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      1 /*	$NetBSD: imx51_gpio.c,v 1.4 2019/07/24 12:33:18 hkenken Exp $ */
      2 
      3 /* derived from imx31_gpio.c */
      4 /*-
      5  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      6  * All rights reserved.
      7  *
      8  * This code is derived from software contributed to The NetBSD Foundation
      9  * by Matt Thomas
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: imx51_gpio.c,v 1.4 2019/07/24 12:33:18 hkenken Exp $");
     34 
     35 #include "opt_imx.h"
     36 
     37 #include "locators.h"
     38 #include "gpio.h"
     39 
     40 #define	_INTR_PRIVATE
     41 
     42 #include <sys/param.h>
     43 #include <sys/evcnt.h>
     44 #include <sys/atomic.h>
     45 
     46 #include <machine/intr.h>
     47 
     48 #include <arm/cpu.h>
     49 #include <arm/armreg.h>
     50 #include <arm/cpufunc.h>
     51 
     52 #include <sys/bus.h>
     53 
     54 #include <arm/imx/imx51reg.h>
     55 #include <arm/imx/imx51var.h>
     56 #include <arm/pic/picvar.h>
     57 
     58 #include <arm/imx/imxgpioreg.h>
     59 #include <arm/imx/imxgpiovar.h>
     60 
     61 #if NGPIO > 0
     62 #include <sys/gpio.h>
     63 #include <dev/gpio/gpiovar.h>
     64 #endif
     65 
     66 const int imxgpio_ngroups = GPIO_NGROUPS;
     67 
     68 int
     69 imxgpio_match(device_t parent, cfdata_t cfdata, void *aux)
     70 {
     71 	struct axi_attach_args *aa = aux;
     72 
     73 	switch(aa->aa_addr) {
     74 	case GPIO1_BASE:
     75 	case GPIO2_BASE:
     76 	case GPIO3_BASE:
     77 	case GPIO4_BASE:
     78 #ifdef IMX50
     79 	case GPIO5_BASE:
     80 	case GPIO6_BASE:
     81 #endif
     82 		return 1;
     83 	}
     84 
     85 	return 0;
     86 }
     87 
     88 void
     89 imxgpio_attach(device_t parent, device_t self, void *aux)
     90 {
     91 	struct imxgpio_softc * const gpio = device_private(self);
     92 	struct axi_attach_args * const aa = aux;
     93 	bus_space_handle_t ioh;
     94 	int error;
     95 
     96 	if (aa->aa_irq == AXICF_IRQ_DEFAULT &&
     97 	    aa->aa_irqbase != AXICF_IRQBASE_DEFAULT) {
     98 		aprint_error_dev(self, "missing intr in config\n");
     99 		return;
    100 	}
    101 	if (aa->aa_irq != AXICF_IRQ_DEFAULT &&
    102 	    aa->aa_irqbase == AXICF_IRQBASE_DEFAULT) {
    103 		aprint_error_dev(self, "missing irqbase in config\n");
    104 		return;
    105 	}
    106 
    107 	if (aa->aa_size == AXICF_SIZE_DEFAULT)
    108 		aa->aa_size = GPIO_SIZE;
    109 
    110 	error = bus_space_map(aa->aa_iot, aa->aa_addr, aa->aa_size,
    111 	    0, &ioh);
    112 	if (error) {
    113 		aprint_error(": failed to map register %#lx@%#lx: %d\n",
    114 		    aa->aa_size, aa->aa_addr, error);
    115 		return;
    116 	}
    117 
    118 	gpio->gpio_is = intr_establish(aa->aa_irq,
    119 	    IPL_HIGH, IST_LEVEL, pic_handle_intr, &gpio->gpio_pic);
    120 	KASSERT(gpio->gpio_is != NULL );
    121 	gpio->gpio_is_high = intr_establish(aa->aa_irq + 1,
    122 	    IPL_HIGH, IST_LEVEL, pic_handle_intr, &gpio->gpio_pic);
    123 	KASSERT(gpio->gpio_is_high != NULL);
    124 
    125 	gpio->gpio_memt = aa->aa_iot;
    126 	gpio->gpio_memh = ioh;
    127 	gpio->gpio_unit = (aa->aa_addr - GPIO1_BASE) / 0x4000;
    128 	gpio->gpio_irqbase = aa->aa_irqbase;
    129 
    130 	imxgpio_attach_common(self);
    131 }
    132 
    133