| Rajeshwari Shinde | bed2442 | 2013-07-04 12:29:17 +0530 | [diff] [blame^] | 1 | /* |
| 2 | * Lowlevel setup for EXYNOS5 based board |
| 3 | * |
| 4 | * Copyright (C) 2013 Samsung Electronics |
| 5 | * Rajeshwari Shinde <rajeshwari.s@samsung.com> |
| 6 | * |
| 7 | * See file CREDITS for list of people who contributed to this |
| 8 | * project. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License as |
| 12 | * published by the Free Software Foundation; either version 2 of |
| 13 | * the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 23 | * MA 02111-1307 USA |
| 24 | */ |
| 25 | |
| 26 | #include <common.h> |
| 27 | #include <config.h> |
| 28 | #include <asm/arch/cpu.h> |
| 29 | #include <asm/arch/dmc.h> |
| 30 | #include <asm/arch/power.h> |
| 31 | #include <asm/arch/tzpc.h> |
| 32 | #include <asm/arch/periph.h> |
| 33 | #include <asm/arch/pinmux.h> |
| 34 | #include "common_setup.h" |
| 35 | |
| 36 | /* These are the things we can do during low-level init */ |
| 37 | enum { |
| 38 | DO_WAKEUP = 1 << 0, |
| 39 | DO_CLOCKS = 1 << 1, |
| 40 | DO_MEM_RESET = 1 << 2, |
| 41 | DO_UART = 1 << 3, |
| 42 | }; |
| 43 | |
| 44 | int do_lowlevel_init(void) |
| 45 | { |
| 46 | uint32_t reset_status; |
| 47 | int actions = 0; |
| 48 | |
| 49 | arch_cpu_init(); |
| 50 | |
| 51 | reset_status = get_reset_status(); |
| 52 | |
| 53 | switch (reset_status) { |
| 54 | case S5P_CHECK_SLEEP: |
| 55 | actions = DO_CLOCKS | DO_WAKEUP; |
| 56 | break; |
| 57 | case S5P_CHECK_DIDLE: |
| 58 | case S5P_CHECK_LPA: |
| 59 | actions = DO_WAKEUP; |
| 60 | break; |
| 61 | default: |
| 62 | /* This is a normal boot (not a wake from sleep) */ |
| 63 | actions = DO_CLOCKS | DO_MEM_RESET; |
| 64 | } |
| 65 | |
| 66 | if (actions & DO_CLOCKS) { |
| 67 | system_clock_init(); |
| 68 | mem_ctrl_init(actions & DO_MEM_RESET); |
| 69 | tzpc_init(); |
| 70 | } |
| 71 | |
| 72 | return actions & DO_WAKEUP; |
| 73 | } |