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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2007-07-05 18:02:15 +0200 |
|---|---|---|
| committer | Sascha Hauer <sha@octopus.labnet.pengutronix.de> | 2007-07-05 18:02:15 +0200 |
| commit | 231e867072671479534007b77ae2db54308abc3c (patch) | |
| tree | f1908a66168c76ff6dd4d1e8761a450a81d4de23 /arch/arm | |
| parent | 875827e3413b2f754f579e7fe29370f6bdc5306f (diff) | |
| download | barebox-231e867072671479534007b77ae2db54308abc3c.tar.gz barebox-231e867072671479534007b77ae2db54308abc3c.tar.xz | |
svn_rev_667
move gpio.c
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-imx/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-imx/gpio.c | 87 |
2 files changed, 88 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index f3e555e25b..4925647289 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -1,2 +1,3 @@ obj-y += clocksource.o obj-y += speed.o +obj-y += gpio.o diff --git a/arch/arm/mach-imx/gpio.c b/arch/arm/mach-imx/gpio.c new file mode 100644 index 0000000000..8b1cfcbb6d --- /dev/null +++ b/arch/arm/mach-imx/gpio.c @@ -0,0 +1,87 @@ +/* + * arch/arm/mach-imx/gpio.c + * + * author: Sascha Hauer + * Created: april 20th, 2004 + * Copyright: Synertronixx GmbH + * + * Common code for i.MX machines + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <common.h> +#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)); + } + +} + |