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/*
* Copyright 2010 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* Version 2 as published by the Free Software Foundation.
*/
#include <common.h>
#include <asm/fsl_lbc.h>
#ifdef CONFIG_MPC85xx
/* Boards should provide their own version of this if they use lbc sdram */
void __sdram_init(void)
{
/* Do nothing */
}
void sdram_init(void) __attribute__((weak, alias("__sdram_init")));
#endif
void print_lbc_regs(void)
{
int i;
printf("\nLocal Bus Controller Registers\n");
for (i = 0; i < 8; i++) {
printf("BR%d\t0x%08X\tOR%d\t0x%08X\n",
i, get_lbc_br(i), i, get_lbc_or(i));
}
}
void init_early_memctl_regs(void)
{
uint init_br1 = 1;
#ifdef CONFIG_MPC85xx
/* if cs1 is already set via debugger, leave cs0/cs1 alone */
if (get_lbc_br(1) & BR_V)
init_br1 = 0;
#endif
/*
* Map banks 0 (and maybe 1) to the FLASH banks 0 (and 1) at
* preliminary addresses - these have to be modified later
* when FLASH size has been determined
*/
#if defined(CONFIG_SYS_OR0_REMAP)
set_lbc_or(0, CONFIG_SYS_OR0_REMAP);
#endif
#if defined(CONFIG_SYS_OR1_REMAP)
set_lbc_or(1, CONFIG_SYS_OR1_REMAP);
#endif
/* now restrict to preliminary range */
if (init_br1) {
set_lbc_br(0, CONFIG_SYS_BR0_PRELIM);
set_lbc_or(0, CONFIG_SYS_OR0_PRELIM);
#if defined(CONFIG_SYS_BR1_PRELIM) && defined(CONFIG_SYS_OR1_PRELIM)
set_lbc_or(1, CONFIG_SYS_OR1_PRELIM);
set_lbc_br(1, CONFIG_SYS_BR1_PRELIM);
#endif
}
#if defined(CONFIG_SYS_BR2_PRELIM) && defined(CONFIG_SYS_OR2_PRELIM)
set_lbc_or(2, CONFIG_SYS_OR2_PRELIM);
set_lbc_br(2, CONFIG_SYS_BR2_PRELIM);
#endif
#if defined(CONFIG_SYS_BR3_PRELIM) && defined(CONFIG_SYS_OR3_PRELIM)
set_lbc_or(3, CONFIG_SYS_OR3_PRELIM);
set_lbc_br(3, CONFIG_SYS_BR3_PRELIM);
#endif
#if defined(CONFIG_SYS_BR4_PRELIM) && defined(CONFIG_SYS_OR4_PRELIM)
set_lbc_or(4, CONFIG_SYS_OR4_PRELIM);
set_lbc_br(4, CONFIG_SYS_BR4_PRELIM);
#endif
#if defined(CONFIG_SYS_BR5_PRELIM) && defined(CONFIG_SYS_OR5_PRELIM)
set_lbc_or(5, CONFIG_SYS_OR5_PRELIM);
set_lbc_br(5, CONFIG_SYS_BR5_PRELIM);
#endif
#if defined(CONFIG_SYS_BR6_PRELIM) && defined(CONFIG_SYS_OR6_PRELIM)
set_lbc_or(6, CONFIG_SYS_OR6_PRELIM);
set_lbc_br(6, CONFIG_SYS_BR6_PRELIM);
#endif
#if defined(CONFIG_SYS_BR7_PRELIM) && defined(CONFIG_SYS_OR7_PRELIM)
set_lbc_or(7, CONFIG_SYS_OR7_PRELIM);
set_lbc_br(7, CONFIG_SYS_BR7_PRELIM);
#endif
}
/*
* Configures a UPM. The function requires the respective MxMR to be set
* before calling this function. "size" is the number or entries, not a sizeof.
*/
void upmconfig(uint upm, uint *table, uint size)
{
fsl_lbc_t *lbc = LBC_BASE_ADDR;
int i, mdr, mad, old_mad = 0;
u32 mask = (~MxMR_OP_MSK & ~MxMR_MAD_MSK);
u32 msel = BR_UPMx_TO_MSEL(upm);
u32 *mxmr = &lbc->mamr + upm;
volatile u8 *dummy = NULL;
if (upm < UPMA || upm > UPMC) {
printf("Error: %s() Bad UPM index %d\n", __func__, upm);
hang();
}
/*
* Find the address for the dummy write - scan all of the BRs until we
* find one matching the UPM and extract the base address bits from it.
*/
for (i = 0; i < 8; i++) {
if ((get_lbc_br(i) & (BR_V | BR_MSEL)) == (BR_V | msel)) {
dummy = (volatile u8 *)(get_lbc_br(i) & BR_BA);
break;
}
}
if (!dummy) {
printf("Error: %s() No matching BR\n", __func__);
hang();
}
/* Program UPM using steps outlined by the reference manual */
for (i = 0; i < size; i++) {
out_be32(mxmr, (in_be32(mxmr) & mask) | MxMR_OP_WARR | i);
out_be32(&lbc->mdr, table[i]);
mdr = in_be32(&lbc->mdr);
*dummy = 0;
do {
mad = in_be32(mxmr) & MxMR_MAD_MSK;
} while (mad <= old_mad && !(!mad && i == (size-1)));
old_mad = mad;
}
/* Return to normal operation */
out_be32(mxmr, (in_be32(mxmr) & mask) | MxMR_OP_NORM);
}
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