/* $OpenBSD: omgpio.c,v 1.12 2020/04/10 22:02:45 kettenis Exp $ */ /* * Copyright (c) 2007,2009 Dale Rahn * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "gpio.h" /* OMAP3 registers */ #define GPIO3_REVISION 0x00 #define GPIO3_SYSCONFIG 0x10 #define GPIO3_SYSSTATUS 0x14 #define GPIO3_IRQSTATUS1 0x18 #define GPIO3_IRQENABLE1 0x1C #define GPIO3_WAKEUPENABLE 0x20 #define GPIO3_IRQSTATUS2 0x28 #define GPIO3_IRQENABLE2 0x2C #define GPIO3_CTRL 0x30 #define GPIO3_OE 0x34 #define GPIO3_DATAIN 0x38 #define GPIO3_DATAOUT 0x3C #define GPIO3_LEVELDETECT0 0x40 #define GPIO3_LEVELDETECT1 0x44 #define GPIO3_RISINGDETECT 0x48 #define GPIO3_FALLINGDETECT 0x4C #define GPIO3_DEBOUNCENABLE 0x50 #define GPIO3_DEBOUNCINGTIME 0x54 #define GPIO3_CLEARIRQENABLE1 0x60 #define GPIO3_SETIRQENABLE1 0x64 #define GPIO3_CLEARIRQENABLE2 0x70 #define GPIO3_SETIRQENABLE2 0x74 #define GPIO3_CLEARWKUENA 0x80 #define GPIO3_SETWKUENA 0x84 #define GPIO3_CLEARDATAOUT 0x90 #define GPIO3_SETDATAOUT 0x94 /* OMAP4 registers */ #define GPIO4_REVISION 0x00 #define GPIO4_SYSCONFIG 0x10 #define GPIO4_IRQSTATUS_RAW_0 0x24 #define GPIO4_IRQSTATUS_RAW_1 0x28 #define GPIO4_IRQSTATUS_0 0x2C #define GPIO4_IRQSTATUS_1 0x30 #define GPIO4_IRQSTATUS_SET_0 0x34 #define GPIO4_IRQSTATUS_SET_1 0x38 #define GPIO4_IRQSTATUS_CLR_0 0x3C #define GPIO4_IRQSTATUS_CLR_1 0x40 #define GPIO4_IRQWAKEN_0 0x44 #define GPIO4_IRQWAKEN_1 0x48 #define GPIO4_SYSSTATUS 0x114 #define GPIO4_WAKEUPENABLE 0x120 #define GPIO4_CTRL 0x130 #define GPIO4_OE 0x134 #define GPIO4_DATAIN 0x138 #define GPIO4_DATAOUT 0x13C #define GPIO4_LEVELDETECT0 0x140 #define GPIO4_LEVELDETECT1 0x144 #define GPIO4_RISINGDETECT 0x148 #define GPIO4_FALLINGDETECT 0x14C #define GPIO4_DEBOUNCENABLE 0x150 #define GPIO4_DEBOUNCINGTIME 0x154 #define GPIO4_CLEARWKUPENA 0x180 #define GPIO4_SETWKUENA 0x184 #define GPIO4_CLEARDATAOUT 0x190 #define GPIO4_SETDATAOUT 0x194 /* AM335X registers */ #define GPIO_AM335X_REVISION 0x00 #define GPIO_AM335X_SYSCONFIG 0x10 #define GPIO_AM335X_IRQSTATUS_RAW_0 0x24 #define GPIO_AM335X_IRQSTATUS_RAW_1 0x28 #define GPIO_AM335X_IRQSTATUS_0 0x2C #define GPIO_AM335X_IRQSTATUS_1 0x30 #define GPIO_AM335X_IRQSTATUS_SET_0 0x34 #define GPIO_AM335X_IRQSTATUS_SET_1 0x38 #define GPIO_AM335X_IRQSTATUS_CLR_0 0x3c #define GPIO_AM335X_IRQSTATUS_CLR_1 0x40 #define GPIO_AM335X_IRQWAKEN_0 0x44 #define GPIO_AM335X_IRQWAKEN_1 0x48 #define GPIO_AM335X_SYSSTATUS 0x114 #define GPIO_AM335X_CTRL 0x130 #define GPIO_AM335X_OE 0x134 #define GPIO_AM335X_DATAIN 0x138 #define GPIO_AM335X_DATAOUT 0x13C #define GPIO_AM335X_LEVELDETECT0 0x140 #define GPIO_AM335X_LEVELDETECT1 0x144 #define GPIO_AM335X_RISINGDETECT 0x148 #define GPIO_AM335X_FALLINGDETECT 0x14C #define GPIO_AM335X_DEBOUNCENABLE 0x150 #define GPIO_AM335X_DEBOUNCINGTIME 0x154 #define GPIO_AM335X_CLEARDATAOUT 0x190 #define GPIO_AM335X_SETDATAOUT 0x194 #define GPIO_NUM_PINS 32 struct intrhand { int (*ih_func)(void *); /* handler */ void *ih_arg; /* arg for handler */ int ih_ipl; /* IPL_* */ int ih_irq; /* IRQ number */ int ih_gpio; /* gpio pin */ struct evcount ih_count; char *ih_name; }; struct omgpio_regs { u_int32_t revision; u_int32_t sysconfig; u_int32_t irqstatus_raw0; /* omap4/am335x only */ u_int32_t irqstatus_raw1; /* omap4/am335x only */ u_int32_t irqstatus0; u_int32_t irqstatus1; u_int32_t irqstatus_set0; u_int32_t irqstatus_set1; u_int32_t irqstatus_clear0; u_int32_t irqstatus_clear1; u_int32_t irqwaken0; u_int32_t irqwaken1; u_int32_t sysstatus; u_int32_t wakeupenable; /* omap3/omap4 only */ u_int32_t ctrl; u_int32_t oe; u_int32_t datain; u_int32_t dataout; u_int32_t leveldetect0; u_int32_t leveldetect1; u_int32_t risingdetect; u_int32_t fallingdetect; u_int32_t debounceenable; u_int32_t debouncingtime; u_int32_t clearwkupena; /* omap3/omap4 only */ u_int32_t setwkupena; /* omap3/omap4 only */ u_int32_t cleardataout; u_int32_t setdataout; }; struct omgpio_softc { struct device sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; void *sc_ih_h; void *sc_ih_l; int sc_max_il; int sc_min_il; int sc_node; struct intrhand *sc_handlers[GPIO_NUM_PINS]; struct gpio_controller sc_gc; int sc_omap_ver; struct gpio_chipset_tag sc_gpio_gc; gpio_pin_t sc_gpio_pins[GPIO_NUM_PINS]; struct omgpio_regs sc_regs; int (*sc_padconf_set_gpioflags)(uint32_t, uint32_t); }; #define GPIO_PIN_TO_INST(x) ((x) >> 5) #define GPIO_PIN_TO_OFFSET(x) ((x) & 0x1f) #define DEVNAME(sc) ((sc)->sc_dev.dv_xname) #define READ4(sc, reg) omgpio_read4(sc, reg) #define WRITE4(sc, reg, val) omgpio_write4(sc, reg, val) u_int32_t omgpio_read4(struct omgpio_softc *, u_int32_t); void omgpio_write4(struct omgpio_softc *, u_int32_t, u_int32_t); int omgpio_match(struct device *, void *, void *); void omgpio_attach(struct device *, struct device *, void *); void omgpio_recalc_interrupts(struct omgpio_softc *); int omgpio_irq(void *); int omgpio_irq_dummy(void *); int omgpio_pin_dir_read(struct omgpio_softc *, unsigned int); void omgpio_pin_dir_write(struct omgpio_softc *, unsigned int, unsigned int); void omgpio_config_pin(void *, uint32_t *, int); int omgpio_get_pin(void *, uint32_t *); void omgpio_set_pin(void *, uint32_t *, int); struct cfattach omgpio_ca = { sizeof (struct omgpio_softc), omgpio_match, omgpio_attach }; struct cfdriver omgpio_cd = { NULL, "omgpio", DV_DULL }; const char *omgpio_compatible[] = { "ti,omap3-gpio", "ti,omap4-gpio", NULL }; u_int32_t omgpio_read4(struct omgpio_softc *sc, u_int32_t reg) { if(reg == -1) panic("%s: Invalid register address", DEVNAME(sc)); return bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)); } void omgpio_write4(struct omgpio_softc *sc, u_int32_t reg, u_int32_t val) { if(reg == -1) panic("%s: Invalid register address", DEVNAME(sc)); bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)); } int omgpio_match(struct device *parent, void *match, void *aux) { struct fdt_attach_args *faa = aux; int i; for (i = 0; omgpio_compatible[i] != NULL; i++) { if (OF_is_compatible(faa->fa_node, omgpio_compatible[i])) return 1; } return 0; } void omgpio_attach(struct device *parent, struct device *self, void *aux) { struct fdt_attach_args *faa = aux; struct omgpio_softc *sc = (struct omgpio_softc *) self; struct gpiobus_attach_args gba; u_int32_t rev; int i, len, unit; char hwmods[64]; if (faa->fa_nreg < 1) return; unit = -1; if ((len = OF_getprop(faa->fa_node, "ti,hwmods", hwmods, sizeof(hwmods))) == 6) { if ((strncmp(hwmods, "gpio", 4) == 0) && (hwmods[4] > '0') && (hwmods[4] <= '9')) unit = hwmods[4] - '1'; } if (unit != -1) prcm_enablemodule(PRCM_GPIO0 + unit); sc->sc_node = faa->fa_node; sc->sc_iot = faa->fa_iot; if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size, 0, &sc->sc_ioh)) panic("%s: bus_space_map failed!", DEVNAME(sc)); if (OF_is_compatible(faa->fa_node, "ti,omap3-gpio")) { sc->sc_padconf_set_gpioflags = NULL; sc->sc_regs.revision = GPIO3_REVISION; sc->sc_regs.sysconfig = GPIO3_SYSCONFIG; sc->sc_regs.irqstatus_raw0 = -1; sc->sc_regs.irqstatus_raw1 = -1; sc->sc_regs.irqstatus0 = GPIO3_IRQSTATUS1; sc->sc_regs.irqstatus1 = GPIO3_IRQSTATUS2; sc->sc_regs.irqstatus_set0 = GPIO3_SETIRQENABLE1; sc->sc_regs.irqstatus_set1 = GPIO3_SETIRQENABLE2; sc->sc_regs.irqstatus_clear0 = GPIO3_CLEARIRQENABLE1; sc->sc_regs.irqstatus_clear1 = GPIO3_CLEARIRQENABLE2; sc->sc_regs.irqwaken0 = -1; sc->sc_regs.irqwaken1 = -1; sc->sc_regs.sysstatus = GPIO3_SYSSTATUS; sc->sc_regs.wakeupenable = GPIO3_WAKEUPENABLE; sc->sc_regs.ctrl = GPIO3_CTRL; sc->sc_regs.oe = GPIO3_OE; sc->sc_regs.datain = GPIO3_DATAIN; sc->sc_regs.dataout = GPIO3_DATAOUT; sc->sc_regs.leveldetect0 = GPIO3_LEVELDETECT0; sc->sc_regs.leveldetect1 = GPIO3_LEVELDETECT1; sc->sc_regs.risingdetect = GPIO3_RISINGDETECT; sc->sc_regs.fallingdetect = GPIO3_FALLINGDETECT; sc->sc_regs.debounceenable = GPIO3_DEBOUNCENABLE; sc->sc_regs.debouncingtime = GPIO3_DEBOUNCINGTIME; sc->sc_regs.clearwkupena = GPIO3_CLEARWKUENA; sc->sc_regs.setwkupena = GPIO3_SETWKUENA; sc->sc_regs.cleardataout = GPIO3_CLEARDATAOUT; sc->sc_regs.setdataout = GPIO3_SETDATAOUT; } else if (OF_is_compatible(faa->fa_node, "ti,omap4-gpio")) { sc->sc_padconf_set_gpioflags = NULL; sc->sc_regs.revision = GPIO4_REVISION; sc->sc_regs.sysconfig = GPIO4_SYSCONFIG; sc->sc_regs.irqstatus_raw0 = GPIO4_IRQSTATUS_RAW_0; sc->sc_regs.irqstatus_raw1 = GPIO4_IRQSTATUS_RAW_1; sc->sc_regs.irqstatus0 = GPIO4_IRQSTATUS_0; sc->sc_regs.irqstatus1 = GPIO4_IRQSTATUS_1; sc->sc_regs.irqstatus_set0 = GPIO4_IRQSTATUS_SET_0; sc->sc_regs.irqstatus_set1 = GPIO4_IRQSTATUS_SET_1; sc->sc_regs.irqstatus_clear0 = GPIO4_IRQSTATUS_CLR_0; sc->sc_regs.irqstatus_clear1 = GPIO4_IRQSTATUS_CLR_1; sc->sc_regs.irqwaken0 = GPIO4_IRQWAKEN_0; sc->sc_regs.irqwaken1 = GPIO4_IRQWAKEN_1; sc->sc_regs.sysstatus = GPIO4_SYSSTATUS; sc->sc_regs.wakeupenable = -1; sc->sc_regs.ctrl = GPIO4_CTRL; sc->sc_regs.oe = GPIO4_OE; sc->sc_regs.datain = GPIO4_DATAIN; sc->sc_regs.dataout = GPIO4_DATAOUT; sc->sc_regs.leveldetect0 = GPIO4_LEVELDETECT0; sc->sc_regs.leveldetect1 = GPIO4_LEVELDETECT1; sc->sc_regs.risingdetect = GPIO4_RISINGDETECT; sc->sc_regs.fallingdetect = GPIO4_FALLINGDETECT; sc->sc_regs.debounceenable = GPIO4_DEBOUNCENABLE; sc->sc_regs.debouncingtime = GPIO4_DEBOUNCINGTIME; sc->sc_regs.clearwkupena = -1; sc->sc_regs.setwkupena = -1; sc->sc_regs.cleardataout = GPIO4_CLEARDATAOUT; sc->sc_regs.setdataout = GPIO4_SETDATAOUT; } else panic("%s: could not find a compatible soc", sc->sc_dev.dv_xname); rev = READ4(sc, sc->sc_regs.revision); printf(": rev %d.%d\n", rev >> 4 & 0xf, rev & 0xf); WRITE4(sc, sc->sc_regs.irqstatus_clear0, ~0); WRITE4(sc, sc->sc_regs.irqstatus_clear1, ~0); /* XXX - SYSCONFIG */ /* XXX - CTRL */ /* XXX - DEBOUNCE */ for (i = 0; i < GPIO_NUM_PINS; i++) { sc->sc_gpio_pins[i].pin_num = i; sc->sc_gpio_pins[i].pin_caps = GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN; sc->sc_gpio_pins[i].pin_state = omgpio_pin_read(sc, i) ? GPIO_PIN_HIGH : GPIO_PIN_LOW; sc->sc_gpio_pins[i].pin_flags = GPIO_PIN_SET; } sc->sc_gc.gc_node = sc->sc_node; sc->sc_gc.gc_cookie = sc; sc->sc_gc.gc_config_pin = omgpio_config_pin; sc->sc_gc.gc_get_pin = omgpio_get_pin; sc->sc_gc.gc_set_pin = omgpio_set_pin; gpio_controller_register(&sc->sc_gc); sc->sc_gpio_gc.gp_cookie = sc; sc->sc_gpio_gc.gp_pin_read = omgpio_pin_read; sc->sc_gpio_gc.gp_pin_write = omgpio_pin_write; sc->sc_gpio_gc.gp_pin_ctl = omgpio_pin_ctl; gba.gba_name = "gpio"; gba.gba_gc = &sc->sc_gpio_gc; gba.gba_pins = sc->sc_gpio_pins; gba.gba_npins = GPIO_NUM_PINS; #if NGPIO > 0 config_found(&sc->sc_dev, &gba, gpiobus_print); #endif } /* XXX - This assumes MCU INTERRUPTS are IRQ1, and DSP are IRQ2 */ #if 0 /* XXX - FIND THESE REGISTERS !!! */ unsigned int omgpio_get_function(unsigned int gpio, unsigned int fn) { return 0; } void omgpio_set_function(unsigned int gpio, unsigned int fn) { } #endif void omgpio_config_pin(void *cookie, uint32_t *cells, int config) { struct omgpio_softc *sc = cookie; uint32_t pin = cells[0]; if (pin >= GPIO_NUM_PINS) return; if (config & GPIO_CONFIG_OUTPUT) omgpio_pin_dir_write(sc, pin, OMGPIO_DIR_OUT); else omgpio_pin_dir_write(sc, pin, OMGPIO_DIR_IN); } int omgpio_get_pin(void *cookie, uint32_t *cells) { struct omgpio_softc *sc = cookie; uint32_t pin = cells[0]; uint32_t flags = cells[1]; int val; if (pin >= GPIO_NUM_PINS) return 0; val = omgpio_pin_read(sc, pin); if (flags & GPIO_ACTIVE_LOW) val = !val; return val; } void omgpio_set_pin(void *cookie, uint32_t *cells, int val) { struct omgpio_softc *sc = cookie; uint32_t pin = cells[0]; uint32_t flags = cells[1]; if (pin >= GPIO_NUM_PINS) return; if (flags & GPIO_ACTIVE_LOW) val = !val; omgpio_pin_write(sc, pin, val); } unsigned int omgpio_get_bit(unsigned int gpio) { struct omgpio_softc *sc = omgpio_cd.cd_devs[GPIO_PIN_TO_INST(gpio)]; return omgpio_pin_read(sc, GPIO_PIN_TO_OFFSET(gpio)); } void omgpio_set_bit(unsigned int gpio) { struct omgpio_softc *sc = omgpio_cd.cd_devs[GPIO_PIN_TO_INST(gpio)]; omgpio_pin_write(sc, GPIO_PIN_TO_OFFSET(gpio), GPIO_PIN_HIGH); } void omgpio_clear_bit(unsigned int gpio) { struct omgpio_softc *sc = omgpio_cd.cd_devs[GPIO_PIN_TO_INST(gpio)]; omgpio_pin_write(sc, GPIO_PIN_TO_OFFSET(gpio), GPIO_PIN_LOW); } void omgpio_set_dir(unsigned int gpio, unsigned int dir) { struct omgpio_softc *sc = omgpio_cd.cd_devs[GPIO_PIN_TO_INST(gpio)]; omgpio_pin_dir_write(sc, GPIO_PIN_TO_OFFSET(gpio), dir); } int omgpio_pin_read(void *arg, int pin) { struct omgpio_softc *sc = arg; u_int32_t reg; if(omgpio_pin_dir_read(sc, pin) == OMGPIO_DIR_IN) reg = READ4(sc, sc->sc_regs.datain); else reg = READ4(sc, sc->sc_regs.dataout); return (reg >> GPIO_PIN_TO_OFFSET(pin)) & 0x1; } void omgpio_pin_write(void *arg, int pin, int value) { struct omgpio_softc *sc = arg; if (value) WRITE4(sc, sc->sc_regs.setdataout, 1 << GPIO_PIN_TO_OFFSET(pin)); else WRITE4(sc, sc->sc_regs.cleardataout, 1 << GPIO_PIN_TO_OFFSET(pin)); } void omgpio_pin_ctl(void *arg, int pin, int flags) { struct omgpio_softc *sc = arg; if (flags & GPIO_PIN_INPUT) omgpio_pin_dir_write(sc, pin, OMGPIO_DIR_IN); else if (flags & GPIO_PIN_OUTPUT) omgpio_pin_dir_write(sc, pin, OMGPIO_DIR_OUT); if (sc->sc_padconf_set_gpioflags) sc->sc_padconf_set_gpioflags( sc->sc_dev.dv_unit * GPIO_NUM_PINS + pin, flags); } void omgpio_pin_dir_write(struct omgpio_softc *sc, unsigned int gpio, unsigned int dir) { int s; u_int32_t reg; s = splhigh(); reg = READ4(sc, sc->sc_regs.oe); if (dir == OMGPIO_DIR_IN) reg |= 1 << GPIO_PIN_TO_OFFSET(gpio); else reg &= ~(1 << GPIO_PIN_TO_OFFSET(gpio)); WRITE4(sc, sc->sc_regs.oe, reg); splx(s); } int omgpio_pin_dir_read(struct omgpio_softc *sc, unsigned int gpio) { u_int32_t reg; reg = READ4(sc, sc->sc_regs.oe); if (reg & (1 << GPIO_PIN_TO_OFFSET(gpio))) return OMGPIO_DIR_IN; else return OMGPIO_DIR_OUT; } #if 0 void omgpio_clear_intr(struct omgpio_softc *sc, unsigned int gpio) { struct omgpio_softc *sc = omgpio_cd.cd_devs[GPIO_PIN_TO_INST(gpio)]; WRITE4(sc, sc->sc_regs.irqstatus0, 1 << GPIO_PIN_TO_OFFSET(gpio)); } void omgpio_intr_mask(struct omgpio_softc *sc, unsigned int gpio) { struct omgpio_softc *sc = omgpio_cd.cd_devs[GPIO_PIN_TO_INST(gpio)]; WRITE4(sc, sc->sc_regs.irqstatus_clear0, 1 << GPIO_PIN_TO_OFFSET(gpio)); } void omgpio_intr_unmask(struct omgpio_softc *sc, unsigned int gpio) { struct omgpio_softc *sc = omgpio_cd.cd_devs[GPIO_PIN_TO_INST(gpio)]; WRITE4(sc, sc->sc_regs.irqstatus_set0, 1 << GPIO_PIN_TO_OFFSET(gpio)); } void omgpio_intr_level(struct omgpio_softc *sc, unsigned int gpio, unsigned int level) { u_int32_t fe, re, l0, l1, bit; struct omgpio_softc *sc = omgpio_cd.cd_devs[GPIO_PIN_TO_INST(gpio)]; int s; s = splhigh(); fe = READ4(sc, sc->sc_regs.fallingdetect); re = READ4(sc, sc->sc_regs.risingdetect); l0 = READ4(sc, sc->sc_regs.leveldetect0); l1 = READ4(sc, sc->sc_regs.leveldetect1); bit = 1 << GPIO_PIN_TO_OFFSET(gpio); switch (level) { case IST_NONE: fe &= ~bit; re &= ~bit; l0 &= ~bit; l1 &= ~bit; break; case IST_EDGE_FALLING: fe |= bit; re &= ~bit; l0 &= ~bit; l1 &= ~bit; break; case IST_EDGE_RISING: fe &= ~bit; re |= bit; l0 &= ~bit; l1 &= ~bit; break; case IST_PULSE: /* XXX */ /* FALLTHRU */ case IST_EDGE_BOTH: fe |= bit; re |= bit; l0 &= ~bit; l1 &= ~bit; break; case IST_LEVEL_LOW: fe &= ~bit; re &= ~bit; l0 |= bit; l1 &= ~bit; break; case IST_LEVEL_HIGH: fe &= ~bit; re &= ~bit; l0 &= ~bit; l1 |= bit; break; default: panic("omgpio_intr_level: bad level: %d", level); break; } WRITE4(sc, sc->sc_regs.fallingdetect, fe); WRITE4(sc, sc->sc_regs.risingdetect, re); WRITE4(sc, sc->sc_regs.leveldetect0, l0); WRITE4(sc, sc->sc_regs.leveldetect1, l1); splx(s); } void * omgpio_intr_establish(struct omgpio_softc *sc, unsigned int gpio, int level, int spl, int (*func)(void *), void *arg, char *name) { int psw; struct intrhand *ih; struct omgpio_softc *sc; /* * XXX - is gpio here the pin or the interrupt number * which is 96 + gpio pin? */ if (GPIO_PIN_TO_INST(gpio) > omgpio_cd.cd_ndevs) panic("omgpio_intr_establish: bogus irqnumber %d: %s", gpio, name); sc = omgpio_cd.cd_devs[GPIO_PIN_TO_INST(gpio)]; if (sc->sc_handlers[GPIO_PIN_TO_OFFSET(gpio)] != NULL) panic("omgpio_intr_establish: gpio pin busy %d old %s new %s", gpio, sc->sc_handlers[GPIO_PIN_TO_OFFSET(gpio)]->ih_name, name); psw = disable_interrupts(PSR_I); ih = malloc(sizeof(*ih), M_DEVBUF, M_WAITOK); ih->ih_func = func; ih->ih_arg = arg; ih->ih_ipl = level; ih->ih_gpio = gpio; ih->ih_irq = gpio + 512; ih->ih_name = name; sc->sc_handlers[GPIO_PIN_TO_OFFSET(gpio)] = ih; evcount_attach(&ih->ih_count, name, &ih->ih_irq); omgpio_intr_level(gpio, level); omgpio_intr_unmask(gpio); omgpio_recalc_interrupts(sc); restore_interrupts(psw); return (ih); } void omgpio_intr_disestablish(struct omgpio_softc *sc, void *cookie) { int psw; struct intrhand *ih = cookie; struct omgpio_softc *sc = omgpio_cd.cd_devs[GPIO_PIN_TO_INST(ih->ih_gpio)]; int gpio = ih->ih_gpio; psw = disable_interrupts(PSR_I); ih = sc->sc_handlers[GPIO_PIN_TO_OFFSET(gpio)]; sc->sc_handlers[GPIO_PIN_TO_OFFSET(gpio)] = NULL; evcount_detach(&ih->ih_count); free(ih, M_DEVBUF, 0); omgpio_intr_level(gpio, IST_NONE); omgpio_intr_mask(gpio); omgpio_clear_intr(gpio); /* Just in case */ omgpio_recalc_interrupts(sc); restore_interrupts(psw); } int omgpio_irq(void *v) { struct omgpio_softc *sc = v; u_int32_t pending; struct intrhand *ih; int bit; pending = READ4(sc, omgpio.irqstatus0); while (pending != 0) { bit = ffs(pending) - 1; ih = sc->sc_handlers[bit]; if (ih != NULL) { if (ih->ih_func(ih->ih_arg)) ih->ih_count.ec_count++; omgpio_clear_intr(ih->ih_gpio); } else { panic("omgpio: irq fired no handler, gpio %x %x %x", sc->sc_dev.dv_unit * 32 + bit, pending, READ4(sc, omgpio.irqstatus0) ); } pending &= ~(1 << bit); } return 1; } int omgpio_irq_dummy(void *v) { return 0; } void omgpio_recalc_interrupts(struct omgpio_softc *sc) { struct intrhand *ih; int max = IPL_NONE; int min = IPL_HIGH; int i; for (i = 0; i < GPIO_NUM_PINS; i++) { ih = sc->sc_handlers[i]; if (ih != NULL) { if (ih->ih_ipl > max) max = ih->ih_ipl; if (ih->ih_ipl < min) min = ih->ih_ipl; } } if (max == IPL_NONE) min = IPL_NONE; #if 0 if ((max == IPL_NONE || max != sc->sc_max_il) && sc->sc_ih_h != NULL) arm_intr_disestablish_fdt(sc->sc_ih_h); if (max != IPL_NONE && max != sc->sc_max_il) { sc->sc_ih_h = arm_intr_establish_fdt(sc->sc_node, max, omgpio_irq, sc, NULL); } #else if (sc->sc_ih_h != NULL) arm_intr_disestablish_fdt(sc->sc_ih_h); if (max != IPL_NONE) { sc->sc_ih_h = arm_intr_establish_fdt(sc->sc_node, max, omgpio_irq, sc, NULL); } #endif sc->sc_max_il = max; if (sc->sc_ih_l != NULL) arm_intr_disestablish_fdt(sc->sc_ih_l); if (max != min) { sc->sc_ih_h = arm_intr_establish_fdt(sc->sc_node, min, omgpio_irq_dummy, sc, NULL); } sc->sc_min_il = min; } #endif