pl061.c revision 1.1.2.3
1 1.1.2.3 pgoyette /* $NetBSD: pl061.c,v 1.1.2.3 2018/11/26 01:52:31 pgoyette Exp $ */ 2 1.1.2.2 pgoyette 3 1.1.2.2 pgoyette /* 4 1.1.2.2 pgoyette * Copyright (c) 2018 Jonathan A. Kollasch 5 1.1.2.2 pgoyette * All rights reserved. 6 1.1.2.2 pgoyette * 7 1.1.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 pgoyette * modification, are permitted provided that the following conditions 9 1.1.2.2 pgoyette * are met: 10 1.1.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 pgoyette * documentation and/or other materials provided with the distribution. 15 1.1.2.2 pgoyette * 16 1.1.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 1.1.2.2 pgoyette * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.1.2.2 pgoyette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.1.2.2 pgoyette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 20 1.1.2.2 pgoyette * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 1.1.2.2 pgoyette * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 1.1.2.2 pgoyette * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 23 1.1.2.2 pgoyette * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 1.1.2.2 pgoyette * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 25 1.1.2.2 pgoyette * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 26 1.1.2.2 pgoyette * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 1.1.2.2 pgoyette */ 28 1.1.2.2 pgoyette 29 1.1.2.2 pgoyette #include <sys/cdefs.h> 30 1.1.2.3 pgoyette __KERNEL_RCSID(0, "$NetBSD: pl061.c,v 1.1.2.3 2018/11/26 01:52:31 pgoyette Exp $"); 31 1.1.2.2 pgoyette 32 1.1.2.2 pgoyette #include <sys/param.h> 33 1.1.2.2 pgoyette #include <sys/bus.h> 34 1.1.2.2 pgoyette #include <sys/device.h> 35 1.1.2.2 pgoyette #include <sys/intr.h> 36 1.1.2.2 pgoyette #include <sys/systm.h> 37 1.1.2.2 pgoyette #include <sys/kernel.h> 38 1.1.2.2 pgoyette #include <sys/kmem.h> 39 1.1.2.2 pgoyette #include <sys/gpio.h> 40 1.1.2.2 pgoyette 41 1.1.2.2 pgoyette #include <dev/gpio/gpiovar.h> 42 1.1.2.2 pgoyette #include "gpio.h" 43 1.1.2.2 pgoyette 44 1.1.2.2 pgoyette #include <dev/ic/pl061reg.h> 45 1.1.2.2 pgoyette #include <dev/ic/pl061var.h> 46 1.1.2.2 pgoyette 47 1.1.2.2 pgoyette void 48 1.1.2.2 pgoyette plgpio_attach(struct plgpio_softc *sc) 49 1.1.2.2 pgoyette { 50 1.1.2.2 pgoyette struct gpiobus_attach_args gba; 51 1.1.2.2 pgoyette u_int pin; 52 1.1.2.2 pgoyette 53 1.1.2.2 pgoyette sc->sc_gc.gp_cookie = sc; 54 1.1.2.2 pgoyette sc->sc_gc.gp_pin_read = plgpio_pin_read; 55 1.1.2.2 pgoyette sc->sc_gc.gp_pin_write = plgpio_pin_write; 56 1.1.2.2 pgoyette sc->sc_gc.gp_pin_ctl = plgpio_pin_ctl; 57 1.1.2.2 pgoyette 58 1.1.2.3 pgoyette const uint32_t cnf = PLGPIO_READ(sc, PL061_GPIOAFSEL_REG) | 59 1.1.2.3 pgoyette sc->sc_reserved_mask; 60 1.1.2.2 pgoyette 61 1.1.2.2 pgoyette for (pin = 0; pin < 8; pin++) { 62 1.1.2.2 pgoyette sc->sc_pins[pin].pin_num = pin; 63 1.1.2.2 pgoyette /* skip pins in hardware control mode */ 64 1.1.2.2 pgoyette if ((cnf & __BIT(pin)) != 0) 65 1.1.2.2 pgoyette continue; 66 1.1.2.2 pgoyette sc->sc_pins[pin].pin_caps = 67 1.1.2.2 pgoyette GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | 68 1.1.2.2 pgoyette GPIO_PIN_TRISTATE; 69 1.1.2.2 pgoyette sc->sc_pins[pin].pin_state = 70 1.1.2.2 pgoyette plgpio_pin_read(sc, pin); 71 1.1.2.2 pgoyette } 72 1.1.2.2 pgoyette 73 1.1.2.2 pgoyette memset(&gba, 0, sizeof(gba)); 74 1.1.2.2 pgoyette gba.gba_gc = &sc->sc_gc; 75 1.1.2.2 pgoyette gba.gba_pins = sc->sc_pins; 76 1.1.2.2 pgoyette gba.gba_npins = 8; 77 1.1.2.2 pgoyette 78 1.1.2.2 pgoyette #if NGPIO > 0 79 1.1.2.2 pgoyette (void)config_found_ia(sc->sc_dev, "gpiobus", &gba, 80 1.1.2.2 pgoyette gpiobus_print); 81 1.1.2.2 pgoyette #endif 82 1.1.2.2 pgoyette } 83 1.1.2.2 pgoyette 84 1.1.2.2 pgoyette int 85 1.1.2.2 pgoyette plgpio_pin_read(void *priv, int pin) 86 1.1.2.2 pgoyette { 87 1.1.2.2 pgoyette struct plgpio_softc * const sc = priv; 88 1.1.2.2 pgoyette 89 1.1.2.2 pgoyette const uint32_t v = PLGPIO_READ(sc, PL061_GPIODATA_REG(1<<pin)); 90 1.1.2.2 pgoyette 91 1.1.2.2 pgoyette return (v >> pin) & 1; 92 1.1.2.2 pgoyette } 93 1.1.2.2 pgoyette 94 1.1.2.2 pgoyette void 95 1.1.2.2 pgoyette plgpio_pin_write(void *priv, int pin, int val) 96 1.1.2.2 pgoyette { 97 1.1.2.2 pgoyette struct plgpio_softc * const sc = priv; 98 1.1.2.2 pgoyette 99 1.1.2.2 pgoyette PLGPIO_WRITE(sc, PL061_GPIODATA_REG(1 << pin), val << pin); 100 1.1.2.2 pgoyette } 101 1.1.2.2 pgoyette 102 1.1.2.2 pgoyette void 103 1.1.2.2 pgoyette plgpio_pin_ctl(void *priv, int pin, int flags) 104 1.1.2.2 pgoyette { 105 1.1.2.2 pgoyette struct plgpio_softc * const sc = priv; 106 1.1.2.2 pgoyette uint32_t v; 107 1.1.2.2 pgoyette 108 1.1.2.2 pgoyette if (flags & GPIO_PIN_INPUT) { 109 1.1.2.2 pgoyette v = PLGPIO_READ(sc, PL061_GPIODIR_REG); 110 1.1.2.2 pgoyette v &= ~(1 << pin); 111 1.1.2.2 pgoyette PLGPIO_WRITE(sc, PL061_GPIODIR_REG, v); 112 1.1.2.2 pgoyette } else if (flags & GPIO_PIN_OUTPUT) { 113 1.1.2.2 pgoyette v = PLGPIO_READ(sc, PL061_GPIODIR_REG); 114 1.1.2.2 pgoyette v |= (1 << pin); 115 1.1.2.2 pgoyette PLGPIO_WRITE(sc, PL061_GPIODIR_REG, v); 116 1.1.2.2 pgoyette } 117 1.1.2.2 pgoyette } 118
Indexes created Thu Oct 23 22:10:10 GMT 2025