diff options
Diffstat (limited to 'board/pcippc2/cpc710_init_ram.c')
| -rw-r--r-- | board/pcippc2/cpc710_init_ram.c | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/board/pcippc2/cpc710_init_ram.c b/board/pcippc2/cpc710_init_ram.c deleted file mode 100644 index 8945351a4d..0000000000 --- a/board/pcippc2/cpc710_init_ram.c +++ /dev/null @@ -1,232 +0,0 @@ -/* - * (C) Copyright 2002 - * 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 <config.h> -#include <common.h> -#include <asm/io.h> - -#include "pcippc2.h" -#include "i2c.h" - -typedef struct cpc710_mem_org_s { - u8 rows; - u8 cols; - u8 banks2; - u8 org; -} cpc710_mem_org_t; - -static int cpc710_compute_mcer (u32 * mcer, - unsigned long *size, unsigned int sdram); -static int cpc710_eeprom_checksum (unsigned int sdram); -static u8 cpc710_eeprom_read (unsigned int sdram, unsigned int offset); - -static u32 cpc710_mcer_mem[] = { - 0x000003f3, /* 18 lines, 4 Mb */ - 0x000003e3, /* 19 lines, 8 Mb */ - 0x000003c3, /* 20 lines, 16 Mb */ - 0x00000383, /* 21 lines, 32 Mb */ - 0x00000303, /* 22 lines, 64 Mb */ - 0x00000203, /* 23 lines, 128 Mb */ - 0x00000003, /* 24 lines, 256 Mb */ - 0x00000002, /* 25 lines, 512 Mb */ - 0x00000001 /* 26 lines, 1024 Mb */ -}; -static cpc710_mem_org_t cpc710_mem_org[] = { - {0x0c, 0x09, 0x02, 0x00}, /* 0000: 12/ 9/2 */ - {0x0d, 0x09, 0x02, 0x00}, /* 0000: 13/ 9/2 */ - {0x0d, 0x0a, 0x02, 0x00}, /* 0000: 13/10/2 */ - {0x0d, 0x0b, 0x02, 0x00}, /* 0000: 13/11/2 */ - {0x0d, 0x0c, 0x02, 0x00}, /* 0000: 13/12/2 */ - {0x0e, 0x0c, 0x02, 0x00}, /* 0000: 14/12/2 */ - {0x0b, 0x08, 0x02, 0x01}, /* 0001: 11/ 8/2 */ - {0x0b, 0x09, 0x01, 0x02}, /* 0010: 11/ 9/1 */ - {0x0b, 0x0a, 0x01, 0x03}, /* 0011: 11/10/1 */ - {0x0c, 0x08, 0x02, 0x04}, /* 0100: 12/ 8/2 */ - {0x0c, 0x0a, 0x02, 0x05}, /* 0101: 12/10/2 */ - {0x0d, 0x08, 0x01, 0x06}, /* 0110: 13/ 8/1 */ - {0x0d, 0x08, 0x02, 0x07}, /* 0111: 13/ 8/2 */ - {0x0d, 0x09, 0x01, 0x08}, /* 1000: 13/ 9/1 */ - {0x0d, 0x0a, 0x01, 0x09}, /* 1001: 13/10/1 */ - {0x0b, 0x08, 0x01, 0x0a}, /* 1010: 11/ 8/1 */ - {0x0c, 0x08, 0x01, 0x0b}, /* 1011: 12/ 8/1 */ - {0x0c, 0x09, 0x01, 0x0c}, /* 1100: 12/ 9/1 */ - {0x0e, 0x09, 0x02, 0x0d}, /* 1101: 14/ 9/2 */ - {0x0e, 0x0a, 0x02, 0x0e}, /* 1110: 14/10/2 */ - {0x0e, 0x0b, 0x02, 0x0f} /* 1111: 14/11/2 */ -}; - -unsigned long cpc710_ram_init (void) -{ - unsigned long memsize = 0; - unsigned long bank_size; - u32 mcer; - -#ifndef CONFIG_SYS_RAMBOOT - /* Clear memory banks - */ - out32 (REG (SDRAM0, MCER0), 0); - out32 (REG (SDRAM0, MCER1), 0); - out32 (REG (SDRAM0, MCER2), 0); - out32 (REG (SDRAM0, MCER3), 0); - out32 (REG (SDRAM0, MCER4), 0); - out32 (REG (SDRAM0, MCER5), 0); - out32 (REG (SDRAM0, MCER6), 0); - out32 (REG (SDRAM0, MCER7), 0); - iobarrier_rw (); - - /* Disable memory - */ - out32 (REG (SDRAM0, MCCR), 0x13b06000); - iobarrier_rw (); -#endif - - /* Only the first memory bank is initialised now - */ - if (!cpc710_compute_mcer (&mcer, &bank_size, 0)) { - puts ("Unsupported SDRAM type !\n"); - hang (); - } - memsize += bank_size; -#ifndef CONFIG_SYS_RAMBOOT - /* Enable bank, zero start - */ - out32 (REG (SDRAM0, MCER0), mcer | 0x80000000); - iobarrier_rw (); -#endif - -#ifndef CONFIG_SYS_RAMBOOT - /* Enable memory - */ - out32 (REG (SDRAM0, MCCR), in32 (REG (SDRAM0, MCCR)) | 0x80000000); - - /* Wait until initialisation finished - */ - while (!(in32 (REG (SDRAM0, MCCR)) & 0x20000000)) { - iobarrier_rw (); - } - - /* Clear Memory Error Status and Address registers - */ - out32 (REG (SDRAM0, MESR), 0); - out32 (REG (SDRAM0, MEAR), 0); - iobarrier_rw (); - - /* ECC is not configured now - */ -#endif - - /* Memory size counter - */ - out32 (REG (CPC0, RGBAN1), memsize); - - return memsize; -} - -static int cpc710_compute_mcer (u32 * mcer, unsigned long *size, unsigned int sdram) -{ - u8 rows; - u8 cols; - u8 banks2; - unsigned int lines; - u32 mc = 0; - unsigned int i; - cpc710_mem_org_t *org = 0; - - if (!i2c_reset ()) { - puts ("Can't reset I2C!\n"); - hang (); - } - - if (!cpc710_eeprom_checksum (sdram)) { - puts ("Invalid EEPROM checksum !\n"); - hang (); - } - - rows = cpc710_eeprom_read (sdram, 3); - cols = cpc710_eeprom_read (sdram, 4); - /* Can be 2 or 4 banks; divide by 2 - */ - banks2 = cpc710_eeprom_read (sdram, 17) / 2; - - lines = rows + cols + banks2; - - if (lines < 18 || lines > 26) { - /* Unsupported configuration - */ - return 0; - } - - mc |= cpc710_mcer_mem[lines - 18] << 6; - - for (i = 0; i < sizeof (cpc710_mem_org) / sizeof (cpc710_mem_org_t); - i++) { - cpc710_mem_org_t *corg = cpc710_mem_org + i; - - if (corg->rows == rows && corg->cols == cols - && corg->banks2 == banks2) { - org = corg; - - break; - } - } - - if (!org) { - /* Unsupported configuration - */ - return 0; - } - - mc |= (u32) org->org << 2; - - /* Supported configuration - */ - *mcer = mc; - *size = 1l << (lines + 4); - - return 1; -} - -static int cpc710_eeprom_checksum (unsigned int sdram) -{ - u8 sum = 0; - unsigned int i; - - for (i = 0; i < 63; i++) { - sum += cpc710_eeprom_read (sdram, i); - } - - return sum == cpc710_eeprom_read (sdram, 63); -} - -static u8 cpc710_eeprom_read (unsigned int sdram, unsigned int offset) -{ - u8 dev = (sdram << 1) | 0xa0; - u8 data; - - if (!i2c_read_byte (&data, dev, offset)) { - puts ("I2C error !\n"); - hang (); - } - - return data; -} |