From: kettenis Date: Wed, 8 Jun 2022 08:40:53 +0000 (+0000) Subject: Add stfpinctrl(4), a driver for the pinctrl/gpio block found on the X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=eae2b48518dddbb2cddadd9ebedaace8e9e5aada;p=openbsd Add stfpinctrl(4), a driver for the pinctrl/gpio block found on the StarFive JH7100 SoC. ok jsg@ --- diff --git a/sys/arch/riscv64/conf/files.riscv64 b/sys/arch/riscv64/conf/files.riscv64 index a5d64c75d37..9d93d79b6b3 100644 --- a/sys/arch/riscv64/conf/files.riscv64 +++ b/sys/arch/riscv64/conf/files.riscv64 @@ -1,4 +1,4 @@ -# $OpenBSD: files.riscv64,v 1.22 2022/06/06 14:57:33 kettenis Exp $ +# $OpenBSD: files.riscv64,v 1.23 2022/06/08 08:40:53 kettenis Exp $ # Standard stanzas config(8) can't run without maxpartitions 16 @@ -124,6 +124,11 @@ device stfclock attach stfclock at fdt file arch/riscv64/dev/stfclock.c stfclock +# StarFive pinctrl +device stfpinctrl +attach stfpinctrl at fdt +file arch/riscv64/dev/stfpinctrl.c stfpinctrl + # Paravirtual device bus and virtio include "dev/pv/files.pv" diff --git a/sys/arch/riscv64/dev/stfpinctrl.c b/sys/arch/riscv64/dev/stfpinctrl.c new file mode 100644 index 00000000000..fb1090189e0 --- /dev/null +++ b/sys/arch/riscv64/dev/stfpinctrl.c @@ -0,0 +1,201 @@ +/* $OpenBSD: stfpinctrl.c,v 1.1 2022/06/08 08:40:53 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 + +#include +#include +#include + +/* Registers. */ + +#define GPIODIN(pin) (0x0048 + (((pin) / 32) * 4)) +#define GPIO_DOUT_CFG(pin) (0x0050 + ((pin) * 8)) +#define GPIO_DOEN_CFG(pin) (0x0054 + ((pin) * 8)) +#define GPO_ENABLE 0 +#define GPO_DISABLE 1 + +#define PAD_GPIO(pin) (0x0000 + (((pin) / 2) * 4)) +#define PAD_INPUT_ENABLE (1 << 7) +#define PAD_INPUT_SCHMITT_ENABLE (1 << 6) +#define PAD_SHIFT(pin) ((pin % 2) * 16) +#define PAD_FUNC_SHARE(pin) (0x0080 + (((pin) / 2) * 4)) +#define IO_PADSHARE_SEL 0x01a0 + +#define GPIO_NUM_PINS 64 + +struct stfpinctrl_softc { + struct device sc_dev; + bus_space_tag_t sc_iot; + bus_space_handle_t sc_gpio_ioh; + bus_space_handle_t sc_padctl_ioh; + bus_size_t sc_padctl_gpio; + int sc_node; + + struct gpio_controller sc_gc; +}; + +int stfpinctrl_match(struct device *, void *, void *); +void stfpinctrl_attach(struct device *, struct device *, void *); + +const struct cfattach stfpinctrl_ca = { + sizeof (struct stfpinctrl_softc), stfpinctrl_match, stfpinctrl_attach +}; + +struct cfdriver stfpinctrl_cd = { + NULL, "stfpinctrl", DV_DULL +}; + +void stfpinctrl_config_pin(void *, uint32_t *, int); +int stfpinctrl_get_pin(void *, uint32_t *); +void stfpinctrl_set_pin(void *, uint32_t *, int); + +int +stfpinctrl_match(struct device *parent, void *match, void *aux) +{ + struct fdt_attach_args *faa = aux; + + return OF_is_compatible(faa->fa_node, "starfive,jh7100-pinctrl"); +} + +void +stfpinctrl_attach(struct device *parent, struct device *self, void *aux) +{ + struct stfpinctrl_softc *sc = (struct stfpinctrl_softc *)self; + struct fdt_attach_args *faa = aux; + uint32_t sel; + + if (faa->fa_nreg < 1) { + printf(": no registers\n"); + return; + } + + 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_gpio_ioh)) { + printf(": can't map registers\n"); + return; + } + if (bus_space_map(sc->sc_iot, faa->fa_reg[1].addr, + faa->fa_reg[1].size, 0, &sc->sc_padctl_ioh)) { + bus_space_unmap(sc->sc_iot, sc->sc_gpio_ioh, + faa->fa_reg[0].size); + printf(": can't map registers\n"); + return; + } + + printf("\n"); + + sel = bus_space_read_4(sc->sc_iot, sc->sc_padctl_ioh, IO_PADSHARE_SEL); + switch (sel) { + case 0: + default: + /* No GPIOs availavle. */ + return; + case 1: + sc->sc_padctl_gpio = PAD_GPIO(0); + break; + case 2: + sc->sc_padctl_gpio = PAD_FUNC_SHARE(72); + break; + case 3: + sc->sc_padctl_gpio = PAD_FUNC_SHARE(70); + break; + case 4: + case 5: + case 6: + sc->sc_padctl_gpio = PAD_FUNC_SHARE(0); + break; + } + + sc->sc_gc.gc_node = faa->fa_node; + sc->sc_gc.gc_cookie = sc; + sc->sc_gc.gc_config_pin = stfpinctrl_config_pin; + sc->sc_gc.gc_get_pin = stfpinctrl_get_pin; + sc->sc_gc.gc_set_pin = stfpinctrl_set_pin; + gpio_controller_register(&sc->sc_gc); +} + +void +stfpinctrl_config_pin(void *cookie, uint32_t *cells, int config) +{ + struct stfpinctrl_softc *sc = cookie; + uint32_t pin = cells[0]; + uint32_t reg; + + if (pin >= GPIO_NUM_PINS) + return; + + if (config & GPIO_CONFIG_OUTPUT) { + bus_space_write_4(sc->sc_iot, sc->sc_gpio_ioh, + GPIO_DOEN_CFG(pin), GPO_ENABLE); + } else { + reg = bus_space_read_4(sc->sc_iot, sc->sc_padctl_ioh, + sc->sc_padctl_gpio + PAD_GPIO(pin)); + reg |= (PAD_INPUT_ENABLE << PAD_SHIFT(pin)); + reg |= (PAD_INPUT_SCHMITT_ENABLE << PAD_SHIFT(pin)); + bus_space_write_4(sc->sc_iot, sc->sc_padctl_ioh, + sc->sc_padctl_gpio + PAD_GPIO(pin), reg); + bus_space_write_4(sc->sc_iot, sc->sc_gpio_ioh, + GPIO_DOEN_CFG(pin), GPO_DISABLE); + } +} + +int +stfpinctrl_get_pin(void *cookie, uint32_t *cells) +{ + struct stfpinctrl_softc *sc = cookie; + uint32_t pin = cells[0]; + uint32_t flags = cells[1]; + uint32_t reg; + int val; + + if (pin >= GPIO_NUM_PINS) + return 0; + + reg = bus_space_read_4(sc->sc_iot, sc->sc_gpio_ioh, GPIODIN(pin)); + val = (reg >> (pin % 32)) & 1; + if (flags & GPIO_ACTIVE_LOW) + val = !val; + return val; +} + +void +stfpinctrl_set_pin(void *cookie, uint32_t *cells, int val) +{ + struct stfpinctrl_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; + bus_space_write_4(sc->sc_iot, sc->sc_gpio_ioh, + GPIO_DOUT_CFG(pin), val); +}