diff options
Diffstat (limited to 'board/spd8xx/spd8xx.c')
| -rw-r--r-- | board/spd8xx/spd8xx.c | 324 | 
1 files changed, 324 insertions, 0 deletions
| diff --git a/board/spd8xx/spd8xx.c b/board/spd8xx/spd8xx.c new file mode 100644 index 000000000..64288968a --- /dev/null +++ b/board/spd8xx/spd8xx.c @@ -0,0 +1,324 @@ +/* + * (C) Copyright 2000 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * Ulrich Lutz, Speech Design GmbH, ulutz@datalab.de. + * + * 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 <mpc8xx.h> +#include <commproc.h> + +/* ------------------------------------------------------------------------- */ + +static long int dram_size (long int, long int *, long int); + +/* ------------------------------------------------------------------------- */ + +#define	_NOT_USED_	0xFFFFFFFF + +const uint sharc_table[] = +{ +	/* +	 * Single Read. (Offset 0 in UPM RAM) +	 */ +	0x0FF3FC04, 0x0FF3EC00, 0x7FFFEC04, 0xFFFFEC04, +	0xFFFFEC05, /* last */ +	            _NOT_USED_, _NOT_USED_, _NOT_USED_, +	/* +	 * Burst Read. (Offset 8 in UPM RAM) +	 */ +	/* last */ +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	/* +	 * Single Write. (Offset 18 in UPM RAM) +	 */ +	0x0FAFFC04, 0x0FAFEC00, 0x7FFFEC04, 0xFFFFEC04, +	0xFFFFEC05, /* last */ +	            _NOT_USED_, _NOT_USED_, _NOT_USED_, +	/* +	 * Burst Write. (Offset 20 in UPM RAM) +	 */ +	/* last */ +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	/* +	 * Refresh  (Offset 30 in UPM RAM) +	 */ +	/* last */ +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	/* +	 * Exception. (Offset 3c in UPM RAM) +	 */ +	0x7FFFFC07, /* last */ +		    _NOT_USED_, _NOT_USED_, _NOT_USED_, +}; + + +const uint sdram_table[] = +{ +	/* +	 * Single Read. (Offset 0 in UPM RAM) +	 */ +	0x1F07FC04, 0xEEAEFC04, 0x11ADFC04, 0xEFBBBC00, +	0x1FF77C47, /* last */ +	/* +	 * SDRAM Initialization (offset 5 in UPM RAM) +	 * +         * This is no UPM entry point. The following definition uses +         * the remaining space to establish an initialization +         * sequence, which is executed by a RUN command. +	 * +	 */ +		    0x1FF77C35, 0xEFEABC34, 0x1FB57C35, /* last */ +	/* +	 * Burst Read. (Offset 8 in UPM RAM) +	 */ +	0x1F07FC04, 0xEEAEFC04, 0x10ADFC04, 0xF0AFFC00, +	0xF0AFFC00, 0xF1AFFC00, 0xEFBBBC00, 0x1FF77C47, /* last */ +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	/* +	 * Single Write. (Offset 18 in UPM RAM) +	 */ +	0x1F27FC04, 0xEEAEBC00, 0x01B93C04, 0x1FF77C47, /* last */ +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	/* +	 * Burst Write. (Offset 20 in UPM RAM) +	 */ +	0x1F07FC04, 0xEEAEBC00, 0x10AD7C00, 0xF0AFFC00, +	0xF0AFFC00, 0xE1BBBC04, 0x1FF77C47, /* last */ +					    _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	/* +	 * Refresh  (Offset 30 in UPM RAM) +	 */ +	0x1FF5FC84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, +	0xFFFFFC84, 0xFFFFFC07, /* last */ +				_NOT_USED_, _NOT_USED_, +	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, +	/* +	 * Exception. (Offset 3c in UPM RAM) +	 */ +	0x7FFFFC07, /* last */ +		    _NOT_USED_, _NOT_USED_, _NOT_USED_, +}; + +/* ------------------------------------------------------------------------- */ + + +/* + * Check Board Identity: + * + */ + +int checkboard (void) +{ +	puts ("Board: SPD823TS\n"); +	return (0); +} + +/* ------------------------------------------------------------------------- */ + +long int +initdram (int board_type) +{ +    volatile immap_t     *immap  = (immap_t *)CFG_IMMR; +    volatile memctl8xx_t *memctl = &immap->im_memctl; +    long int size_b0; + +#if 0 +    /* +     * Map controller bank 2 to the SRAM bank at preliminary address. +     */ +    memctl->memc_or2 = CFG_OR2; +    memctl->memc_br2 = CFG_BR2; +#endif + +    /* +     * Map controller bank 4 to the PER8 bank. +     */ +    memctl->memc_or4 = CFG_OR4; +    memctl->memc_br4 = CFG_BR4; + +#if 0 +    /* Configure SHARC at UMA */ +    upmconfig(UPMA, (uint *)sharc_table, sizeof(sharc_table)/sizeof(uint)); +    /* Map controller bank 5 to the SHARC */ +    memctl->memc_or5 = CFG_OR5; +    memctl->memc_br5 = CFG_BR5; +#endif + +    memctl->memc_mamr = 0x00001000; + +    /* Configure SDRAM at UMB */ +    upmconfig(UPMB, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint)); + +    memctl->memc_mptpr = CFG_MPTPR_1BK_8K; + +    memctl->memc_mar = 0x00000088; + +    /* +     * Map controller bank 3 to the SDRAM bank at preliminary address. +     */ +    memctl->memc_or3 = CFG_OR3_PRELIM; +    memctl->memc_br3 = CFG_BR3_PRELIM; + +    memctl->memc_mbmr = CFG_MBMR_8COL;	/* refresh not enabled yet */ + +    udelay(200); +    memctl->memc_mcr = 0x80806105; +    udelay(1); +    memctl->memc_mcr = 0x80806130; +    udelay(1); +    memctl->memc_mcr = 0x80806130; +    udelay(1); +    memctl->memc_mcr = 0x80806106; + +    memctl->memc_mbmr |= MAMR_PTBE;	/* refresh enabled */ + +    /* +     * Check Bank 0 Memory Size for re-configuration +     */ +    size_b0 = dram_size (CFG_MBMR_8COL, (ulong *)SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE); + +    memctl->memc_mbmr = CFG_MBMR_8COL | MAMR_PTBE; + +    return (size_b0); +} + +/* ------------------------------------------------------------------------- */ + +/* + * Check memory range for valid RAM. A simple memory test determines + * the actually available RAM size between addresses `base' and + * `base + maxsize'. Some (not all) hardware errors are detected: + * - short between address lines + * - short between data lines + */ + +static long int dram_size (long int mamr_value, long int *base, long int maxsize) +{ +    volatile immap_t     *immap  = (immap_t *)CFG_IMMR; +    volatile memctl8xx_t *memctl = &immap->im_memctl; +    volatile long int	 *addr; +    ulong		  cnt, val; +    ulong		  save[32];	/* to make test non-destructive */ +    unsigned char	  i = 0; + +    memctl->memc_mbmr = mamr_value; + +    for (cnt = maxsize/sizeof(long); cnt > 0; cnt >>= 1) { +	addr = base + cnt;	/* pointer arith! */ + +	save[i++] = *addr; +	*addr = ~cnt; +    } + +    /* write 0 to base address */ +    addr = base; +    save[i] = *addr; +    *addr = 0; + +    /* check at base address */ +    if ((val = *addr) != 0) { +	*addr = save[i]; +	return (0); +    } + +    for (cnt = 1; cnt <= maxsize/sizeof(long); cnt <<= 1) { +	addr = base + cnt;	/* pointer arith! */ + +	val = *addr; +	*addr = save[--i]; + +	if (val != (~cnt)) { +	    return (cnt * sizeof(long)); +	} +    } +    return (maxsize); +} + +/* ------------------------------------------------------------------------- */ + +void	reset_phy(void) +{ +	immap_t *immr = (immap_t *)CFG_IMMR; +	ushort sreg; + +	/* Configure extra port pins for NS DP83843 PHY */ +	immr->im_ioport.iop_papar &= ~(PA_ENET_MDC | PA_ENET_MDIO); + +	sreg  = immr->im_ioport.iop_padir; +	sreg |=   PA_ENET_MDC;		/* Mgmt. Data Clock is Output */ +	sreg &= ~(PA_ENET_MDIO);	/* Mgmt. Data I/O is bidirect. => Input */ +	immr->im_ioport.iop_padir = sreg; + +	immr->im_ioport.iop_padat &= ~(PA_ENET_MDC);	/* set MDC = 0 */ + +	/* +         * RESET in implemented by a positive pulse of at least 1 us +         * at the reset pin. +	 * +	 * Configure RESET pins for NS DP83843 PHY, and RESET chip. +	 * +	 * Note: The RESET pin is high active, but there is an +	 *	 inverter on the SPD823TS board... +	 */ +	immr->im_ioport.iop_pcpar &= ~(PC_ENET_RESET); +	immr->im_ioport.iop_pcdir |=   PC_ENET_RESET; +	/* assert RESET signal of PHY */ +	immr->im_ioport.iop_pcdat &= ~(PC_ENET_RESET); +	udelay (10); +	/* de-assert RESET signal of PHY */ +	immr->im_ioport.iop_pcdat |=   PC_ENET_RESET; +	udelay (10); +} + +/* ------------------------------------------------------------------------- */ + +void ide_set_reset(int on) +{ +	volatile immap_t *immr = (immap_t *)CFG_IMMR; + +	/* +	 * Configure PC for IDE Reset Pin +	 */ +	if (on) {		/* assert RESET */ +		immr->im_ioport.iop_pcdat &= ~(CFG_PC_IDE_RESET); +	} else {		/* release RESET */ +		immr->im_ioport.iop_pcdat |=   CFG_PC_IDE_RESET; +	} + +	/* program port pin as GPIO output */ +	immr->im_ioport.iop_pcpar &= ~(CFG_PC_IDE_RESET); +	immr->im_ioport.iop_pcso  &= ~(CFG_PC_IDE_RESET); +	immr->im_ioport.iop_pcdir |=   CFG_PC_IDE_RESET; +} + +/* ------------------------------------------------------------------------- */ |