/* $NetBSD: hwgpio.c,v 1.2 2026/01/23 09:58:55 jmcneill Exp $ */ /*- * Copyright (c) 2024-2026 Jared McNeill * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: hwgpio.c,v 1.2 2026/01/23 09:58:55 jmcneill Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include "ahb.h" #define PIN(_num, _name, _caps) \ { .pin_num = (_num), \ .pin_caps = (_caps), \ .pin_defname = (_name), \ } static gpio_pin_t hwgpio0_pins_wii[] = { PIN( 0, "POWER", GPIO_PIN_INPUT), PIN( 1, "SHUTDOWN", GPIO_PIN_OUTPUT), PIN( 2, "FAN", GPIO_PIN_OUTPUT), PIN( 3, "DC_DC", GPIO_PIN_OUTPUT), PIN( 4, "DI_SPIN", GPIO_PIN_OUTPUT), PIN( 5, "SLOT_LED", GPIO_PIN_OUTPUT), PIN( 6, "EJECT_BTN", GPIO_PIN_INPUT), PIN( 7, "SLOT_IN", GPIO_PIN_INPUT), PIN( 8, "SENSOR_BAR", GPIO_PIN_OUTPUT), PIN( 9, "DO_EJECT", GPIO_PIN_OUTPUT), PIN(10, "EEP_CS", GPIO_PIN_OUTPUT), PIN(11, "EEP_CLK", GPIO_PIN_OUTPUT), PIN(12, "EEP_MOSI", GPIO_PIN_OUTPUT), PIN(13, "EEP_MISO", GPIO_PIN_INPUT), PIN(14, "AVE_SCL", GPIO_PIN_OUTPUT), PIN(15, "AVE_SDA", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN(16, "DEBUG0", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN(17, "DEBUG1", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN(18, "DEBUG2", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN(19, "DEBUG3", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN(20, "DEBUG4", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN(21, "DEBUG5", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN(22, "DEBUG6", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN(23, "DEBUG7", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), }; static gpio_pin_t hwgpio0_pins_wiiu[] = { PIN( 0, "RtcSysInt", GPIO_PIN_INPUT), PIN( 1, "DwifiMode", GPIO_PIN_OUTPUT), PIN( 2, "FanPower", GPIO_PIN_OUTPUT), PIN( 3, "DcdcPowerControl", GPIO_PIN_OUTPUT), PIN( 5, "Esp10Workaround", GPIO_PIN_OUTPUT), PIN( 6, "DRCPWRREQ", GPIO_PIN_OUTPUT), PIN( 7, "JIG", GPIO_PIN_INPUT), PIN( 8, "PadPd", GPIO_PIN_OUTPUT), PIN(10, "EepromCs", GPIO_PIN_OUTPUT), PIN(11, "EepromSk", GPIO_PIN_OUTPUT), PIN(12, "EepromDo", GPIO_PIN_OUTPUT), PIN(13, "EepromDi", GPIO_PIN_INPUT), PIN(14, "Av0I2cClock", GPIO_PIN_OUTPUT), PIN(15, "Av0I2cData", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN(24, "Av1I2cClock", GPIO_PIN_OUTPUT), PIN(25, "Av1I2cData", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN(26, "MuteLamp", GPIO_PIN_OUTPUT), PIN(27, "BluetoothMode", GPIO_PIN_OUTPUT), PIN(28, "CcrhReset", GPIO_PIN_OUTPUT), PIN(29, "WifiMode", GPIO_PIN_OUTPUT), PIN(30, "Sdcc0s0Power", GPIO_PIN_OUTPUT), }; static gpio_pin_t hwgpio1_pins_wiiu[] = { PIN( 0, "FanSpeed", GPIO_PIN_OUTPUT), PIN( 1, "SmcScl", GPIO_PIN_OUTPUT), PIN( 2, "SmcSda", GPIO_PIN_INPUT | GPIO_PIN_OUTPUT), PIN( 3, "DcdcPowerControl2", GPIO_PIN_OUTPUT), PIN( 4, "AvInt", GPIO_PIN_INPUT), PIN( 5, "Ccrhlo12", GPIO_PIN_OUTPUT), PIN( 6, "AvReset", GPIO_PIN_OUTPUT), }; #undef PIN struct hwgpio_softc { struct gpio_chipset_tag sc_gp; bus_space_tag_t sc_bst; bus_space_handle_t sc_bsh; kmutex_t sc_lock; }; #define GPIO0_ADDR 0x0d0000c0 #define GPIO1_ADDR 0x0d000520 #define GPIO_SIZE 0x40 #define GPIOB_OUT 0x00 #define GPIOB_DIR 0x04 #define GPIOB_IN 0x08 #define RD4(sc, reg) \ bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg)) #define WR4(sc, reg, val) \ bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val)) static int hwgpio_pin_read(void *priv, int pin) { struct hwgpio_softc * const sc = priv; return (RD4(sc, GPIOB_IN) & __BIT(pin)) != 0; } static void hwgpio_pin_write(void *priv, int pin, int value) { struct hwgpio_softc * const sc = priv; uint32_t out; mutex_enter(&sc->sc_lock); out = RD4(sc, GPIOB_OUT); if (value) { out |= __BIT(pin); } else { out &= ~__BIT(pin); } WR4(sc, GPIOB_OUT, out); mutex_exit(&sc->sc_lock); } static void hwgpio_pin_ctl(void *priv, int pin, int flags) { struct hwgpio_softc * const sc = priv; uint32_t dir; mutex_enter(&sc->sc_lock); dir = RD4(sc, GPIOB_DIR); if (flags & GPIO_PIN_OUTPUT) { dir |= __BIT(pin); } else { dir &= ~__BIT(pin); } WR4(sc, GPIOB_DIR, dir); mutex_exit(&sc->sc_lock); } static int hwgpio_match(device_t parent, cfdata_t cf, void *aux) { struct ahb_attach_args * const aaa = aux; if (wiiu_plat) { return aaa->aaa_addr == GPIO0_ADDR || aaa->aaa_addr == GPIO1_ADDR; } else { return aaa->aaa_addr == GPIO0_ADDR; } } static void hwgpio_attach(device_t parent, device_t self, void *aux) { struct hwgpio_softc * const sc = device_private(self); struct ahb_attach_args * const aaa = aux; struct gpio_chipset_tag *gp = &sc->sc_gp; struct gpiobus_attach_args gba = {}; uint32_t in, out, dir; gpio_pin_t *pins; int error; u_int n, npins; sc->sc_bst = aaa->aaa_bst; error = bus_space_map(sc->sc_bst, aaa->aaa_addr, GPIO_SIZE, 0, &sc->sc_bsh); if (error != 0) { aprint_error(": couldn't map registers (%d)\n", error); return; } mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_HIGH); gp->gp_cookie = sc; gp->gp_pin_read = hwgpio_pin_read; gp->gp_pin_write = hwgpio_pin_write; gp->gp_pin_ctl = hwgpio_pin_ctl; aprint_naive("\n"); aprint_normal(": GPIO\n"); if (wiiu_plat) { if (aaa->aaa_addr == GPIO0_ADDR) { pins = hwgpio0_pins_wiiu; npins = __arraycount(hwgpio0_pins_wiiu); } else { KASSERT(aaa->aaa_addr == GPIO1_ADDR); pins = hwgpio1_pins_wiiu; npins = __arraycount(hwgpio1_pins_wiiu); } } else { KASSERT(aaa->aaa_addr == GPIO0_ADDR); pins = hwgpio0_pins_wii; npins = __arraycount(hwgpio0_pins_wii); } in = RD4(sc, GPIOB_IN); out = RD4(sc, GPIOB_OUT); dir = RD4(sc, GPIOB_DIR); for (n = 0; n < npins; n++) { const uint32_t mask = __BIT(pins[n].pin_num); if (dir & mask) { pins[n].pin_state = (out & mask) != 0; } else { pins[n].pin_state = (in & mask) != 0; } } gba.gba_gc = &sc->sc_gp; gba.gba_pins = pins; gba.gba_npins = npins; config_found(self, &gba, NULL, CFARGS_NONE); } CFATTACH_DECL_NEW(hwgpio, sizeof(struct hwgpio_softc), hwgpio_match, hwgpio_attach, NULL, NULL);