/* $OpenBSD: qcgpio.c,v 1.1 2022/08/31 16:10:59 kettenis Exp $ */ /* * Copyright (c) 2022 Mark Kettenis * * 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 /* Registers. */ #define TLMM_GPIO_IN_OUT(pin) (0x0004 + 0x1000 * (pin)) #define TLMM_GPIO_IN_OUT_GPIO_IN (1 << 0) #define TLMM_GPIO_IN_OUT_GPIO_OUT (1 << 1) #define TLMM_GPIO_INTR_CFG(pin) (0x0008 + 0x1000 * (pin)) #define TLMM_GPIO_INTR_CFG_TARGET_PROC_MASK (0x7 << 5) #define TLMM_GPIO_INTR_CFG_TARGET_PROC_RPM (0x3 << 5) #define TLMM_GPIO_INTR_CFG_INTR_RAW_STATUS_EN (1 << 4) #define TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_MASK (0x3 << 2) #define TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_LEVEL (0x0 << 2) #define TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_EDGE_POS (0x1 << 2) #define TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_EDGE_NEG (0x2 << 2) #define TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_EDGE_BOTH (0x3 << 2) #define TLMM_GPIO_INTR_CFG_INTR_POL_CTL (1 << 1) #define TLMM_GPIO_INTR_CFG_INTR_ENABLE (1 << 0) #define TLMM_GPIO_INTR_STATUS(pin) (0x000c + 0x1000 * (pin)) #define TLMM_GPIO_INTR_STATUS_INTR_STATUS (1 << 0) #define HREAD4(sc, reg) \ (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg))) #define HWRITE4(sc, reg, val) \ bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) #define HSET4(sc, reg, bits) \ HWRITE4((sc), (reg), HREAD4((sc), (reg)) | (bits)) #define HCLR4(sc, reg, bits) \ HWRITE4((sc), (reg), HREAD4((sc), (reg)) & ~(bits)) struct qcgpio_intrhand { int (*ih_func)(void *); void *ih_arg; }; struct qcgpio_softc { struct device sc_dev; struct acpi_softc *sc_acpi; struct aml_node *sc_node; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; void *sc_ih; uint32_t sc_npins; struct qcgpio_intrhand *sc_pin_ih; struct acpi_gpio sc_gpio; }; int qcgpio_match(struct device *, void *, void *); void qcgpio_attach(struct device *, struct device *, void *); const struct cfattach qcgpio_ca = { sizeof(struct qcgpio_softc), qcgpio_match, qcgpio_attach }; struct cfdriver qcgpio_cd = { NULL, "qcgpio", DV_DULL }; const char *qcgpio_hids[] = { "QCOM060C", NULL }; int qcgpio_read_pin(void *, int); void qcgpio_write_pin(void *, int, int); void qcgpio_intr_establish(void *, int, int, int (*)(void *), void *); int qcgpio_pin_intr(struct qcgpio_softc *, int); int qcgpio_intr(void *); int qcgpio_match(struct device *parent, void *match, void *aux) { struct acpi_attach_args *aaa = aux; struct cfdata *cf = match; if (aaa->aaa_naddr < 1 || aaa->aaa_nirq < 1) return 0; return acpi_matchhids(aaa, qcgpio_hids, cf->cf_driver->cd_name); } void qcgpio_attach(struct device *parent, struct device *self, void *aux) { struct acpi_attach_args *aaa = aux; struct qcgpio_softc *sc = (struct qcgpio_softc *)self; sc->sc_acpi = (struct acpi_softc *)parent; sc->sc_node = aaa->aaa_node; printf(" %s", sc->sc_node->name); printf(" addr 0x%llx/0x%llx", aaa->aaa_addr[0], aaa->aaa_size[0]); sc->sc_iot = aaa->aaa_bst[0]; if (bus_space_map(sc->sc_iot, aaa->aaa_addr[0], aaa->aaa_size[0], 0, &sc->sc_ioh)) { printf(": can't map registers\n"); return; } sc->sc_npins = 1024; sc->sc_pin_ih = mallocarray(sc->sc_npins, sizeof(*sc->sc_pin_ih), M_DEVBUF, M_WAITOK | M_ZERO); printf(" irq %d", aaa->aaa_irq[0]); sc->sc_ih = acpi_intr_establish(aaa->aaa_irq[0], aaa->aaa_irq_flags[0], IPL_BIO, qcgpio_intr, sc, sc->sc_dev.dv_xname); if (sc->sc_ih == NULL) { printf(": can't establish interrupt\n"); goto unmap; } sc->sc_gpio.cookie = sc; sc->sc_gpio.read_pin = qcgpio_read_pin; sc->sc_gpio.write_pin = qcgpio_write_pin; sc->sc_gpio.intr_establish = qcgpio_intr_establish; sc->sc_node->gpio = &sc->sc_gpio; printf("\n"); #if 0 /* XXX */ HWRITE4(sc, 0x0008 + 0x1000 * 104, 0x71); HWRITE4(sc, 0x0008 + 0x1000 * 182, 0x71); #endif acpi_register_gpio(sc->sc_acpi, sc->sc_node); return; unmap: if (sc->sc_ih) acpi_intr_disestablish(sc->sc_ih); free(sc->sc_pin_ih, M_DEVBUF, sc->sc_npins * sizeof(*sc->sc_pin_ih)); bus_space_unmap(sc->sc_iot, sc->sc_ioh, aaa->aaa_size[0]); } int qcgpio_pin_map(int pin) { switch (pin) { case 832: return 104; case 896: return 182; default: return -1; } } int qcgpio_read_pin(void *cookie, int pin) { struct qcgpio_softc *sc = cookie; uint32_t reg; pin = qcgpio_pin_map(pin); if (pin < 0 || pin >= sc->sc_npins) return 0; reg = HREAD4(sc, TLMM_GPIO_IN_OUT(pin)); return !!(reg & TLMM_GPIO_IN_OUT_GPIO_IN); } void qcgpio_write_pin(void *cookie, int pin, int val) { struct qcgpio_softc *sc = cookie; pin = qcgpio_pin_map(pin); if (pin < 0 || pin >= sc->sc_npins) return; if (val) HSET4(sc, TLMM_GPIO_IN_OUT(pin), TLMM_GPIO_IN_OUT_GPIO_OUT); else HCLR4(sc, TLMM_GPIO_IN_OUT(pin), TLMM_GPIO_IN_OUT_GPIO_OUT); } void qcgpio_intr_establish(void *cookie, int pin, int flags, int (*func)(void *), void *arg) { struct qcgpio_softc *sc = cookie; uint32_t reg; pin = qcgpio_pin_map(pin); if (pin < 0 || pin >= sc->sc_npins) return; sc->sc_pin_ih[pin].ih_func = func; sc->sc_pin_ih[pin].ih_arg = arg; reg = HREAD4(sc, TLMM_GPIO_INTR_CFG(pin)); reg &= ~TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_MASK; reg &= ~TLMM_GPIO_INTR_CFG_INTR_POL_CTL; switch (flags & (LR_GPIO_MODE | LR_GPIO_POLARITY)) { case LR_GPIO_LEVEL | LR_GPIO_ACTLO: reg |= TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_LEVEL; break; case LR_GPIO_LEVEL | LR_GPIO_ACTHI: reg |= TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_LEVEL | TLMM_GPIO_INTR_CFG_INTR_POL_CTL; break; case LR_GPIO_EDGE | LR_GPIO_ACTLO: reg |= TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_EDGE_NEG | TLMM_GPIO_INTR_CFG_INTR_POL_CTL; break; case LR_GPIO_EDGE | LR_GPIO_ACTHI: reg |= TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_EDGE_POS | TLMM_GPIO_INTR_CFG_INTR_POL_CTL; break; case LR_GPIO_EDGE | LR_GPIO_ACTBOTH: reg |= TLMM_GPIO_INTR_CFG_INTR_DECT_CTL_EDGE_BOTH; break; default: printf("%s: unsupported interrupt mode/polarity\n", sc->sc_dev.dv_xname); break; } reg &= ~TLMM_GPIO_INTR_CFG_TARGET_PROC_MASK; reg |= TLMM_GPIO_INTR_CFG_TARGET_PROC_RPM; reg |= TLMM_GPIO_INTR_CFG_INTR_RAW_STATUS_EN; reg |= TLMM_GPIO_INTR_CFG_INTR_ENABLE; HWRITE4(sc, TLMM_GPIO_INTR_CFG(pin), reg); } int qcgpio_intr(void *arg) { struct qcgpio_softc *sc = arg; int pin, handled = 0; uint32_t stat; for (pin = 0; pin < sc->sc_npins; pin++) { if (sc->sc_pin_ih[pin].ih_func == NULL) continue; stat = HREAD4(sc, TLMM_GPIO_INTR_STATUS(pin)); if (stat & TLMM_GPIO_INTR_STATUS_INTR_STATUS) { sc->sc_pin_ih[pin].ih_func(sc->sc_pin_ih[pin].ih_arg); handled = 1; } HWRITE4(sc, TLMM_GPIO_INTR_STATUS(pin), stat & ~TLMM_GPIO_INTR_STATUS_INTR_STATUS); } return handled; }