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https://github.com/AsahiLinux/u-boot
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f133796da8
Simultaneous FCM and GPCM or UPM operation may erroneously trigger bus monitor timeout. Set timeout to maximum to avoid. Based on a patch from Lan Chunhe <b25806@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
149 lines
3.9 KiB
C
149 lines
3.9 KiB
C
/*
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* Copyright 2010-2011 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* Version 2 as published by the Free Software Foundation.
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*/
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#include <common.h>
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#include <asm/fsl_lbc.h>
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#ifdef CONFIG_MPC85xx
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/* Boards should provide their own version of this if they use lbc sdram */
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void __lbc_sdram_init(void)
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{
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/* Do nothing */
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}
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void lbc_sdram_init(void) __attribute__((weak, alias("__lbc_sdram_init")));
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#endif
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void print_lbc_regs(void)
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{
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int i;
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printf("\nLocal Bus Controller Registers\n");
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for (i = 0; i < 8; i++) {
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printf("BR%d\t0x%08X\tOR%d\t0x%08X\n",
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i, get_lbc_br(i), i, get_lbc_or(i));
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}
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}
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void init_early_memctl_regs(void)
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{
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uint init_br1 = 1;
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#ifdef CONFIG_SYS_FSL_ERRATUM_ELBC_A001
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/* Set the local bus monitor timeout value to the maximum */
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clrsetbits_be32(&(LBC_BASE_ADDR)->lbcr, LBCR_BMT|LBCR_BMTPS, 0xf);
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#endif
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#ifdef CONFIG_MPC85xx
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/* if cs1 is already set via debugger, leave cs0/cs1 alone */
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if (get_lbc_br(1) & BR_V)
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init_br1 = 0;
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#endif
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/*
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* Map banks 0 (and maybe 1) to the FLASH banks 0 (and 1) at
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* preliminary addresses - these have to be modified later
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* when FLASH size has been determined
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*/
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#if defined(CONFIG_SYS_OR0_REMAP)
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set_lbc_or(0, CONFIG_SYS_OR0_REMAP);
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#endif
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#if defined(CONFIG_SYS_OR1_REMAP)
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set_lbc_or(1, CONFIG_SYS_OR1_REMAP);
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#endif
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/* now restrict to preliminary range */
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if (init_br1) {
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set_lbc_br(0, CONFIG_SYS_BR0_PRELIM);
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set_lbc_or(0, CONFIG_SYS_OR0_PRELIM);
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#if defined(CONFIG_SYS_BR1_PRELIM) && defined(CONFIG_SYS_OR1_PRELIM)
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set_lbc_or(1, CONFIG_SYS_OR1_PRELIM);
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set_lbc_br(1, CONFIG_SYS_BR1_PRELIM);
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#endif
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}
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#if defined(CONFIG_SYS_BR2_PRELIM) && defined(CONFIG_SYS_OR2_PRELIM)
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set_lbc_or(2, CONFIG_SYS_OR2_PRELIM);
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set_lbc_br(2, CONFIG_SYS_BR2_PRELIM);
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#endif
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#if defined(CONFIG_SYS_BR3_PRELIM) && defined(CONFIG_SYS_OR3_PRELIM)
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set_lbc_or(3, CONFIG_SYS_OR3_PRELIM);
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set_lbc_br(3, CONFIG_SYS_BR3_PRELIM);
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#endif
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#if defined(CONFIG_SYS_BR4_PRELIM) && defined(CONFIG_SYS_OR4_PRELIM)
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set_lbc_or(4, CONFIG_SYS_OR4_PRELIM);
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set_lbc_br(4, CONFIG_SYS_BR4_PRELIM);
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#endif
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#if defined(CONFIG_SYS_BR5_PRELIM) && defined(CONFIG_SYS_OR5_PRELIM)
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set_lbc_or(5, CONFIG_SYS_OR5_PRELIM);
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set_lbc_br(5, CONFIG_SYS_BR5_PRELIM);
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#endif
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#if defined(CONFIG_SYS_BR6_PRELIM) && defined(CONFIG_SYS_OR6_PRELIM)
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set_lbc_or(6, CONFIG_SYS_OR6_PRELIM);
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set_lbc_br(6, CONFIG_SYS_BR6_PRELIM);
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#endif
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#if defined(CONFIG_SYS_BR7_PRELIM) && defined(CONFIG_SYS_OR7_PRELIM)
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set_lbc_or(7, CONFIG_SYS_OR7_PRELIM);
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set_lbc_br(7, CONFIG_SYS_BR7_PRELIM);
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#endif
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}
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/*
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* Configures a UPM. The function requires the respective MxMR to be set
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* before calling this function. "size" is the number or entries, not a sizeof.
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*/
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void upmconfig(uint upm, uint *table, uint size)
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{
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fsl_lbc_t *lbc = LBC_BASE_ADDR;
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int i, mdr, mad, old_mad = 0;
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u32 mask = (~MxMR_OP_MSK & ~MxMR_MAD_MSK);
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u32 msel = BR_UPMx_TO_MSEL(upm);
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u32 *mxmr = &lbc->mamr + upm;
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volatile u8 *dummy = NULL;
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if (upm < UPMA || upm > UPMC) {
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printf("Error: %s() Bad UPM index %d\n", __func__, upm);
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hang();
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}
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/*
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* Find the address for the dummy write - scan all of the BRs until we
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* find one matching the UPM and extract the base address bits from it.
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*/
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for (i = 0; i < 8; i++) {
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if ((get_lbc_br(i) & (BR_V | BR_MSEL)) == (BR_V | msel)) {
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dummy = (volatile u8 *)(get_lbc_br(i) & BR_BA);
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break;
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}
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}
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if (!dummy) {
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printf("Error: %s() No matching BR\n", __func__);
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hang();
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}
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/* Program UPM using steps outlined by the reference manual */
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for (i = 0; i < size; i++) {
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out_be32(mxmr, (in_be32(mxmr) & mask) | MxMR_OP_WARR | i);
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out_be32(&lbc->mdr, table[i]);
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mdr = in_be32(&lbc->mdr);
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*dummy = 0;
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do {
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mad = in_be32(mxmr) & MxMR_MAD_MSK;
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} while (mad <= old_mad && !(!mad && i == (size-1)));
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old_mad = mad;
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}
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/* Return to normal operation */
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out_be32(mxmr, (in_be32(mxmr) & mask) | MxMR_OP_NORM);
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}
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