1 /* 2 * arch/arm/mach-imx/generic.c 3 * 4 * author: Sascha Hauer 5 * Created: april 20th, 2004 6 * Copyright: Synertronixx GmbH 7 * 8 * Common code for i.MX machines 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (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, MA 02111-1307 USA 23 * 24 */ 25 26 #include <common.h> 27 28 #ifdef CONFIG_IMX 29 30 #include <asm/arch/imx-regs.h> 31 32 void imx_gpio_mode(int gpio_mode) 33 { 34 unsigned int pin = gpio_mode & GPIO_PIN_MASK; 35 unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> 5; 36 unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> 10; 37 unsigned int tmp; 38 39 /* Pullup enable */ 40 if(gpio_mode & GPIO_PUEN) 41 PUEN(port) |= (1<<pin); 42 else 43 PUEN(port) &= ~(1<<pin); 44 45 /* Data direction */ 46 if(gpio_mode & GPIO_OUT) 47 DDIR(port) |= 1<<pin; 48 else 49 DDIR(port) &= ~(1<<pin); 50 51 /* Primary / alternate function */ 52 if(gpio_mode & GPIO_AF) 53 GPR(port) |= (1<<pin); 54 else 55 GPR(port) &= ~(1<<pin); 56 57 /* use as gpio? */ 58 if( ocr == 3 ) 59 GIUS(port) |= (1<<pin); 60 else 61 GIUS(port) &= ~(1<<pin); 62 63 /* Output / input configuration */ 64 /* FIXME: I'm not very sure about OCR and ICONF, someone 65 * should have a look over it 66 */ 67 if(pin<16) { 68 tmp = OCR1(port); 69 tmp &= ~( 3<<(pin*2)); 70 tmp |= (ocr << (pin*2)); 71 OCR1(port) = tmp; 72 73 if( gpio_mode & GPIO_AOUT ) 74 ICONFA1(port) &= ~( 3<<(pin*2)); 75 if( gpio_mode & GPIO_BOUT ) 76 ICONFB1(port) &= ~( 3<<(pin*2)); 77 } else { 78 tmp = OCR2(port); 79 tmp &= ~( 3<<((pin-16)*2)); 80 tmp |= (ocr << ((pin-16)*2)); 81 OCR2(port) = tmp; 82 83 if( gpio_mode & GPIO_AOUT ) 84 ICONFA2(port) &= ~( 3<<((pin-16)*2)); 85 if( gpio_mode & GPIO_BOUT ) 86 ICONFB2(port) &= ~( 3<<((pin-16)*2)); 87 } 88 } 89 90 #endif /* CONFIG_IMX */ 91