/* * (C) Copyright 2003-2006 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2004 * Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <mpc5xxx.h> #include <asm/processor.h> #ifndef CFG_RAMBOOT static void sdram_start(int hi_addr) { long hi_addr_bit = hi_addr ? 0x01000000 : 0; /* unlock mode register */ *(vu_long *) MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000000 | hi_addr_bit; __asm__ volatile ("sync"); /* precharge all banks */ *(vu_long *) MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit; __asm__ volatile ("sync"); #if SDRAM_DDR /* set mode register: extended mode */ *(vu_long *) MPC5XXX_SDRAM_MODE = SDRAM_EMODE; __asm__ volatile ("sync"); /* set mode register: reset DLL */ *(vu_long *) MPC5XXX_SDRAM_MODE = SDRAM_MODE | 0x04000000; __asm__ volatile ("sync"); #endif /* SDRAM_DDR */ /* precharge all banks */ *(vu_long *) MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit; __asm__ volatile ("sync"); /* auto refresh */ *(vu_long *) MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 | hi_addr_bit; __asm__ volatile ("sync"); /* set mode register */ *(vu_long *) MPC5XXX_SDRAM_MODE = SDRAM_MODE; __asm__ volatile ("sync"); /* normal operation */ *(vu_long *) MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit; __asm__ volatile ("sync"); } #endif /* !CFG_RAMBOOT */ phys_size_t initdram(int board_type) { ulong dramsize = 0; ulong dramsize2 = 0; uint svr, pvr; #ifndef CFG_RAMBOOT ulong test1, test2; /* setup SDRAM chip selects */ *(vu_long *) MPC5XXX_SDRAM_CS0CFG = 0x0000001e; /* 2G at 0x0 */ *(vu_long *) MPC5XXX_SDRAM_CS1CFG = 0x80000000; /* disabled */ __asm__ volatile ("sync"); /* setup config registers */ *(vu_long *) MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1; *(vu_long *) MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2; __asm__ volatile ("sync"); #if SDRAM_DDR /* set tap delay */ *(vu_long *) MPC5XXX_CDM_PORCFG = SDRAM_TAPDELAY; __asm__ volatile ("sync"); #endif /* SDRAM_DDR */ /* find RAM size using SDRAM CS0 only */ sdram_start(0); test1 = get_ram_size((long *)CFG_SDRAM_BASE, 0x80000000); sdram_start(1); test2 = get_ram_size((long *)CFG_SDRAM_BASE, 0x80000000); if (test1 > test2) { sdram_start(0); dramsize = test1; } else dramsize = test2; /* memory smaller than 1MB is impossible */ if (dramsize < (1 << 20)) dramsize = 0; /* set SDRAM CS0 size according to the amount of RAM found */ if (dramsize > 0) *(vu_long *) MPC5XXX_SDRAM_CS0CFG = 0x13 + __builtin_ffs(dramsize >> 20) - 1; else *(vu_long *) MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */ /* let SDRAM CS1 start right after CS0 */ *(vu_long *) MPC5XXX_SDRAM_CS1CFG = dramsize + 0x0000001e;/* 2G */ /* find RAM size using SDRAM CS1 only */ if (!dramsize) sdram_start(0); test2 = test1 = get_ram_size((long *) (CFG_SDRAM_BASE + dramsize), 0x80000000); if (!dramsize) { sdram_start(1); test2 = get_ram_size((long *) (CFG_SDRAM_BASE + dramsize), 0x80000000); } if (test1 > test2) { sdram_start(0); dramsize2 = test1; } else dramsize2 = test2; /* memory smaller than 1MB is impossible */ if (dramsize2 < (1 << 20)) dramsize2 = 0; /* set SDRAM CS1 size according to the amount of RAM found */ if (dramsize2 > 0) *(vu_long *) MPC5XXX_SDRAM_CS1CFG = dramsize | (0x13 + __builtin_ffs(dramsize2 >> 20) - 1); else *(vu_long *) MPC5XXX_SDRAM_CS1CFG = dramsize; /* disabled */ #else /* CFG_RAMBOOT */ /* retrieve size of memory connected to SDRAM CS0 */ dramsize = *(vu_long *) MPC5XXX_SDRAM_CS0CFG & 0xFF; if (dramsize >= 0x13) dramsize = (1 << (dramsize - 0x13)) << 20; else dramsize = 0; /* retrieve size of memory connected to SDRAM CS1 */ dramsize2 = *(vu_long *) MPC5XXX_SDRAM_CS1CFG & 0xFF; if (dramsize2 >= 0x13) dramsize2 = (1 << (dramsize2 - 0x13)) << 20; else dramsize2 = 0; #endif /* CFG_RAMBOOT */ /* * On MPC5200B we need to set the special configuration delay in the * DDR controller. Please refer to Freescale's AN3221 "MPC5200B SDRAM * Initialization and Configuration", 3.3.1 SDelay--MBAR + 0x0190: * * "The SDelay should be written to a value of 0x00000004. It is * required to account for changes caused by normal wafer processing * parameters." */ svr = get_svr(); pvr = get_pvr(); if ((SVR_MJREV(svr) >= 2) && (PVR_MAJ(pvr) == 1) && (PVR_MIN(pvr) == 4)) { *(vu_long *) MPC5XXX_SDRAM_SDELAY = 0x04; __asm__ volatile ("sync"); } return dramsize + dramsize2; } int checkboard (void) { puts("Board: MarelV38B\n"); return 0; } int board_early_init_f(void) { #ifdef CONFIG_HW_WATCHDOG /* * Enable and configure the direction (output) of PSC3_9 - watchdog * reset input. Refer to 7.3.2.2.[1,3,4] of the MPC5200B User's * Manual. */ *(vu_long *) MPC5XXX_WU_GPIO_ENABLE |= GPIO_PSC3_9; *(vu_long *) MPC5XXX_WU_GPIO_DIR |= GPIO_PSC3_9; #endif /* CONFIG_HW_WATCHDOG */ return 0; } int board_early_init_r(void) { /* * Now, when we are in RAM, enable flash write access for the * detection process. Note that CS_BOOT cannot be cleared when * executing in flash. */ *(vu_long *) MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */ /* * Enable GPIO_WKUP_7 to "read the status of the actual power * situation". Default direction is input, so no need to set it * explicitly. */ *(vu_long *) MPC5XXX_WU_GPIO_ENABLE |= GPIO_WKUP_7; return 0; } #if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_RESET) void init_ide_reset(void) { debug("init_ide_reset\n"); /* Configure PSC1_4 as GPIO output for ATA reset */ *(vu_long *) MPC5XXX_WU_GPIO_ENABLE |= GPIO_PSC1_4; *(vu_long *) MPC5XXX_WU_GPIO_DIR |= GPIO_PSC1_4; /* Deassert reset */ *(vu_long *) MPC5XXX_WU_GPIO_DATA_O |= GPIO_PSC1_4; } void ide_set_reset(int idereset) { debug("ide_reset(%d)\n", idereset); if (idereset) { *(vu_long *) MPC5XXX_WU_GPIO_DATA_O &= ~GPIO_PSC1_4; /* Make a delay. MPC5200 spec says 25 usec min */ udelay(500000); } else *(vu_long *) MPC5XXX_WU_GPIO_DATA_O |= GPIO_PSC1_4; } #endif #ifdef CONFIG_HW_WATCHDOG void hw_watchdog_reset(void) { /* * MarelV38B has a TPS3705 watchdog. Spec says that to kick the dog * we need a positive or negative transition on WDI i.e., our PSC3_9. */ *(vu_long *) MPC5XXX_WU_GPIO_DATA_O ^= GPIO_PSC3_9; } #endif /* CONFIG_HW_WATCHDOG */