| Sergey Kubushyn | e8f3912 | 2007-08-10 20:26:18 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net> |
| 3 | * |
| 4 | * Board-specific low level initialization code. Called at the very end |
| 5 | * of cpu/arm926ejs/davinci/lowlevel_init.S. Just returns if there is no |
| 6 | * initialization required. |
| 7 | * |
| 8 | * For _OLDER_ Sonata boards sets up GPIO4 to control NAND WP line. Newer |
| 9 | * Sonata boards, AFAIK, don't use this so it's just return by default. Ask |
| 10 | * Visioneering if they reinvented the wheel once again to make sure :) |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License as |
| 14 | * published by the Free Software Foundation; either version 2 of |
| 15 | * the License, or (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 25 | * MA 02111-1307 USA |
| 26 | */ |
| 27 | |
| 28 | #include <config.h> |
| 29 | |
| 30 | .globl dv_board_init |
| 31 | dv_board_init: |
| 32 | #ifdef SONATA_BOARD_GPIOWP |
| 33 | /* Set PINMUX0 to enable GPIO4 */ |
| 34 | ldr r0, _PINMUX0 |
| 35 | ldr r1, GPIO4_EN_MASK |
| 36 | ldr r2, [r0] |
| 37 | and r2, r2, r1 |
| 38 | str r2, [r0] |
| 39 | |
| 40 | /* Enable GPIO LPSC module */ |
| 41 | ldr r0, PTSTAT |
| 42 | |
| 43 | gpio_ptstat_loop1: |
| 44 | ldr r2, [r0] |
| 45 | tst r2, $0x00000001 |
| 46 | bne gpio_ptstat_loop1 |
| 47 | |
| 48 | ldr r1, MDCTL_GPIO |
| 49 | ldr r2, [r1] |
| 50 | and r2, r2, $0xfffffff8 |
| 51 | orr r2, r2, $0x00000003 |
| 52 | str r2, [r1] |
| 53 | |
| 54 | orr r2, r2, $0x00000200 |
| 55 | str r2, [r1] |
| 56 | |
| 57 | ldr r1, PTCMD |
| 58 | mov r2, $0x00000001 |
| 59 | str r2, [r1] |
| 60 | |
| 61 | gpio_ptstat_loop2: |
| 62 | ldr r2, [r0] |
| 63 | tst r2, $0x00000001 |
| 64 | bne gpio_ptstat_loop2 |
| 65 | |
| 66 | ldr r0, MDSTAT_GPIO |
| 67 | gpio_mdstat_loop: |
| 68 | ldr r2, [r0] |
| 69 | and r2, r2, $0x0000001f |
| 70 | teq r2, $0x00000003 |
| 71 | bne gpio_mdstat_loop |
| 72 | |
| 73 | /* GPIO4 -> output */ |
| 74 | ldr r0, GPIO_DIR01 |
| 75 | mov r1, $0x10 |
| 76 | ldr r2, [r0] |
| 77 | bic r2, r2, r0 |
| 78 | str r2, [r0] |
| 79 | |
| 80 | /* Set it to 0 (Write Protect) */ |
| 81 | ldr r0, GPIO_CLR_DATA01 |
| 82 | str r1, [r0] |
| 83 | #endif |
| 84 | |
| 85 | mov pc, lr |
| 86 | |
| 87 | #ifdef SONATA_BOARD_GPIOWP |
| 88 | .ltorg |
| 89 | |
| 90 | GPIO4_EN_MASK: |
| 91 | .word 0xf77fffff |
| 92 | MDCTL_GPIO: |
| 93 | .word 0x01c41a68 |
| 94 | MDSTAT_GPIO: |
| 95 | .word 0x01c41868 |
| 96 | GPIO_DIR01: |
| 97 | .word 0x01c67010 |
| 98 | GPIO_CLR_DATA01: |
| 99 | .word 0x01c6701c |
| 100 | #endif |