| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * arch/arm/mach-imx/generic.c |
| * |
| * author: Sascha Hauer |
| * Created: april 20th, 2004 |
| * Copyright: Synertronixx GmbH |
| * |
| * Common code for i.MX machines |
| */ |
| |
| #include <common.h> |
| |
| #ifdef CONFIG_IMX |
| |
| #include <asm/arch/imx-regs.h> |
| |
| void imx_gpio_mode(int gpio_mode) |
| { |
| unsigned int pin = gpio_mode & GPIO_PIN_MASK; |
| unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> 5; |
| unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> 10; |
| unsigned int tmp; |
| |
| /* Pullup enable */ |
| if(gpio_mode & GPIO_PUEN) |
| PUEN(port) |= (1<<pin); |
| else |
| PUEN(port) &= ~(1<<pin); |
| |
| /* Data direction */ |
| if(gpio_mode & GPIO_OUT) |
| DDIR(port) |= 1<<pin; |
| else |
| DDIR(port) &= ~(1<<pin); |
| |
| /* Primary / alternate function */ |
| if(gpio_mode & GPIO_AF) |
| GPR(port) |= (1<<pin); |
| else |
| GPR(port) &= ~(1<<pin); |
| |
| /* use as gpio? */ |
| if( ocr == 3 ) |
| GIUS(port) |= (1<<pin); |
| else |
| GIUS(port) &= ~(1<<pin); |
| |
| /* Output / input configuration */ |
| /* FIXME: I'm not very sure about OCR and ICONF, someone |
| * should have a look over it |
| */ |
| if(pin<16) { |
| tmp = OCR1(port); |
| tmp &= ~( 3<<(pin*2)); |
| tmp |= (ocr << (pin*2)); |
| OCR1(port) = tmp; |
| |
| if( gpio_mode & GPIO_AOUT ) |
| ICONFA1(port) &= ~( 3<<(pin*2)); |
| if( gpio_mode & GPIO_BOUT ) |
| ICONFB1(port) &= ~( 3<<(pin*2)); |
| } else { |
| tmp = OCR2(port); |
| tmp &= ~( 3<<((pin-16)*2)); |
| tmp |= (ocr << ((pin-16)*2)); |
| OCR2(port) = tmp; |
| |
| if( gpio_mode & GPIO_AOUT ) |
| ICONFA2(port) &= ~( 3<<((pin-16)*2)); |
| if( gpio_mode & GPIO_BOUT ) |
| ICONFB2(port) &= ~( 3<<((pin-16)*2)); |
| } |
| } |
| |
| #endif /* CONFIG_IMX */ |
