| Matthias Kaehlcke | fcfb632 | 2010-02-01 21:29:39 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Low-level initialization for EP93xx |
| 3 | * |
| 4 | * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net> |
| 5 | * |
| 6 | * Copyright (C) 2006 Dominic Rath <Dominic.Rath@gmx.de> |
| 7 | * |
| 8 | * See file CREDITS for list of people who contributed to this |
| 9 | * project. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License as |
| 13 | * published by the Free Software Foundation; either version 2 of |
| 14 | * the License, or (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 24 | * MA 02111-1307 USA |
| 25 | */ |
| 26 | |
| 27 | #include <version.h> |
| 28 | #include <asm/arch/ep93xx.h> |
| 29 | |
| 30 | .globl lowlevel_init |
| 31 | lowlevel_init: |
| 32 | /* backup return address */ |
| 33 | ldr r1, =SYSCON_SCRATCH0 |
| 34 | str lr, [r1] |
| 35 | |
| 36 | /* Turn on both LEDs */ |
| 37 | bl red_LED_on |
| 38 | bl green_LED_on |
| 39 | |
| 40 | /* Configure flash wait states before we switch to the PLL */ |
| 41 | bl flash_cfg |
| 42 | |
| 43 | /* Set up PLL */ |
| 44 | bl pll_cfg |
| 45 | |
| 46 | /* Turn off the Green LED and leave the Red LED on */ |
| 47 | bl green_LED_off |
| 48 | |
| 49 | /* Setup SDRAM */ |
| 50 | bl sdram_cfg |
| 51 | |
| 52 | /* Turn on Green LED, Turn off the Red LED */ |
| 53 | bl green_LED_on |
| 54 | bl red_LED_off |
| 55 | |
| 56 | /* FIXME: we use async mode for now */ |
| 57 | mrc p15, 0, r0, c1, c0, 0 |
| 58 | orr r0, r0, #0xc0000000 |
| 59 | mcr p15, 0, r0, c1, c0, 0 |
| 60 | |
| 61 | /* restore return address */ |
| 62 | ldr r1, =SYSCON_SCRATCH0 |
| 63 | ldr lr, [r1] |
| 64 | |
| 65 | mov pc, lr |