diff options
| -rw-r--r-- | sys/arch/arm/xscale/pxa2x0_gpio.c | 79 |
1 files changed, 78 insertions, 1 deletions
diff --git a/sys/arch/arm/xscale/pxa2x0_gpio.c b/sys/arch/arm/xscale/pxa2x0_gpio.c index d928f1b7995..8a5766894d4 100644 --- a/sys/arch/arm/xscale/pxa2x0_gpio.c +++ b/sys/arch/arm/xscale/pxa2x0_gpio.c @@ -1,4 +1,4 @@ -/* $OpenBSD: pxa2x0_gpio.c,v 1.9 2005/01/11 21:03:37 drahn Exp $ */ +/* $OpenBSD: pxa2x0_gpio.c,v 1.10 2005/01/13 20:46:28 drahn Exp $ */ /* $NetBSD: pxa2x0_gpio.c,v 1.2 2003/07/15 00:24:55 lukem Exp $ */ /* @@ -538,3 +538,80 @@ pxa2x0_gpio_set_function(u_int gpio, u_int fn) return (oldfn); } + +/* + * Quick function to read pin value + */ +int +pxa2x0_gpio_get_bit(u_int gpio) +{ + struct pxagpio_softc *sc = pxagpio_softc; + int bit; + + bit = GPIO_BIT(gpio); + if (pxagpio_reg_read(sc, GPIO_REG(GPIO_GPLR0, gpio)) & bit) + return 1; + else + return 0; +} + +/* + * Quick function to set pin to 1 + */ +void +pxa2x0_gpio_set_bit(u_int gpio) +{ + struct pxagpio_softc *sc = pxagpio_softc; + int bit; + + bit = GPIO_BIT(gpio); + pxagpio_reg_write(sc, GPIO_REG(GPIO_GPSR0, gpio), bit); +} + +/* + * Quick function to set pin to 1 + */ +void +pxa2x0_gpio_clear_bit(u_int gpio) +{ + struct pxagpio_softc *sc = pxagpio_softc; + int bit; + + bit = GPIO_BIT(gpio); + pxagpio_reg_write(sc, GPIO_REG(GPIO_GPCR0, gpio), bit); +} + +/* + * Quick function to change pin direction + */ +void +pxa2x0_gpio_set_dir(u_int gpio, int dir) +{ + struct pxagpio_softc *sc = pxagpio_softc; + int bit; + u_int32_t reg; + + bit = GPIO_BIT(gpio); + + reg = pxagpio_reg_read(sc, GPIO_REG(GPIO_GPDR0, gpio)) & ~bit; + if (GPIO_FN_IS_OUT(dir)) + reg |= bit; + pxagpio_reg_write(sc, GPIO_REG(GPIO_GPDR0, gpio), reg); +} + +/* + * Quick function to clear interrupt status on a pin + * GPIO pins may be toggle in an interrupt and we dont want + * extra spurious interrupts to occur. + * suppose this causes a slight race if a key is pressed while + * the interrupt handler is running. (yes this is for the keyboard driver) + */ +void +pxa2x0_gpio_clear_intr(u_int gpio) +{ + struct pxagpio_softc *sc = pxagpio_softc; + int bit; + + bit = GPIO_BIT(gpio); + pxagpio_reg_write(sc, GPIO_REG(GPIO_GEDR0, gpio), bit); +} |