gpio_ebus.c revision 1.1.2.2
1 1.1.2.2 bouyer /* $NetBSD: gpio_ebus.c,v 1.1.2.2 2011/02/08 18:05:06 bouyer Exp $ */ 2 1.1.2.2 bouyer 3 1.1.2.2 bouyer /*- 4 1.1.2.2 bouyer * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 1.1.2.2 bouyer * All rights reserved. 6 1.1.2.2 bouyer * 7 1.1.2.2 bouyer * This code was written by Alessandro Forin and Neil Pittman 8 1.1.2.2 bouyer * at Microsoft Research and contributed to The NetBSD Foundation 9 1.1.2.2 bouyer * by Microsoft Corporation. 10 1.1.2.2 bouyer * 11 1.1.2.2 bouyer * Redistribution and use in source and binary forms, with or without 12 1.1.2.2 bouyer * modification, are permitted provided that the following conditions 13 1.1.2.2 bouyer * are met: 14 1.1.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 15 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer. 16 1.1.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 17 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 18 1.1.2.2 bouyer * documentation and/or other materials provided with the distribution. 19 1.1.2.2 bouyer * 20 1.1.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 1.1.2.2 bouyer * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 1.1.2.2 bouyer * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 1.1.2.2 bouyer * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 1.1.2.2 bouyer * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 1.1.2.2 bouyer * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 1.1.2.2 bouyer * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 1.1.2.2 bouyer * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 1.1.2.2 bouyer * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 1.1.2.2 bouyer * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 1.1.2.2 bouyer * POSSIBILITY OF SUCH DAMAGE. 31 1.1.2.2 bouyer */ 32 1.1.2.2 bouyer 33 1.1.2.2 bouyer #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 34 1.1.2.2 bouyer __KERNEL_RCSID(0, "$NetBSD: gpio_ebus.c,v 1.1.2.2 2011/02/08 18:05:06 bouyer Exp $"); 35 1.1.2.2 bouyer 36 1.1.2.2 bouyer #include <sys/param.h> 37 1.1.2.2 bouyer #include <sys/device.h> 38 1.1.2.2 bouyer #include <sys/systm.h> 39 1.1.2.2 bouyer #include <sys/gpio.h> 40 1.1.2.2 bouyer #include <dev/gpio/gpiovar.h> 41 1.1.2.2 bouyer 42 1.1.2.2 bouyer #include <emips/ebus/ebusvar.h> 43 1.1.2.2 bouyer #include <emips/emips/machdep.h> 44 1.1.2.2 bouyer #include <machine/emipsreg.h> 45 1.1.2.2 bouyer 46 1.1.2.2 bouyer /* 47 1.1.2.2 bouyer * Device softc 48 1.1.2.2 bouyer */ 49 1.1.2.2 bouyer #define GPIO_NPINS 32 50 1.1.2.2 bouyer 51 1.1.2.2 bouyer struct epio_softc { 52 1.1.2.2 bouyer struct device sc_dev; 53 1.1.2.2 bouyer struct _Pio *sc_dp; 54 1.1.2.2 bouyer struct gpio_chipset_tag sc_gpio_gc; 55 1.1.2.2 bouyer gpio_pin_t sc_gpio_pins[GPIO_NPINS]; 56 1.1.2.2 bouyer }; 57 1.1.2.2 bouyer 58 1.1.2.2 bouyer static int epio_ebus_match (struct device *, struct cfdata *, void *); 59 1.1.2.2 bouyer static void epio_ebus_attach (struct device *, struct device *, void *); 60 1.1.2.2 bouyer 61 1.1.2.2 bouyer CFATTACH_DECL(epio, sizeof (struct epio_softc), 62 1.1.2.2 bouyer epio_ebus_match, epio_ebus_attach, NULL, NULL); 63 1.1.2.2 bouyer 64 1.1.2.2 bouyer static int epio_pin_read(void *, int); 65 1.1.2.2 bouyer static void epio_pin_write(void *, int, int); 66 1.1.2.2 bouyer static void epio_pin_ctl(void *, int, int); 67 1.1.2.2 bouyer 68 1.1.2.2 bouyer static int 69 1.1.2.2 bouyer epio_ebus_match(struct device *parent, struct cfdata *match, void *aux) 70 1.1.2.2 bouyer { 71 1.1.2.2 bouyer struct ebus_attach_args *ia = aux; 72 1.1.2.2 bouyer struct _Pio *f = (struct _Pio *)ia->ia_vaddr; 73 1.1.2.2 bouyer 74 1.1.2.2 bouyer if (strcmp("gpio", ia->ia_name) != 0) 75 1.1.2.2 bouyer return (0); 76 1.1.2.2 bouyer if ((f == NULL) || 77 1.1.2.2 bouyer (f->Tag != PMTTAG_GPIO)) 78 1.1.2.2 bouyer return (0); 79 1.1.2.2 bouyer 80 1.1.2.2 bouyer return (1); 81 1.1.2.2 bouyer } 82 1.1.2.2 bouyer 83 1.1.2.2 bouyer static void 84 1.1.2.2 bouyer epio_ebus_attach(struct device *parent, struct device *self, void *aux) 85 1.1.2.2 bouyer { 86 1.1.2.2 bouyer struct ebus_attach_args *ia =aux; 87 1.1.2.2 bouyer struct epio_softc *sc = (struct epio_softc *)self; 88 1.1.2.2 bouyer struct gpiobus_attach_args gba; 89 1.1.2.2 bouyer int i; 90 1.1.2.2 bouyer uint32_t data; 91 1.1.2.2 bouyer 92 1.1.2.2 bouyer sc->sc_dp = (struct _Pio*)ia->ia_vaddr; 93 1.1.2.2 bouyer data = sc->sc_dp->PinData; 94 1.1.2.2 bouyer 95 1.1.2.2 bouyer #if DEBUG 96 1.1.2.2 bouyer printf(" virt=%p data=%zx", (void*)sc->sc_dp, data); 97 1.1.2.2 bouyer #endif 98 1.1.2.2 bouyer printf(": GPIO controller\n"); 99 1.1.2.2 bouyer 100 1.1.2.2 bouyer /* BUGBUG Initialize pins properly */ 101 1.1.2.2 bouyer for (i = 0 ; i < GPIO_NPINS ; i++) { 102 1.1.2.2 bouyer sc->sc_gpio_pins[i].pin_num = i; 103 1.1.2.2 bouyer sc->sc_gpio_pins[i].pin_caps = GPIO_PIN_INOUT 104 1.1.2.2 bouyer | GPIO_PIN_OPENDRAIN 105 1.1.2.2 bouyer | GPIO_PIN_TRISTATE; 106 1.1.2.2 bouyer 107 1.1.2.2 bouyer /* current defaults */ 108 1.1.2.2 bouyer sc->sc_gpio_pins[i].pin_flags = GPIO_PIN_INOUT; 109 1.1.2.2 bouyer sc->sc_gpio_pins[i].pin_state = (data & (1 << i)) ? GPIO_PIN_HIGH : GPIO_PIN_LOW; 110 1.1.2.2 bouyer sc->sc_gpio_pins[i].pin_mapped = 0; 111 1.1.2.2 bouyer } 112 1.1.2.2 bouyer 113 1.1.2.2 bouyer /* Create controller tag */ 114 1.1.2.2 bouyer sc->sc_gpio_gc.gp_cookie = sc; 115 1.1.2.2 bouyer sc->sc_gpio_gc.gp_pin_read = epio_pin_read; 116 1.1.2.2 bouyer sc->sc_gpio_gc.gp_pin_write = epio_pin_write; 117 1.1.2.2 bouyer sc->sc_gpio_gc.gp_pin_ctl = epio_pin_ctl; 118 1.1.2.2 bouyer 119 1.1.2.2 bouyer gba.gba_gc = &sc->sc_gpio_gc; 120 1.1.2.2 bouyer gba.gba_pins = sc->sc_gpio_pins; 121 1.1.2.2 bouyer gba.gba_npins = GPIO_NPINS; 122 1.1.2.2 bouyer 123 1.1.2.2 bouyer /* Attach GPIO framework */ 124 1.1.2.2 bouyer (void) config_found(&sc->sc_dev, &gba, gpiobus_print); 125 1.1.2.2 bouyer } 126 1.1.2.2 bouyer 127 1.1.2.2 bouyer static int 128 1.1.2.2 bouyer epio_pin_read(void *arg, int pin) 129 1.1.2.2 bouyer { 130 1.1.2.2 bouyer struct epio_softc *sc = arg; 131 1.1.2.2 bouyer uint32_t data = sc->sc_dp->PinData; 132 1.1.2.2 bouyer int p; 133 1.1.2.2 bouyer 134 1.1.2.2 bouyer p = pin % GPIO_NPINS; 135 1.1.2.2 bouyer return (data >> p) & 0x01; 136 1.1.2.2 bouyer } 137 1.1.2.2 bouyer 138 1.1.2.2 bouyer static void 139 1.1.2.2 bouyer epio_pin_write(void *arg, int pin, int value) 140 1.1.2.2 bouyer { 141 1.1.2.2 bouyer struct epio_softc *sc = arg; 142 1.1.2.2 bouyer uint32_t data; 143 1.1.2.2 bouyer int p; 144 1.1.2.2 bouyer 145 1.1.2.2 bouyer p = pin % GPIO_NPINS; 146 1.1.2.2 bouyer data = 1 << p; 147 1.1.2.2 bouyer if (value) 148 1.1.2.2 bouyer sc->sc_dp->PinData = data; 149 1.1.2.2 bouyer else 150 1.1.2.2 bouyer sc->sc_dp->ClearData = data; 151 1.1.2.2 bouyer } 152 1.1.2.2 bouyer 153 1.1.2.2 bouyer static void 154 1.1.2.2 bouyer epio_pin_ctl(void *arg, int pin, int flags) 155 1.1.2.2 bouyer { 156 1.1.2.2 bouyer struct epio_softc *sc = arg; 157 1.1.2.2 bouyer uint32_t data; 158 1.1.2.2 bouyer int p; 159 1.1.2.2 bouyer 160 1.1.2.2 bouyer p = pin % GPIO_NPINS; 161 1.1.2.2 bouyer data = (1 << p); 162 1.1.2.2 bouyer 163 1.1.2.2 bouyer if (flags & GPIO_PIN_INOUT) { 164 1.1.2.2 bouyer sc->sc_dp->Direction = data; 165 1.1.2.2 bouyer } 166 1.1.2.2 bouyer 167 1.1.2.2 bouyer if (flags & GPIO_PIN_TRISTATE) { 168 1.1.2.2 bouyer sc->sc_dp->OutDisable = data; 169 1.1.2.2 bouyer } 170 1.1.2.2 bouyer 171 1.1.2.2 bouyer if (flags & GPIO_PIN_OPENDRAIN) { 172 1.1.2.2 bouyer sc->sc_dp->Enable = data; 173 1.1.2.2 bouyer } 174 1.1.2.2 bouyer } 175
Indexes created Thu Oct 02 01:09:59 GMT 2025