+++ /dev/null
-/*
- * (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;
-}
projects / karo-tx-uboot.git / blobdiff