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Diffstat (limited to 'board/motionpro/motionpro.c')
| -rw-r--r-- | board/motionpro/motionpro.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/board/motionpro/motionpro.c b/board/motionpro/motionpro.c new file mode 100644 index 0000000..d60d233 --- /dev/null +++ b/board/motionpro/motionpro.c @@ -0,0 +1,172 @@ +/* + * (C) Copyright 2003-2007 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * modified for Promess PRO - by Andy Joseph, andy@promessdev.com + * modified for Promess PRO-Motion - by Robert McCullough, rob@promessdev.com + * modified by Chris M. Tumas 6/20/06 Change CAS latency to 2 from 3 + * Also changed the refresh for 100Mhz operation + * + * 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> + + +/* Kollmorgen DPR initialization data */ +struct init_elem { + unsigned long addr; + unsigned len; + char *data; + } init_seq[] = { + {0x500003F2, 2, "\x86\x00"}, /* HW parameter */ + {0x500003F0, 2, "\x00\x00"}, + {0x500003EC, 4, "\x00\x80\xc1\x52"}, /* Magic word */ + }; + +/* + * Initialize Kollmorgen DPR + */ +static void kollmorgen_init(void) +{ + unsigned i, j; + vu_char *p; + + for (i = 0; i < sizeof(init_seq) / sizeof(struct init_elem); ++i) { + p = (vu_char *)init_seq[i].addr; + for (j = 0; j < init_seq[i].len; ++j) + *(p + j) = *(init_seq[i].data + j); + } + + printf("DPR: Kollmorgen DPR initialized\n"); +} + + +/* + * Early board initalization. + */ +int board_early_init_r(void) +{ + /* Now, when we are in RAM, disable Boot Chipselect and enable CS0 */ + *(vu_long *)MPC5XXX_ADDECR &= ~(1 << 25); + *(vu_long *)MPC5XXX_ADDECR |= (1 << 16); + + /* Initialize Kollmorgen DPR */ + kollmorgen_init(); + + return 0; +} + + +#ifndef CFG_RAMBOOT +/* + * Helper function to initialize SDRAM controller. + */ +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; + + /* precharge all banks */ + *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | + hi_addr_bit; + + /* auto refresh */ + *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 | + hi_addr_bit; + + /* auto refresh, second time */ + *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 | + hi_addr_bit; + + /* set mode register */ + *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE; + + /* normal operation */ + *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit; +} +#endif /* !CFG_RAMBOOT */ + + +/* + * Initalize SDRAM - configure SDRAM controller, detect memory size. + */ +long int initdram (int board_type) +{ + ulong dramsize = 0; +#ifndef CFG_RAMBOOT + ulong test1, test2; + + /* configure SDRAM start/end for detection */ + *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e; /* 2G at 0x0 */ + *(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000; /* disabled */ + + /* setup config registers */ + *(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1; + *(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2; + + 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 and disable it */ + *(vu_long *) MPC5XXX_SDRAM_CS1CFG = dramsize; + +#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; +#endif /* CFG_RAMBOOT */ + + /* return total ram size */ + return dramsize; +} + + +int checkboard (void) +{ + puts("Board: Promess Motion-PRO board\n"); + return 0; +} |