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 */ 14 void __lbc_sdram_init(void) 15 { 16 /* Do nothing */ 17 } 18 void lbc_sdram_init(void) __attribute__((weak, alias("__lbc_sdram_init"))); 19 #endif 20 21 22 void 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 33 void 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 */ 107 void 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