| 1 | /* |
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| 2 | * arch/arm/mach-imx/generic.c |
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| 3 | * |
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| 4 | * author: Sascha Hauer |
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| 5 | * Created: april 20th, 2004 |
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| 6 | * Copyright: Synertronixx GmbH |
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| 7 | * |
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| 8 | * Common code for i.MX machines |
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| 9 | * |
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| 10 | * This program is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License as published by |
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| 12 | * the Free Software Foundation; either version 2 of the License, or |
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| 13 | * (at your option) any later version. |
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| 14 | * |
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| 15 | * This program is distributed in the hope that it will be useful, |
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 18 | * GNU General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with this program; if not, write to the Free Software |
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| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 23 | * |
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| 24 | */ |
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| 25 | |
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| 26 | #include <common.h> |
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| 27 | |
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| 28 | #ifdef CONFIG_IMX |
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| 29 | |
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| 30 | #include <asm/arch/imx-regs.h> |
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| 31 | |
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| 32 | void imx_gpio_mode(int gpio_mode) |
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| 33 | { |
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| 34 | unsigned int pin = gpio_mode & GPIO_PIN_MASK; |
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| 35 | unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> 5; |
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| 36 | unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> 10; |
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| 37 | unsigned int tmp; |
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| 38 | |
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| 39 | /* Pullup enable */ |
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| 40 | if(gpio_mode & GPIO_PUEN) |
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| 41 | PUEN(port) |= (1<<pin); |
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| 42 | else |
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| 43 | PUEN(port) &= ~(1<<pin); |
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| 44 | |
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| 45 | /* Data direction */ |
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| 46 | if(gpio_mode & GPIO_OUT) |
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| 47 | DDIR(port) |= 1<<pin; |
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| 48 | else |
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| 49 | DDIR(port) &= ~(1<<pin); |
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| 50 | |
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| 51 | /* Primary / alternate function */ |
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| 52 | if(gpio_mode & GPIO_AF) |
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| 53 | GPR(port) |= (1<<pin); |
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| 54 | else |
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| 55 | GPR(port) &= ~(1<<pin); |
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| 56 | |
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| 57 | /* use as gpio? */ |
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| 58 | if( ocr == 3 ) |
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| 59 | GIUS(port) |= (1<<pin); |
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| 60 | else |
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| 61 | GIUS(port) &= ~(1<<pin); |
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| 62 | |
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| 63 | /* Output / input configuration */ |
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| 64 | /* FIXME: I'm not very sure about OCR and ICONF, someone |
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| 65 | * should have a look over it |
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| 66 | */ |
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| 67 | if(pin<16) { |
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| 68 | tmp = OCR1(port); |
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| 69 | tmp &= ~( 3<<(pin*2)); |
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| 70 | tmp |= (ocr << (pin*2)); |
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| 71 | OCR1(port) = tmp; |
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| 72 | |
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| 73 | if( gpio_mode & GPIO_AOUT ) |
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| 74 | ICONFA1(port) &= ~( 3<<(pin*2)); |
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| 75 | if( gpio_mode & GPIO_BOUT ) |
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| 76 | ICONFB1(port) &= ~( 3<<(pin*2)); |
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| 77 | } else { |
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| 78 | tmp = OCR2(port); |
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| 79 | tmp &= ~( 3<<((pin-16)*2)); |
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| 80 | tmp |= (ocr << ((pin-16)*2)); |
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| 81 | OCR2(port) = tmp; |
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| 82 | |
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| 83 | if( gpio_mode & GPIO_AOUT ) |
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| 84 | ICONFA2(port) &= ~( 3<<((pin-16)*2)); |
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| 85 | if( gpio_mode & GPIO_BOUT ) |
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| 86 | ICONFB2(port) &= ~( 3<<((pin-16)*2)); |
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| 87 | } |
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| 88 | } |
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| 89 | |
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| 90 | #endif /* CONFIG_IMX */ |
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