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author | Stefan Roese <sr@denx.de> | 2006-11-10 07:48:47 +0100 |
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committer | Stefan Roese <sr@denx.de> | 2006-11-10 07:48:47 +0100 |
commit | dfc8a9ee0040e53ada125a3c52f241e37f09cf28 (patch) | |
tree | 60fd3973150a4e6b3d9d129d117ecab71b5edabe /board/v38b/v38b.c | |
parent | 5c912cb1c31266c66ca59b36f9b6f87296421d75 (diff) | |
parent | 91650b3e4de688038d4f71279c44858e3e2c6870 (diff) | |
download | u-boot-imx-dfc8a9ee0040e53ada125a3c52f241e37f09cf28.zip u-boot-imx-dfc8a9ee0040e53ada125a3c52f241e37f09cf28.tar.gz u-boot-imx-dfc8a9ee0040e53ada125a3c52f241e37f09cf28.tar.bz2 |
Merge with /home/stefan/git/u-boot/denx
Diffstat (limited to 'board/v38b/v38b.c')
-rw-r--r-- | board/v38b/v38b.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/board/v38b/v38b.c b/board/v38b/v38b.c new file mode 100644 index 0000000..dede996 --- /dev/null +++ b/board/v38b/v38b.c @@ -0,0 +1,260 @@ +/* + * (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 */ + + +long int 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_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 */ + +#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 */ + + /* + * 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 (CFG_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 /* defined (CFG_CMD_IDE) && defined (CONFIG_IDE_RESET) */ + + +#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 */ |