/* * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * 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 "mpc8xx.h" #include <linux/mtd/doc2000.h> extern int kbd_init(void); extern int drv_kbd_init(void); /* ------------------------------------------------------------------------- */ static long int dram_size (long int, long int *, long int); /* ------------------------------------------------------------------------- */ #define _NOT_USED_ 0xFFFFFFFF const uint sdram_table[] = { /* * Single Read. (Offset 0 in UPMA RAM) */ 0x1F07FC04, 0xEEAEFC04, 0x11ADFC04, 0xEFBBBC00, 0x1FF77C47, /* last */ /* * SDRAM Initialization (offset 5 in UPMA RAM) * * This is no UPM entry point. The following definition uses * the remaining space to establish an initialization * sequence, which is executed by a RUN command. * */ 0x1FF77C34, 0xEFEABC34, 0x1FB57C35, /* last */ /* * Burst Read. (Offset 8 in UPMA RAM) */ 0x1F07FC04, 0xEEAEFC04, 0x10ADFC04, 0xF0AFFC00, 0xF0AFFC00, 0xF1AFFC00, 0xEFBBBC00, 0x1FF77C47, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Single Write. (Offset 18 in UPMA RAM) */ 0x1F27FC04, 0xEEAEBC00, 0x01B93C04, 0x1FF77C47, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Burst Write. (Offset 20 in UPMA RAM) */ 0x1F07FC04, 0xEEAEBC00, 0x10AD7C00, 0xF0AFFC00, 0xF0AFFC00, 0xE1BBBC04, 0x1FF77C47, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Refresh (Offset 30 in UPMA RAM) */ 0x1FF5FC84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC84, 0xFFFFFC07, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Exception. (Offset 3c in UPMA RAM) */ 0x1FF7FC07, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, }; const uint static_table[] = { /* * Single Read. (Offset 0 in UPMA RAM) */ 0x0FFFFC04, 0x0FF3FC04, 0x0FF3CC04, 0x0FF3CC04, 0x0FF3EC04, 0x0FF3CC00, 0x0FF7FC04, 0x3FFFFC04, 0xFFFFFC04, 0xFFFFFC05, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, /* * Single Write. (Offset 18 in UPMA RAM) */ 0x0FFFFC04, 0x00FFFC04, 0x00FFFC04, 0x00FFFC04, 0x01FFFC00, 0x3FFFFC04, 0xFFFFFC04, 0xFFFFFC05, /* last */ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, }; /* ------------------------------------------------------------------------- */ /* * Check Board Identity: * * Test TQ ID string (TQM8xx...) * If present, check for "L" type (no second DRAM bank), * otherwise "L" type is assumed as default. * * Return 1 for "L" type, 0 else. */ int checkboard (void) { char *s = getenv ("serial#"); if (!s || strncmp (s, "TQM8", 4)) { printf ("### No HW ID - assuming RBC823\n"); return (0); } puts (s); putc ('\n'); return (0); } /* ------------------------------------------------------------------------- */ phys_size_t initdram (int board_type) { volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; volatile memctl8xx_t *memctl = &immap->im_memctl; long int size_b0, size8, size9; upmconfig (UPMA, (uint *) sdram_table, sizeof (sdram_table) / sizeof (uint)); /* * 1 Bank of 64Mbit x 2 devices */ memctl->memc_mptpr = CONFIG_SYS_MPTPR_1BK_4K; memctl->memc_mar = 0x00000088; /* * Map controller SDRAM bank 0 */ memctl->memc_or4 = CONFIG_SYS_OR4_PRELIM; memctl->memc_br4 = CONFIG_SYS_BR4_PRELIM; memctl->memc_mamr = CONFIG_SYS_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */ udelay (200); /* * Perform SDRAM initializsation sequence */ memctl->memc_mcr = 0x80008105; /* SDRAM bank 0 */ udelay (1); memctl->memc_mamr = (CONFIG_SYS_MAMR_8COL & ~(MAMR_TLFA_MSK)) | MAMR_TLFA_8X; udelay (200); memctl->memc_mcr = 0x80008130; /* SDRAM bank 0 - execute twice */ udelay (1); memctl->memc_mamr = (CONFIG_SYS_MAMR_8COL & ~(MAMR_TLFA_MSK)) | MAMR_TLFA_4X; udelay (200); memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */ udelay (1000); /* * Preliminary prescaler for refresh (depends on number of * banks): This value is selected for four cycles every 62.4 us * with two SDRAM banks or four cycles every 31.2 us with one * bank. It will be adjusted after memory sizing. */ memctl->memc_mptpr = CONFIG_SYS_MPTPR_2BK_4K; /* 16: but should be: CONFIG_SYS_MPTPR_1BK_4K */ /* * Check Bank 0 Memory Size for re-configuration * * try 8 column mode */ size8 = dram_size (CONFIG_SYS_MAMR_8COL, (long *) SDRAM_BASE4_PRELIM, SDRAM_MAX_SIZE); udelay (1000); /* * try 9 column mode */ size9 = dram_size (CONFIG_SYS_MAMR_9COL, (long *) SDRAM_BASE4_PRELIM, SDRAM_MAX_SIZE); if (size8 < size9) { /* leave configuration at 9 columns */ size_b0 = size9; /* debug ("SDRAM Bank 0 in 9 column mode: %ld MB\n", size >> 20); */ } else { /* back to 8 columns */ size_b0 = size8; memctl->memc_mamr = CONFIG_SYS_MAMR_8COL; udelay (500); /* debug ("SDRAM Bank 0 in 8 column mode: %ld MB\n", size >> 20); */ } udelay (1000); /* * Adjust refresh rate depending on SDRAM type, both banks * For types > 128 MBit leave it at the current (fast) rate */ if ((size_b0 < 0x02000000)) { /* reduce to 15.6 us (62.4 us / quad) */ memctl->memc_mptpr = CONFIG_SYS_MPTPR_2BK_4K; udelay (1000); } /* SDRAM Bank 0 is bigger - map first */ memctl->memc_or4 = ((-size_b0) & 0xFFFF0000) | CONFIG_SYS_OR_TIMING_SDRAM; memctl->memc_br4 = (CONFIG_SYS_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V; udelay (10000); return (size_b0); } /* ------------------------------------------------------------------------- */ /* * Check memory range for valid RAM. A simple memory test determines * the actually available RAM size between addresses `base' and * `base + maxsize'. Some (not all) hardware errors are detected: * - short between address lines * - short between data lines */ static long int dram_size (long int mamr_value, long int *base, long int maxsize) { volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; volatile memctl8xx_t *memctl = &immap->im_memctl; memctl->memc_mamr = mamr_value; return (get_ram_size (base, maxsize)); } #ifdef CONFIG_CMD_DOC void doc_init (void) { volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; volatile memctl8xx_t *memctl = &immap->im_memctl; upmconfig (UPMB, (uint *) static_table, sizeof (static_table) / sizeof (uint)); memctl->memc_mbmr = MAMR_DSA_1_CYCL; doc_probe (FLASH_BASE1_PRELIM); } #endif