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Annotation of funnyos/arch/sam7s64/dev/gpiobtn.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * $Id$
        !             3:  */
        !             4: #include <sys/types.h>
        !             5: #include <sys/device.h>
        !             6: #include <sys/gpio.h>
        !             7: #include <sys/devctl.h>
        !             8:
        !             9: #include <arch/sam7s64/dev/gpioledvar.h> /* for DCGPIOLED_TOGGLE */
        !            10:
        !            11: /*
        !            12:  * AT91SAM7S64 buttons.
        !            13:  * There are two buttons: below green led and below yellow led;
        !            14:  * first is on PA19 (13 pin) and generates FIQ,
        !            15:  * second is on PA20 (16 pin) and generates an IRQ to the core.
        !            16:  */
        !            17:
        !            18: int    gpiobtn_attach(struct device *, uint32_t, uint8_t);
        !            19: void   gpiobtn_interrupt(struct device *);
        !            20:
        !            21: struct gpiobtn_dd {
        !            22:        /* minor of 'gpioled' device which we will control */
        !            23:        uint8_t         gd_gpioledminor;
        !            24: };
        !            25:
        !            26: struct driver gpiobtn_dr = {
        !            27:        sizeof(struct gpiobtn_dd),
        !            28:        gpiobtn_attach,
        !            29:        NULL,
        !            30:        gpiobtn_interrupt
        !            31: };
        !            32:
        !            33:
        !            34: int
        !            35: gpiobtn_attach(struct device *self, uint32_t loc, uint8_t flags)
        !            36: {
        !            37:        struct gpiobtn_dd *ddp = self->dv_devdata;
        !            38:        struct gpio_controller *gcp = self->dv_parent->dv_aux;
        !            39:        struct gpio_pin pin;
        !            40:
        !            41:        pin.gp_pinno = loc;
        !            42:        pin.gp_pio = 1;         /* PIO mode */
        !            43:        pin.gp_flags = GPIO_PIN_INPUT;
        !            44:
        !            45:        /*
        !            46:         * we are provided with hint on which 'gpioled' device we will control.
        !            47:         * this hint is passed to us by devconfig as 'flags'.
        !            48:         */
        !            49:        ddp->gd_gpioledminor = flags;
        !            50:
        !            51:        printf("p64 onboard button (pio pin %d)\n", pin.gp_pinno);
        !            52:
        !            53:        /* talk to gpio controller */
        !            54:        gcp->gc_pinset(gcp->gc_selfdd, pin);
        !            55:
        !            56:        return(0);
        !            57: }
        !            58:
        !            59:
        !            60: void
        !            61: gpiobtn_interrupt(struct device *self)
        !            62: {
        !            63:        struct gpiobtn_dd *ddp = self->dv_devdata;
        !            64:        /*
        !            65:         * Use devctl to toggle gpioled.
        !            66:         */
        !            67:
        !            68:        devctl("gpioled", ddp->gd_gpioledminor, DCGPIOLED_TOGGLE, NULL);
        !            69: }
        !            70:
        !            71: