mirror of
https://github.com/AsahiLinux/u-boot
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f1683aa73c
This allows us to use the same DRAM init function on all archs. Add a dummy function for arc, which does not use DRAM init here. Signed-off-by: Simon Glass <sjg@chromium.org> [trini: Dummy function on nios2] Signed-off-by: Tom Rini <trini@konsulko.com>
296 lines
7 KiB
C
296 lines
7 KiB
C
/*
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* (C) Copyright 2007
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* Heiko Schocher, DENX Software Engineering, hs@denx.de.
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*
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* (C) Copyright 2004
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* Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <mpc5xxx.h>
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#include <pci.h>
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#include <asm/processor.h>
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#include <libfdt.h>
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#define SDRAM_DDR 0
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#if 1
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/* Settings Icecube */
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#define SDRAM_MODE 0x00CD0000
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#define SDRAM_CONTROL 0x504F0000
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#define SDRAM_CONFIG1 0xD2322800
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#define SDRAM_CONFIG2 0x8AD70000
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#else
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/*Settings Jupiter UB 1.0.0 */
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#define SDRAM_MODE 0x008D0000
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#define SDRAM_CONTROL 0xD04F0000
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#define SDRAM_CONFIG1 0xf7277f00
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#define SDRAM_CONFIG2 0x88b70004
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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#ifndef CONFIG_SYS_RAMBOOT
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static void sdram_start (int hi_addr)
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{
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long hi_addr_bit = hi_addr ? 0x01000000 : 0;
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/* unlock mode register */
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*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000000 | hi_addr_bit;
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__asm__ volatile ("sync");
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/* precharge all banks */
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*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
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__asm__ volatile ("sync");
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#if SDRAM_DDR
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/* set mode register: extended mode */
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*(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_EMODE;
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__asm__ volatile ("sync");
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/* set mode register: reset DLL */
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*(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE | 0x04000000;
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__asm__ volatile ("sync");
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#endif
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/* precharge all banks */
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*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
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__asm__ volatile ("sync");
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/* auto refresh */
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*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 | hi_addr_bit;
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__asm__ volatile ("sync");
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/* set mode register */
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*(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE;
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__asm__ volatile ("sync");
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/* normal operation */
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*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit;
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__asm__ volatile ("sync");
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}
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#endif
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/*
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* ATTENTION: Although partially referenced dram_init does NOT make real use
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* use of CONFIG_SYS_SDRAM_BASE. The code does not work if CONFIG_SYS_SDRAM_BASE
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* is something else than 0x00000000.
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*/
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int dram_init(void)
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{
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ulong dramsize = 0;
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ulong dramsize2 = 0;
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uint svr, pvr;
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#ifndef CONFIG_SYS_RAMBOOT
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ulong test1, test2;
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/* setup SDRAM chip selects */
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*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e;/* 2G at 0x0 */
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*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000;/* disabled */
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__asm__ volatile ("sync");
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/* setup config registers */
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*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1;
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*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2;
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__asm__ volatile ("sync");
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#if SDRAM_DDR
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/* set tap delay */
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*(vu_long *)MPC5XXX_CDM_PORCFG = SDRAM_TAPDELAY;
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__asm__ volatile ("sync");
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#endif
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/* find RAM size using SDRAM CS0 only */
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sdram_start(0);
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test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
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sdram_start(1);
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test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
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if (test1 > test2) {
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sdram_start(0);
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dramsize = test1;
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} else {
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dramsize = test2;
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}
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/* memory smaller than 1MB is impossible */
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if (dramsize < (1 << 20)) {
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dramsize = 0;
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}
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/* set SDRAM CS0 size according to the amount of RAM found */
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if (dramsize > 0) {
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*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 + __builtin_ffs(dramsize >> 20) - 1;
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} else {
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*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
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}
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/* let SDRAM CS1 start right after CS0 */
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*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize + 0x0000001e;/* 2G */
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/* find RAM size using SDRAM CS1 only */
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if (!dramsize)
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sdram_start(0);
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test2 = test1 = get_ram_size((long *)(CONFIG_SYS_SDRAM_BASE + dramsize), 0x80000000);
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if (!dramsize) {
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sdram_start(1);
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test2 = get_ram_size((long *)(CONFIG_SYS_SDRAM_BASE + dramsize), 0x80000000);
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}
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if (test1 > test2) {
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sdram_start(0);
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dramsize2 = test1;
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} else {
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dramsize2 = test2;
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}
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/* memory smaller than 1MB is impossible */
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if (dramsize2 < (1 << 20)) {
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dramsize2 = 0;
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}
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/* set SDRAM CS1 size according to the amount of RAM found */
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if (dramsize2 > 0) {
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*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize
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| (0x13 + __builtin_ffs(dramsize2 >> 20) - 1);
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} else {
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*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize; /* disabled */
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}
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#else /* CONFIG_SYS_RAMBOOT */
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/* retrieve size of memory connected to SDRAM CS0 */
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dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
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if (dramsize >= 0x13) {
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dramsize = (1 << (dramsize - 0x13)) << 20;
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} else {
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dramsize = 0;
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}
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/* retrieve size of memory connected to SDRAM CS1 */
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dramsize2 = *(vu_long *)MPC5XXX_SDRAM_CS1CFG & 0xFF;
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if (dramsize2 >= 0x13) {
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dramsize2 = (1 << (dramsize2 - 0x13)) << 20;
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} else {
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dramsize2 = 0;
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}
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#endif /* CONFIG_SYS_RAMBOOT */
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/*
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* On MPC5200B we need to set the special configuration delay in the
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* DDR controller. Please refer to Freescale's AN3221 "MPC5200B SDRAM
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* Initialization and Configuration", 3.3.1 SDelay--MBAR + 0x0190:
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*
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* "The SDelay should be written to a value of 0x00000004. It is
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* required to account for changes caused by normal wafer processing
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* parameters."
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*/
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svr = get_svr();
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pvr = get_pvr();
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if ((SVR_MJREV(svr) >= 2) &&
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(PVR_MAJ(pvr) == 1) && (PVR_MIN(pvr) == 4)) {
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*(vu_long *)MPC5XXX_SDRAM_SDELAY = 0x04;
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__asm__ volatile ("sync");
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}
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gd->ram_size = dramsize + dramsize2;
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return 0;
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}
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int checkboard (void)
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{
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puts ("Board: Sauter (Jupiter)\n");
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return 0;
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}
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void flash_preinit(void)
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{
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/*
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* Now, when we are in RAM, enable flash write
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* access for detection process.
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* Note that CS_BOOT cannot be cleared when
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* executing in flash.
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*/
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*(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
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}
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int board_early_init_r (void)
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{
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flash_preinit ();
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return 0;
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}
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void flash_afterinit(ulong size)
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{
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if (size == 0x1000000) { /* adjust mapping */
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*(vu_long *)MPC5XXX_BOOTCS_START = *(vu_long *)MPC5XXX_CS0_START =
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START_REG(CONFIG_SYS_BOOTCS_START | size);
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*(vu_long *)MPC5XXX_BOOTCS_STOP = *(vu_long *)MPC5XXX_CS0_STOP =
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STOP_REG(CONFIG_SYS_BOOTCS_START | size, size);
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}
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*(vu_long *)MPC5XXX_ADDECR &= ~(1 << 25); /* disable CS_BOOT */
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*(vu_long *)MPC5XXX_ADDECR |= (1 << 16); /* enable CS0 */
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}
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int update_flash_size (int flash_size)
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{
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flash_afterinit (flash_size);
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return 0;
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}
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int board_early_init_f (void)
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{
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*(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
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return 0;
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}
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#ifdef CONFIG_PCI
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static struct pci_controller hose;
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extern void pci_mpc5xxx_init(struct pci_controller *);
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void pci_init_board(void)
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{
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pci_mpc5xxx_init(&hose);
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}
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#endif
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#if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_RESET)
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void init_ide_reset (void)
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{
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debug ("init_ide_reset\n");
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/* Configure PSC1_4 as GPIO output for ATA reset */
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*(vu_long *) MPC5XXX_WU_GPIO_ENABLE |= GPIO_PSC1_4;
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*(vu_long *) MPC5XXX_WU_GPIO_DIR |= GPIO_PSC1_4;
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/* Deassert reset */
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*(vu_long *) MPC5XXX_WU_GPIO_DATA_O |= GPIO_PSC1_4;
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}
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void ide_set_reset (int idereset)
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{
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debug ("ide_reset(%d)\n", idereset);
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if (idereset) {
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*(vu_long *) MPC5XXX_WU_GPIO_DATA_O &= ~GPIO_PSC1_4;
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/* Make a delay. MPC5200 spec says 25 usec min */
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udelay(500000);
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} else {
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*(vu_long *) MPC5XXX_WU_GPIO_DATA_O |= GPIO_PSC1_4;
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}
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}
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#endif
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#ifdef CONFIG_OF_BOARD_SETUP
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int ft_board_setup(void *blob, bd_t *bd)
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{
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ft_cpu_setup(blob, bd);
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return 0;
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}
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#endif /* CONFIG_OF_BOARD_SETUP */
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