gpio_opb.c revision 1.1.10.2
1 1.1.10.2 kent /* $NetBSD: gpio_opb.c,v 1.1.10.2 2005/04/29 11:28:20 kent Exp $ */ 2 1.1.10.2 kent 3 1.1.10.2 kent /* 4 1.1.10.2 kent * Copyright (c) 2004 Shigeyuki Fukushima. 5 1.1.10.2 kent * All rights reserved. 6 1.1.10.2 kent * 7 1.1.10.2 kent * Redistribution and use in source and binary forms, with or without 8 1.1.10.2 kent * modification, are permitted provided that the following conditions 9 1.1.10.2 kent * are met: 10 1.1.10.2 kent * 1. Redistributions of source code must retain the above copyright 11 1.1.10.2 kent * notice, this list of conditions and the following disclaimer. 12 1.1.10.2 kent * 2. Redistributions in binary form must reproduce the above 13 1.1.10.2 kent * copyright notice, this list of conditions and the following 14 1.1.10.2 kent * disclaimer in the documentation and/or other materials provided 15 1.1.10.2 kent * with the distribution. 16 1.1.10.2 kent * 3. The name of the author may not be used to endorse or promote 17 1.1.10.2 kent * products derived from this software without specific prior 18 1.1.10.2 kent * written permission. 19 1.1.10.2 kent * 20 1.1.10.2 kent * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 21 1.1.10.2 kent * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22 1.1.10.2 kent * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 1.1.10.2 kent * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 24 1.1.10.2 kent * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 1.1.10.2 kent * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 26 1.1.10.2 kent * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 1.1.10.2 kent * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 28 1.1.10.2 kent * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 1.1.10.2 kent * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 1.1.10.2 kent * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 1.1.10.2 kent */ 32 1.1.10.2 kent 33 1.1.10.2 kent #include "locators.h" 34 1.1.10.2 kent 35 1.1.10.2 kent #include <sys/param.h> 36 1.1.10.2 kent #include <sys/device.h> 37 1.1.10.2 kent #include <sys/systm.h> 38 1.1.10.2 kent 39 1.1.10.2 kent #include <machine/pio.h> 40 1.1.10.2 kent 41 1.1.10.2 kent #include <powerpc/ibm4xx/dcr405gp.h> 42 1.1.10.2 kent #include <powerpc/ibm4xx/dev/opbvar.h> 43 1.1.10.2 kent #include <powerpc/ibm4xx/dev/gpioreg.h> 44 1.1.10.2 kent #include <powerpc/ibm4xx/dev/gpiovar.h> 45 1.1.10.2 kent 46 1.1.10.2 kent struct gpio_softc { 47 1.1.10.2 kent struct device sc_dev; /* device generic */ 48 1.1.10.2 kent struct gpio_controller sc_gpio; /* GPIO controller */ 49 1.1.10.2 kent u_long sc_addr; /* GPIO controller address */ 50 1.1.10.2 kent }; 51 1.1.10.2 kent 52 1.1.10.2 kent static int gpio_print(void *, const char *); 53 1.1.10.2 kent static int gpio_search(struct device *, struct cfdata *, 54 1.1.10.2 kent const locdesc_t *ldesc, void *aux); 55 1.1.10.2 kent static int gpio_match(struct device *, struct cfdata *, void *); 56 1.1.10.2 kent static void gpio_attach(struct device *, struct device *, void *); 57 1.1.10.2 kent 58 1.1.10.2 kent static int gpio_or_read(void *, int); 59 1.1.10.2 kent static int gpio_tcr_read(void *, int); 60 1.1.10.2 kent static int gpio_odr_read(void *, int); 61 1.1.10.2 kent static int gpio_ir_read(void *, int); 62 1.1.10.2 kent static void gpio_or_write(void *arg, int addr, int bit); 63 1.1.10.2 kent static void gpio_tcr_write(void *arg, int addr, int bit); 64 1.1.10.2 kent static void gpio_odr_write(void *arg, int addr, int bit); 65 1.1.10.2 kent 66 1.1.10.2 kent static int gpio_read_bit(void *, int, int); 67 1.1.10.2 kent static void gpio_write_bit(void *, int, int, int); 68 1.1.10.2 kent static uint32_t gpio_read(void *, int); 69 1.1.10.2 kent static void gpio_write(void *, int, uint32_t); 70 1.1.10.2 kent 71 1.1.10.2 kent CFATTACH_DECL(gpio, sizeof(struct gpio_softc), 72 1.1.10.2 kent gpio_match, gpio_attach, NULL, NULL); 73 1.1.10.2 kent 74 1.1.10.2 kent static int 75 1.1.10.2 kent gpio_print(void *aux, const char *pnp) 76 1.1.10.2 kent { 77 1.1.10.2 kent struct gpio_attach_args *gaa = aux; 78 1.1.10.2 kent 79 1.1.10.2 kent aprint_normal(" addr GPIO#%d", gaa->ga_addr); 80 1.1.10.2 kent 81 1.1.10.2 kent return (UNCONF); 82 1.1.10.2 kent } 83 1.1.10.2 kent 84 1.1.10.2 kent static int 85 1.1.10.2 kent gpio_search(struct device *parent, struct cfdata *cf, 86 1.1.10.2 kent const locdesc_t *ldesc, void *aux) 87 1.1.10.2 kent { 88 1.1.10.2 kent struct gpio_softc *sc = (void *)parent; 89 1.1.10.2 kent struct gpio_attach_args gaa; 90 1.1.10.2 kent 91 1.1.10.2 kent gaa.ga_tag = &sc->sc_gpio; 92 1.1.10.2 kent gaa.ga_addr = cf->cf_loc[GPIOCF_ADDR]; 93 1.1.10.2 kent 94 1.1.10.2 kent if (config_match(parent, cf, &gaa) > 0) 95 1.1.10.2 kent config_attach(parent, cf, &gaa, gpio_print); 96 1.1.10.2 kent 97 1.1.10.2 kent return (0); 98 1.1.10.2 kent } 99 1.1.10.2 kent 100 1.1.10.2 kent static int 101 1.1.10.2 kent gpio_match(struct device *parent, struct cfdata *cf, void *args) 102 1.1.10.2 kent { 103 1.1.10.2 kent struct opb_attach_args *oaa = args; 104 1.1.10.2 kent 105 1.1.10.2 kent if (strcmp(oaa->opb_name, cf->cf_name) != 0) 106 1.1.10.2 kent return (0); 107 1.1.10.2 kent 108 1.1.10.2 kent return (1); 109 1.1.10.2 kent } 110 1.1.10.2 kent 111 1.1.10.2 kent static void 112 1.1.10.2 kent gpio_attach(struct device *parent, struct device *self, void *aux) 113 1.1.10.2 kent { 114 1.1.10.2 kent struct gpio_softc *sc = (struct gpio_softc *)self; 115 1.1.10.2 kent struct opb_attach_args *oaa = aux; 116 1.1.10.2 kent 117 1.1.10.2 kent aprint_naive(": GPIO controller\n"); 118 1.1.10.2 kent aprint_normal(": On-Chip GPIO controller\n"); 119 1.1.10.2 kent 120 1.1.10.2 kent sc->sc_addr = oaa->opb_addr; 121 1.1.10.2 kent sc->sc_gpio.cookie = sc; 122 1.1.10.2 kent sc->sc_gpio.io_or_read = gpio_or_read; 123 1.1.10.2 kent sc->sc_gpio.io_tcr_read = gpio_tcr_read; 124 1.1.10.2 kent sc->sc_gpio.io_odr_read = gpio_odr_read; 125 1.1.10.2 kent sc->sc_gpio.io_ir_read = gpio_ir_read; 126 1.1.10.2 kent sc->sc_gpio.io_or_write = gpio_or_write; 127 1.1.10.2 kent sc->sc_gpio.io_tcr_write = gpio_tcr_write; 128 1.1.10.2 kent sc->sc_gpio.io_odr_write = gpio_odr_write; 129 1.1.10.2 kent 130 1.1.10.2 kent (void) config_search_ia(gpio_search, self, "gpio", NULL); 131 1.1.10.2 kent } 132 1.1.10.2 kent 133 1.1.10.2 kent static int 134 1.1.10.2 kent gpio_or_read(void *arg, int addr) 135 1.1.10.2 kent { 136 1.1.10.2 kent return (gpio_read_bit(arg, GPIO_OR, addr)); 137 1.1.10.2 kent } 138 1.1.10.2 kent 139 1.1.10.2 kent static int 140 1.1.10.2 kent gpio_tcr_read(void *arg, int addr) 141 1.1.10.2 kent { 142 1.1.10.2 kent return (gpio_read_bit(arg, GPIO_TCR, addr)); 143 1.1.10.2 kent } 144 1.1.10.2 kent 145 1.1.10.2 kent static int 146 1.1.10.2 kent gpio_odr_read(void *arg, int addr) 147 1.1.10.2 kent { 148 1.1.10.2 kent return (gpio_read_bit(arg, GPIO_ODR, addr)); 149 1.1.10.2 kent } 150 1.1.10.2 kent 151 1.1.10.2 kent static int 152 1.1.10.2 kent gpio_ir_read(void *arg, int addr) 153 1.1.10.2 kent { 154 1.1.10.2 kent gpio_write_bit(arg, GPIO_ODR, addr, 0); 155 1.1.10.2 kent gpio_write_bit(arg, GPIO_TCR, addr, 0); 156 1.1.10.2 kent return (gpio_read_bit(arg, GPIO_ODR, addr)); 157 1.1.10.2 kent } 158 1.1.10.2 kent 159 1.1.10.2 kent static void 160 1.1.10.2 kent gpio_or_write(void *arg, int addr, int bit) 161 1.1.10.2 kent { 162 1.1.10.2 kent gpio_write_bit(arg, GPIO_ODR, addr, 0); 163 1.1.10.2 kent gpio_write_bit(arg, GPIO_TCR, addr, 1); 164 1.1.10.2 kent gpio_write_bit(arg, GPIO_OR, addr, bit); 165 1.1.10.2 kent } 166 1.1.10.2 kent 167 1.1.10.2 kent static void 168 1.1.10.2 kent gpio_tcr_write(void *arg, int addr, int bit) 169 1.1.10.2 kent { 170 1.1.10.2 kent gpio_write_bit(arg, GPIO_TCR, addr, bit); 171 1.1.10.2 kent } 172 1.1.10.2 kent 173 1.1.10.2 kent static void 174 1.1.10.2 kent gpio_odr_write(void *arg, int addr, int bit) 175 1.1.10.2 kent { 176 1.1.10.2 kent gpio_write_bit(arg, GPIO_ODR, addr, bit); 177 1.1.10.2 kent } 178 1.1.10.2 kent 179 1.1.10.2 kent static int 180 1.1.10.2 kent gpio_read_bit(void *arg, int offset, int addr) 181 1.1.10.2 kent { 182 1.1.10.2 kent uint32_t rv = gpio_read(arg, offset); 183 1.1.10.2 kent uint32_t mask = GPIO_SBIT(addr); 184 1.1.10.2 kent 185 1.1.10.2 kent return ((rv & mask) >> GPIO_SHIFT(addr)); 186 1.1.10.2 kent } 187 1.1.10.2 kent 188 1.1.10.2 kent void 189 1.1.10.2 kent gpio_write_bit(void *arg, int offset, int addr, int bit) 190 1.1.10.2 kent { 191 1.1.10.2 kent uint32_t rv = gpio_read(arg, offset); 192 1.1.10.2 kent uint32_t mask = GPIO_SBIT(addr); 193 1.1.10.2 kent 194 1.1.10.2 kent rv = rv & ~mask; 195 1.1.10.2 kent rv = rv | ((bit << GPIO_SHIFT(addr)) & mask); 196 1.1.10.2 kent gpio_write(arg, offset, rv); 197 1.1.10.2 kent } 198 1.1.10.2 kent 199 1.1.10.2 kent static uint32_t 200 1.1.10.2 kent gpio_read(void *arg, int offset) 201 1.1.10.2 kent { 202 1.1.10.2 kent struct gpio_softc *sc = arg; 203 1.1.10.2 kent uint32_t rv; 204 1.1.10.2 kent 205 1.1.10.2 kent rv = inl(sc->sc_addr + offset); 206 1.1.10.2 kent 207 1.1.10.2 kent return rv; 208 1.1.10.2 kent } 209 1.1.10.2 kent 210 1.1.10.2 kent static void 211 1.1.10.2 kent gpio_write(void *arg, int offset, uint32_t out) 212 1.1.10.2 kent { 213 1.1.10.2 kent struct gpio_softc *sc = arg; 214 1.1.10.2 kent 215 1.1.10.2 kent outl((sc->sc_addr + offset), out); 216 1.1.10.2 kent } 217
Indexes created Tue Sep 30 11:09:46 GMT 2025