augpio.c revision 1.2.2.2
1 1.2.2.2 yamt /* $NetBSD: augpio.c,v 1.2.2.2 2006/02/18 15:38:41 yamt Exp $ */ 2 1.2.2.2 yamt 3 1.2.2.2 yamt /*- 4 1.2.2.2 yamt * Copyright (c) 2006 Itronix Inc. 5 1.2.2.2 yamt * All rights reserved. 6 1.2.2.2 yamt * 7 1.2.2.2 yamt * Written by Garrett D'Amore for Itronix Inc. 8 1.2.2.2 yamt * 9 1.2.2.2 yamt * Redistribution and use in source and binary forms, with or without 10 1.2.2.2 yamt * modification, are permitted provided that the following conditions 11 1.2.2.2 yamt * are met: 12 1.2.2.2 yamt * 1. Redistributions of source code must retain the above copyright 13 1.2.2.2 yamt * notice, this list of conditions and the following disclaimer. 14 1.2.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 15 1.2.2.2 yamt * notice, this list of conditions and the following disclaimer in the 16 1.2.2.2 yamt * documentation and/or other materials provided with the distribution. 17 1.2.2.2 yamt * 3. The name of Itronix Inc. may not be used to endorse 18 1.2.2.2 yamt * or promote products derived from this software without specific 19 1.2.2.2 yamt * prior written permission. 20 1.2.2.2 yamt * 21 1.2.2.2 yamt * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 22 1.2.2.2 yamt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 1.2.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 1.2.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 25 1.2.2.2 yamt * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 26 1.2.2.2 yamt * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 1.2.2.2 yamt * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 28 1.2.2.2 yamt * ON ANY THEORY OF LIABILITY, WHETHER IN 29 1.2.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 1.2.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 1.2.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 32 1.2.2.2 yamt */ 33 1.2.2.2 yamt 34 1.2.2.2 yamt #include <sys/cdefs.h> 35 1.2.2.2 yamt __KERNEL_RCSID(0, "$NetBSD: augpio.c,v 1.2.2.2 2006/02/18 15:38:41 yamt Exp $"); 36 1.2.2.2 yamt 37 1.2.2.2 yamt #include <sys/types.h> 38 1.2.2.2 yamt #include <sys/param.h> 39 1.2.2.2 yamt #include <sys/systm.h> 40 1.2.2.2 yamt #include <sys/errno.h> 41 1.2.2.2 yamt #include <sys/device.h> 42 1.2.2.2 yamt #include <sys/gpio.h> 43 1.2.2.2 yamt #include <sys/kernel.h> 44 1.2.2.2 yamt 45 1.2.2.2 yamt #include <dev/gpio/gpiovar.h> 46 1.2.2.2 yamt 47 1.2.2.2 yamt #include <machine/bus.h> 48 1.2.2.2 yamt #include <machine/cpu.h> 49 1.2.2.2 yamt 50 1.2.2.2 yamt #include <mips/alchemy/include/aubusvar.h> 51 1.2.2.2 yamt #include <mips/alchemy/include/aureg.h> 52 1.2.2.2 yamt #include <mips/alchemy/dev/augpioreg.h> 53 1.2.2.2 yamt #include <mips/alchemy/dev/augpiovar.h> 54 1.2.2.2 yamt 55 1.2.2.2 yamt struct augpio_softc { 56 1.2.2.2 yamt struct device sc_dev; 57 1.2.2.2 yamt struct gpio_chipset_tag sc_gc; 58 1.2.2.2 yamt gpio_pin_t sc_pins[AUGPIO_NPINS]; 59 1.2.2.2 yamt int sc_npins; 60 1.2.2.2 yamt int sc_isgpio2; 61 1.2.2.2 yamt }; 62 1.2.2.2 yamt 63 1.2.2.2 yamt static int augpio_pin_read(void *, int); 64 1.2.2.2 yamt static void augpio_pin_write(void *, int, int); 65 1.2.2.2 yamt static void augpio_pin_ctl(void *, int, int); 66 1.2.2.2 yamt static int augpio_match(struct device *, struct cfdata *, void *); 67 1.2.2.2 yamt static void augpio_attach(struct device *, struct device *, void *); 68 1.2.2.2 yamt 69 1.2.2.2 yamt CFATTACH_DECL(augpio, sizeof(struct augpio_softc), 70 1.2.2.2 yamt augpio_match, augpio_attach, NULL, NULL); 71 1.2.2.2 yamt 72 1.2.2.2 yamt #define GETREG(x) \ 73 1.2.2.2 yamt (*(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(x)) 74 1.2.2.2 yamt #define PUTREG(x, v) \ 75 1.2.2.2 yamt ((*(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(x)) = (v)) 76 1.2.2.2 yamt 77 1.2.2.2 yamt static int augpio_found = 0; 78 1.2.2.2 yamt 79 1.2.2.2 yamt int 80 1.2.2.2 yamt augpio_match(struct device *parent, struct cfdata *match, void *aux) 81 1.2.2.2 yamt { 82 1.2.2.2 yamt struct aubus_attach_args *aa = (struct aubus_attach_args *)aux; 83 1.2.2.2 yamt 84 1.2.2.2 yamt if (strcmp(aa->aa_name, "augpio") != 0) 85 1.2.2.2 yamt return 0; 86 1.2.2.2 yamt 87 1.2.2.2 yamt if (augpio_found) 88 1.2.2.2 yamt return 0; 89 1.2.2.2 yamt 90 1.2.2.2 yamt return 1; 91 1.2.2.2 yamt } 92 1.2.2.2 yamt 93 1.2.2.2 yamt void 94 1.2.2.2 yamt augpio_attach(struct device *parent, struct device *self, void *aux) 95 1.2.2.2 yamt { 96 1.2.2.2 yamt int pin; 97 1.2.2.2 yamt 98 1.2.2.2 yamt struct augpio_softc *sc = (struct augpio_softc *)self; 99 1.2.2.2 yamt struct aubus_attach_args *aa = aux; 100 1.2.2.2 yamt struct gpiobus_attach_args gba; 101 1.2.2.2 yamt 102 1.2.2.2 yamt sc->sc_npins = 0; 103 1.2.2.2 yamt 104 1.2.2.2 yamt printf(": Alchemy GPIO"); 105 1.2.2.2 yamt if (aa->aa_addrs[0] == SYS_BASE) { 106 1.2.2.2 yamt 107 1.2.2.2 yamt for (pin = 0; pin < aa->aa_addrs[1]; pin++) { 108 1.2.2.2 yamt 109 1.2.2.2 yamt sc->sc_pins[sc->sc_npins].pin_num = pin; 110 1.2.2.2 yamt sc->sc_pins[sc->sc_npins].pin_caps = 111 1.2.2.2 yamt GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | 112 1.2.2.2 yamt GPIO_PIN_TRISTATE; 113 1.2.2.2 yamt sc->sc_pins[sc->sc_npins].pin_flags = 114 1.2.2.2 yamt au_gpio_ctl(pin, 0); 115 1.2.2.2 yamt sc->sc_pins[sc->sc_npins].pin_state = 116 1.2.2.2 yamt au_gpio_read(pin); 117 1.2.2.2 yamt sc->sc_npins++; 118 1.2.2.2 yamt } 119 1.2.2.2 yamt sc->sc_isgpio2 = 0; 120 1.2.2.2 yamt printf(", primary block"); 121 1.2.2.2 yamt 122 1.2.2.2 yamt } else if (aa->aa_addrs[0] == GPIO2_BASE) { 123 1.2.2.2 yamt /* 124 1.2.2.2 yamt * We rely on firmware (or platform init code) to initialize 125 1.2.2.2 yamt * the GPIO2 block. We can't do it ourselves, because 126 1.2.2.2 yamt * resetting the GPIO2 block can have nasty effects (e.g. 127 1.2.2.2 yamt * reset PCI bus...) 128 1.2.2.2 yamt */ 129 1.2.2.2 yamt for (pin = 0; pin < aa->aa_addrs[1]; pin++) { 130 1.2.2.2 yamt sc->sc_pins[sc->sc_npins].pin_num = pin; 131 1.2.2.2 yamt sc->sc_pins[sc->sc_npins].pin_caps = 132 1.2.2.2 yamt GPIO_PIN_INPUT | GPIO_PIN_OUTPUT; 133 1.2.2.2 yamt sc->sc_pins[sc->sc_npins].pin_flags = 134 1.2.2.2 yamt au_gpio2_ctl(pin, 0); 135 1.2.2.2 yamt sc->sc_pins[sc->sc_npins].pin_state = 136 1.2.2.2 yamt au_gpio2_read(pin); 137 1.2.2.2 yamt sc->sc_npins++; 138 1.2.2.2 yamt } 139 1.2.2.2 yamt 140 1.2.2.2 yamt printf(", secondary block"); 141 1.2.2.2 yamt sc->sc_isgpio2 = 1; 142 1.2.2.2 yamt 143 1.2.2.2 yamt } else { 144 1.2.2.2 yamt printf(", unidentified block"); 145 1.2.2.2 yamt } 146 1.2.2.2 yamt printf("\n"); 147 1.2.2.2 yamt 148 1.2.2.2 yamt sc->sc_gc.gp_cookie = sc; 149 1.2.2.2 yamt sc->sc_gc.gp_pin_read = augpio_pin_read; 150 1.2.2.2 yamt sc->sc_gc.gp_pin_write = augpio_pin_write; 151 1.2.2.2 yamt sc->sc_gc.gp_pin_ctl = augpio_pin_ctl; 152 1.2.2.2 yamt 153 1.2.2.2 yamt gba.gba_gc = &sc->sc_gc; 154 1.2.2.2 yamt gba.gba_pins = sc->sc_pins; 155 1.2.2.2 yamt gba.gba_npins = sc->sc_npins; 156 1.2.2.2 yamt 157 1.2.2.2 yamt config_found_ia(&sc->sc_dev, "gpiobus", &gba, gpiobus_print); 158 1.2.2.2 yamt } 159 1.2.2.2 yamt 160 1.2.2.2 yamt int 161 1.2.2.2 yamt augpio_pin_read(void *arg, int pin) 162 1.2.2.2 yamt { 163 1.2.2.2 yamt struct augpio_softc *sc = arg; 164 1.2.2.2 yamt 165 1.2.2.2 yamt return (sc->sc_isgpio2 ? au_gpio2_read(pin) : au_gpio_read(pin)); 166 1.2.2.2 yamt } 167 1.2.2.2 yamt 168 1.2.2.2 yamt void 169 1.2.2.2 yamt augpio_pin_write(void *arg, int pin, int value) 170 1.2.2.2 yamt { 171 1.2.2.2 yamt struct augpio_softc *sc = arg; 172 1.2.2.2 yamt 173 1.2.2.2 yamt if (sc->sc_isgpio2) 174 1.2.2.2 yamt au_gpio2_write(pin, value); 175 1.2.2.2 yamt else 176 1.2.2.2 yamt au_gpio_write(pin, value); 177 1.2.2.2 yamt } 178 1.2.2.2 yamt 179 1.2.2.2 yamt void 180 1.2.2.2 yamt augpio_pin_ctl(void *arg, int pin, int flags) 181 1.2.2.2 yamt { 182 1.2.2.2 yamt struct augpio_softc *sc = arg; 183 1.2.2.2 yamt 184 1.2.2.2 yamt if (sc->sc_isgpio2) 185 1.2.2.2 yamt (void) au_gpio2_ctl(pin, flags); 186 1.2.2.2 yamt else 187 1.2.2.2 yamt (void) au_gpio_ctl(pin, flags); 188 1.2.2.2 yamt } 189 1.2.2.2 yamt 190 1.2.2.2 yamt int 191 1.2.2.2 yamt au_gpio_read(int pin) 192 1.2.2.2 yamt { 193 1.2.2.2 yamt 194 1.2.2.2 yamt pin = 1 << pin; 195 1.2.2.2 yamt return ((GETREG(SYS_BASE + AUGPIO_SYS_PINSTATERD) & pin) ? 196 1.2.2.2 yamt GPIO_PIN_HIGH : GPIO_PIN_LOW); 197 1.2.2.2 yamt } 198 1.2.2.2 yamt 199 1.2.2.2 yamt void 200 1.2.2.2 yamt au_gpio_write(int pin, int value) 201 1.2.2.2 yamt { 202 1.2.2.2 yamt 203 1.2.2.2 yamt pin = 1 << pin; 204 1.2.2.2 yamt if (value) { 205 1.2.2.2 yamt PUTREG(SYS_BASE + AUGPIO_SYS_OUTPUTSET, pin); 206 1.2.2.2 yamt } else { 207 1.2.2.2 yamt PUTREG(SYS_BASE + AUGPIO_SYS_OUTPUTCLR, pin); 208 1.2.2.2 yamt } 209 1.2.2.2 yamt } 210 1.2.2.2 yamt 211 1.2.2.2 yamt int 212 1.2.2.2 yamt au_gpio_ctl(int pin, int flags) 213 1.2.2.2 yamt { 214 1.2.2.2 yamt uint32_t tri, out; 215 1.2.2.2 yamt int old; 216 1.2.2.2 yamt 217 1.2.2.2 yamt old = 0; 218 1.2.2.2 yamt 219 1.2.2.2 yamt pin = 1 << pin; 220 1.2.2.2 yamt tri = GETREG(SYS_BASE + AUGPIO_SYS_TRIOUTRD); 221 1.2.2.2 yamt out = GETREG(SYS_BASE + AUGPIO_SYS_OUTPUTRD); 222 1.2.2.2 yamt old = 0; 223 1.2.2.2 yamt 224 1.2.2.2 yamt if (tri & pin) { 225 1.2.2.2 yamt old |= GPIO_PIN_INPUT; 226 1.2.2.2 yamt } else { 227 1.2.2.2 yamt old |= GPIO_PIN_OUTPUT; 228 1.2.2.2 yamt } 229 1.2.2.2 yamt 230 1.2.2.2 yamt if (flags & (GPIO_PIN_TRISTATE|GPIO_PIN_INPUT)) { 231 1.2.2.2 yamt PUTREG(SYS_BASE + AUGPIO_SYS_TRIOUTCLR, pin); 232 1.2.2.2 yamt } else if (flags & GPIO_PIN_OUTPUT) { 233 1.2.2.2 yamt if (pin & out) { 234 1.2.2.2 yamt PUTREG(SYS_BASE + AUGPIO_SYS_OUTPUTSET, pin); 235 1.2.2.2 yamt } else { 236 1.2.2.2 yamt PUTREG(SYS_BASE + AUGPIO_SYS_OUTPUTCLR, pin); 237 1.2.2.2 yamt } 238 1.2.2.2 yamt } 239 1.2.2.2 yamt 240 1.2.2.2 yamt return old; 241 1.2.2.2 yamt } 242 1.2.2.2 yamt 243 1.2.2.2 yamt int 244 1.2.2.2 yamt au_gpio2_read(int pin) 245 1.2.2.2 yamt { 246 1.2.2.2 yamt 247 1.2.2.2 yamt pin = 1 << pin; 248 1.2.2.2 yamt 249 1.2.2.2 yamt return ((GETREG(GPIO2_BASE + AUGPIO_GPIO2_PINSTATE) & pin) ? 250 1.2.2.2 yamt GPIO_PIN_HIGH : GPIO_PIN_LOW); 251 1.2.2.2 yamt } 252 1.2.2.2 yamt 253 1.2.2.2 yamt void 254 1.2.2.2 yamt au_gpio2_write(int pin, int value) 255 1.2.2.2 yamt { 256 1.2.2.2 yamt 257 1.2.2.2 yamt pin = 1 << pin; 258 1.2.2.2 yamt 259 1.2.2.2 yamt if (value) { 260 1.2.2.2 yamt PUTREG(GPIO2_BASE + AUGPIO_GPIO2_OUTPUT, (pin | (pin << 16))); 261 1.2.2.2 yamt } else { 262 1.2.2.2 yamt PUTREG(GPIO2_BASE + AUGPIO_GPIO2_OUTPUT, (pin << 16)); 263 1.2.2.2 yamt } 264 1.2.2.2 yamt } 265 1.2.2.2 yamt 266 1.2.2.2 yamt int 267 1.2.2.2 yamt au_gpio2_ctl(int pin, int flags) 268 1.2.2.2 yamt { 269 1.2.2.2 yamt uint32_t dir; 270 1.2.2.2 yamt int old; 271 1.2.2.2 yamt 272 1.2.2.2 yamt pin = 1 << pin; 273 1.2.2.2 yamt 274 1.2.2.2 yamt dir = GETREG(GPIO2_BASE + AUGPIO_GPIO2_DIR); 275 1.2.2.2 yamt old = dir; 276 1.2.2.2 yamt 277 1.2.2.2 yamt if (dir & pin) { 278 1.2.2.2 yamt old |= GPIO_PIN_OUTPUT; 279 1.2.2.2 yamt } else { 280 1.2.2.2 yamt old |= GPIO_PIN_INPUT; 281 1.2.2.2 yamt } 282 1.2.2.2 yamt 283 1.2.2.2 yamt if (flags & GPIO_PIN_INPUT) { 284 1.2.2.2 yamt dir |= pin; 285 1.2.2.2 yamt PUTREG(GPIO2_BASE + AUGPIO_GPIO2_DIR, pin); 286 1.2.2.2 yamt } else if (flags & GPIO_PIN_OUTPUT) { 287 1.2.2.2 yamt dir &= ~pin; 288 1.2.2.2 yamt PUTREG(GPIO2_BASE + AUGPIO_GPIO2_DIR, pin); 289 1.2.2.2 yamt } 290 1.2.2.2 yamt 291 1.2.2.2 yamt return old; 292 1.2.2.2 yamt } 293
Indexes created Fri Oct 03 02:09:57 GMT 2025