChipID_UNKNOWN) {
		print_size(nand_dev_desc[0].totlen, "\n");
	}
#endif
}
#endif /* (CONFIG_COMMANDS & CFG_CMD_NAND) */

int checkboard(void)
{
	char *s = getenv("serial#");

	printf("Board: Bamboo - AMCC PPC440EP Evaluation Board");
	if (s != NULL) {
		puts(", serial# ");
		puts(s);
	}
	putc('\n');

	return (0);
}

/*************************************************************************
 *
 * init_spd_array -- Bamboo has one bank onboard sdram (plus DIMM)