LXR uboot/arch/powerpc/cpu/mpc8xxx/fsl

   1/*
   2 * Copyright 2010-2011 Freescale Semiconductor, Inc.
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU General Public License
   6 * Version 2 as published by the Free Software Foundation.
   7 */
   8
   9#include <common.h>
  10#include <asm/fsl_lbc.h>
  11
  12#ifdef CONFIG_MPC85xx
  13/* Boards should provide their own version of this if they use lbc sdram */
  14void __lbc_sdram_init(void)
  15{
  16        /* Do nothing */
  17}
  18void lbc_sdram_init(void) __attribute__((weak, alias("__lbc_sdram_init")));
  19#endif
  20
  21
  22void print_lbc_regs(void)
  23{
  24        int i;
  25
  26        printf("\nLocal Bus Controller Registers\n");
  27        for (i = 0; i < 8; i++) {
  28                printf("BR%d\t0x%08X\tOR%d\t0x%08X\n",
  29                       i, get_lbc_br(i), i, get_lbc_or(i));
  30        }
  31}
  32
  33void init_early_memctl_regs(void)
  34{
  35        uint init_br1 = 1;
  36
  37#ifdef CONFIG_SYS_FSL_ERRATUM_ELBC_A001
  38        /* Set the local bus monitor timeout value to the maximum */
  39        clrsetbits_be32(&(LBC_BASE_ADDR)->lbcr, LBCR_BMT|LBCR_BMTPS, 0xf);
  40#endif
  41
  42#ifdef CONFIG_MPC85xx
  43        /* if cs1 is already set via debugger, leave cs0/cs1 alone */
  44        if (get_lbc_br(1) & BR_V)
  45                init_br1 = 0;
  46#endif
  47
  48        /*
  49         * Map banks 0 (and maybe 1) to the FLASH banks 0 (and 1) at
  50         * preliminary addresses - these have to be modified later
  51         * when FLASH size has been determined
  52         */
  53#if defined(CONFIG_SYS_OR0_REMAP)
  54        set_lbc_or(0, CONFIG_SYS_OR0_REMAP);
  55#endif
  56#if defined(CONFIG_SYS_OR1_REMAP)
  57        set_lbc_or(1, CONFIG_SYS_OR1_REMAP);
  58#endif
  59        /* now restrict to preliminary range */
  60        if (init_br1) {
  61#if defined(CONFIG_SYS_BR0_PRELIM) && defined(CONFIG_SYS_OR0_PRELIM)
  62                set_lbc_br(0, CONFIG_SYS_BR0_PRELIM);
  63                set_lbc_or(0, CONFIG_SYS_OR0_PRELIM);
  64#endif
  65
  66#if defined(CONFIG_SYS_BR1_PRELIM) && defined(CONFIG_SYS_OR1_PRELIM)
  67                set_lbc_or(1, CONFIG_SYS_OR1_PRELIM);
  68                set_lbc_br(1, CONFIG_SYS_BR1_PRELIM);
  69#endif
  70        }
  71
  72#if defined(CONFIG_SYS_BR2_PRELIM) && defined(CONFIG_SYS_OR2_PRELIM)
  73        set_lbc_or(2, CONFIG_SYS_OR2_PRELIM);
  74        set_lbc_br(2, CONFIG_SYS_BR2_PRELIM);
  75#endif
  76
  77#if defined(CONFIG_SYS_BR3_PRELIM) && defined(CONFIG_SYS_OR3_PRELIM)
  78        set_lbc_or(3, CONFIG_SYS_OR3_PRELIM);
  79        set_lbc_br(3, CONFIG_SYS_BR3_PRELIM);
  80#endif
  81
  82#if defined(CONFIG_SYS_BR4_PRELIM) && defined(CONFIG_SYS_OR4_PRELIM)
  83        set_lbc_or(4, CONFIG_SYS_OR4_PRELIM);
  84        set_lbc_br(4, CONFIG_SYS_BR4_PRELIM);
  85#endif
  86
  87#if defined(CONFIG_SYS_BR5_PRELIM) && defined(CONFIG_SYS_OR5_PRELIM)
  88        set_lbc_or(5, CONFIG_SYS_OR5_PRELIM);
  89        set_lbc_br(5, CONFIG_SYS_BR5_PRELIM);
  90#endif
  91
  92#if defined(CONFIG_SYS_BR6_PRELIM) && defined(CONFIG_SYS_OR6_PRELIM)
  93        set_lbc_or(6, CONFIG_SYS_OR6_PRELIM);
  94        set_lbc_br(6, CONFIG_SYS_BR6_PRELIM);
  95#endif
  96
  97#if defined(CONFIG_SYS_BR7_PRELIM) && defined(CONFIG_SYS_OR7_PRELIM)
  98        set_lbc_or(7, CONFIG_SYS_OR7_PRELIM);
  99        set_lbc_br(7, CONFIG_SYS_BR7_PRELIM);
 100#endif
 101}
 102
 103/*
 104 * Configures a UPM. The function requires the respective MxMR to be set
 105 * before calling this function. "size" is the number or entries, not a sizeof.
 106 */
 107void upmconfig(uint upm, uint *table, uint size)
 108{
 109        fsl_lbc_t *lbc = LBC_BASE_ADDR;
 110        int i, mad, old_mad = 0;
 111        u32 mask = (~MxMR_OP_MSK & ~MxMR_MAD_MSK);
 112        u32 msel = BR_UPMx_TO_MSEL(upm);
 113        u32 *mxmr = &lbc->mamr + upm;
 114        volatile u8 *dummy = NULL;
 115
 116        if (upm < UPMA || upm > UPMC) {
 117                printf("Error: %s() Bad UPM index %d\n", __func__, upm);
 118                hang();
 119        }
 120
 121        /*
 122         * Find the address for the dummy write - scan all of the BRs until we
 123         * find one matching the UPM and extract the base address bits from it.
 124         */
 125        for (i = 0; i < 8; i++) {
 126                if ((get_lbc_br(i) & (BR_V | BR_MSEL)) == (BR_V | msel)) {
 127                        dummy = (volatile u8 *)(get_lbc_br(i) & BR_BA);
 128                        break;
 129                }
 130        }
 131
 132        if (!dummy) {
 133                printf("Error: %s() No matching BR\n", __func__);
 134                hang();
 135        }
 136
 137        /* Program UPM using steps outlined by the reference manual */
 138        for (i = 0; i < size; i++) {
 139                out_be32(mxmr, (in_be32(mxmr) & mask) | MxMR_OP_WARR | i);
 140                out_be32(&lbc->mdr, table[i]);
 141                (void)in_be32(&lbc->mdr);
 142                *dummy = 0;
 143                do {
 144                        mad = in_be32(mxmr) & MxMR_MAD_MSK;
 145                } while (mad <= old_mad && !(!mad && i == (size-1)));
 146                old_mad = mad;
 147        }
 148
 149        /* Return to normal operation */
 150        out_be32(mxmr, (in_be32(mxmr) & mask) | MxMR_OP_NORM);
 151}
 152