| Haavard Skinnemoen | baf449f | 2008-09-01 14:00:07 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2008 Atmel Corporation |
| 3 | * |
| 4 | * See file CREDITS for list of people who contributed to this |
| 5 | * project. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License as |
| 9 | * published by the Free Software Foundation; either version 2 of |
| 10 | * the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 20 | * MA 02111-1307 USA |
| 21 | */ |
| 22 | #include <common.h> |
| 23 | |
| 24 | #include <asm/io.h> |
| 25 | #include <asm/arch/memory-map.h> |
| 26 | #include <asm/arch/gpio.h> |
| 27 | |
| 28 | void portmux_select_peripheral(void *port, unsigned long pin_mask, |
| 29 | enum portmux_function func, unsigned long flags) |
| 30 | { |
| 31 | /* Both pull-up and pull-down set means buskeeper */ |
| 32 | if (flags & PORTMUX_PULL_DOWN) |
| 33 | gpio_writel(port, PDERS, pin_mask); |
| 34 | else |
| 35 | gpio_writel(port, PDERC, pin_mask); |
| 36 | if (flags & PORTMUX_PULL_UP) |
| 37 | gpio_writel(port, PUERS, pin_mask); |
| 38 | else |
| 39 | gpio_writel(port, PUERC, pin_mask); |
| 40 | |
| 41 | /* Select drive strength */ |
| 42 | if (flags & PORTMUX_DRIVE_LOW) |
| 43 | gpio_writel(port, ODCR0S, pin_mask); |
| 44 | else |
| 45 | gpio_writel(port, ODCR0C, pin_mask); |
| 46 | if (flags & PORTMUX_DRIVE_HIGH) |
| 47 | gpio_writel(port, ODCR1S, pin_mask); |
| 48 | else |
| 49 | gpio_writel(port, ODCR1C, pin_mask); |
| 50 | |
| 51 | /* Select function */ |
| 52 | if (func & PORTMUX_FUNC_B) |
| 53 | gpio_writel(port, PMR0S, pin_mask); |
| 54 | else |
| 55 | gpio_writel(port, PMR0C, pin_mask); |
| 56 | if (func & PORTMUX_FUNC_C) |
| 57 | gpio_writel(port, PMR1S, pin_mask); |
| 58 | else |
| 59 | gpio_writel(port, PMR1C, pin_mask); |
| 60 | |
| 61 | /* Disable GPIO (i.e. enable peripheral) */ |
| 62 | gpio_writel(port, GPERC, pin_mask); |
| 63 | } |
| 64 | |
| 65 | void portmux_select_gpio(void *port, unsigned long pin_mask, |
| 66 | unsigned long flags) |
| 67 | { |
| 68 | /* Both pull-up and pull-down set means buskeeper */ |
| 69 | if (flags & PORTMUX_PULL_DOWN) |
| 70 | gpio_writel(port, PDERS, pin_mask); |
| 71 | else |
| 72 | gpio_writel(port, PDERC, pin_mask); |
| 73 | if (flags & PORTMUX_PULL_UP) |
| 74 | gpio_writel(port, PUERS, pin_mask); |
| 75 | else |
| 76 | gpio_writel(port, PUERC, pin_mask); |
| 77 | |
| 78 | /* Enable open-drain mode if requested */ |
| 79 | if (flags & PORTMUX_OPEN_DRAIN) |
| 80 | gpio_writel(port, ODMERS, pin_mask); |
| 81 | else |
| 82 | gpio_writel(port, ODMERC, pin_mask); |
| 83 | |
| 84 | /* Select drive strength */ |
| 85 | if (flags & PORTMUX_DRIVE_LOW) |
| 86 | gpio_writel(port, ODCR0S, pin_mask); |
| 87 | else |
| 88 | gpio_writel(port, ODCR0C, pin_mask); |
| 89 | if (flags & PORTMUX_DRIVE_HIGH) |
| 90 | gpio_writel(port, ODCR1S, pin_mask); |
| 91 | else |
| 92 | gpio_writel(port, ODCR1C, pin_mask); |
| 93 | |
| 94 | /* Select direction and initial pin state */ |
| 95 | if (flags & PORTMUX_DIR_OUTPUT) { |
| 96 | if (flags & PORTMUX_INIT_HIGH) |
| 97 | gpio_writel(port, OVRS, pin_mask); |
| 98 | else |
| 99 | gpio_writel(port, OVRC, pin_mask); |
| 100 | gpio_writel(port, ODERS, pin_mask); |
| 101 | } else { |
| 102 | gpio_writel(port, ODERC, pin_mask); |
| 103 | } |
| 104 | |
| 105 | /* Enable GPIO */ |
| 106 | gpio_writel(port, GPERS, pin_mask); |
| 107 | } |