diff options
Diffstat (limited to 'sys/riscv/cvitek')
| -rw-r--r-- | sys/riscv/cvitek/cvitek_reset.c | 132 | ||||
| -rw-r--r-- | sys/riscv/cvitek/cvitek_restart.c | 158 | ||||
| -rw-r--r-- | sys/riscv/cvitek/files.cvitek | 4 |
3 files changed, 294 insertions, 0 deletions
diff --git a/sys/riscv/cvitek/cvitek_reset.c b/sys/riscv/cvitek/cvitek_reset.c new file mode 100644 index 000000000000..348bbc85c9a9 --- /dev/null +++ b/sys/riscv/cvitek/cvitek_reset.c @@ -0,0 +1,132 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2025 Bojan Novković <bnovkov@FreeBSD.org + * + * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/module.h> +#include <sys/mutex.h> +#include <sys/rman.h> + +#include <machine/bus.h> +#include <machine/cpu.h> +#include <machine/bus.h> +#include <machine/resource.h> + +#include <dev/hwreset/hwreset.h> +#include <dev/syscon/syscon.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> +#include <dev/ofw/openfirm.h> + +#include "syscon_if.h" +#include "hwreset_if.h" + +struct cvitek_reset_softc { + device_t dev; + struct mtx mtx; + struct syscon *syscon; +}; + +static int +cvitek_reset_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (ofw_bus_is_compatible(dev, "cvitek,reset")) { + device_set_desc(dev, "CVITEK reset controller"); + return (BUS_PROBE_DEFAULT); + } + + return (ENXIO); +} + +static int +cvitek_reset_attach(device_t dev) +{ + struct cvitek_reset_softc *sc; + int error; + + sc = device_get_softc(dev); + sc->dev = dev; + + error = syscon_get_by_ofw_property(dev, ofw_bus_get_node(dev), + "syscon", &sc->syscon); + if (error != 0) { + device_printf(dev, "Couldn't get syscon handle\n"); + return (error); + } + mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF); + + hwreset_register_ofw_provider(dev); + + return (0); +} + +static int +cvitek_reset_assert(device_t dev, intptr_t id, bool reset) +{ + struct cvitek_reset_softc *sc; + uint32_t offset, val; + uint32_t bit; + + sc = device_get_softc(dev); + bit = id % 32; + offset = id / 32; + + mtx_lock(&sc->mtx); + val = SYSCON_READ_4(sc->syscon, offset); + if (reset) + val &= ~(1 << bit); + else + val |= (1 << bit); + SYSCON_WRITE_4(sc->syscon, offset, val); + mtx_unlock(&sc->mtx); + + return (0); +} + +static device_method_t cvitek_reset_methods[] = { + DEVMETHOD(device_probe, cvitek_reset_probe), + DEVMETHOD(device_attach, cvitek_reset_attach), + + DEVMETHOD(hwreset_assert, cvitek_reset_assert), + + DEVMETHOD_END +}; + +static driver_t cvitek_reset_driver = { + "cvitek_reset", + cvitek_reset_methods, + sizeof(struct cvitek_reset_softc) +}; + +DRIVER_MODULE(cvitek_reset, simplebus, cvitek_reset_driver, 0, 0); diff --git a/sys/riscv/cvitek/cvitek_restart.c b/sys/riscv/cvitek/cvitek_restart.c new file mode 100644 index 000000000000..53df126d5171 --- /dev/null +++ b/sys/riscv/cvitek/cvitek_restart.c @@ -0,0 +1,158 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2024 Bojan Novković <bnovkov@FreeBSD.org> + * + * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. + */ + +/* + * Driver for cvitek's poweroff/restart controller. + */ + +#include <sys/param.h> +#include <sys/bus.h> +#include <sys/types.h> +#include <sys/eventhandler.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/reboot.h> +#include <sys/rman.h> + +#include <machine/bus.h> +#include <machine/resource.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> +#include <dev/ofw/openfirm.h> + +#define RTC_CTRL0_UNLOCK 0x4 +#define RTC_CTRL0_UNLOCK_KEY 0xAB18 + +#define RTC_CTRL0 0x8 +#define RTC_CTRL0_RESERVED_MASK 0xFFFF0800 +#define RTC_CTRL0_REQ_SHUTDOWN 0x01 +#define RTC_CTRL0_REQ_POWERCYCLE 0x08 +#define RTC_CTRL0_REQ_WARM_RESET 0x10 + +#define RTC_BASE_OFFSET 0x1000 +#define RTC_EN_SHDN_REQ (RTC_BASE_OFFSET + 0xC0) +#define RTC_EN_PWR_CYC_REQ (RTC_BASE_OFFSET + 0xC8) +#define RTC_EN_WARM_RST_REQ (RTC_BASE_OFFSET + 0xCC) + +struct cvitek_restart_softc { + int reg_rid; + struct resource *reg; + eventhandler_tag tag; +}; + +static void +cvitek_restart_shutdown_final(device_t dev, int howto) +{ + struct cvitek_restart_softc *sc; + uint32_t val; + + sc = device_get_softc(dev); + val = RTC_CTRL0_RESERVED_MASK; + if ((howto & RB_POWEROFF) != 0) + val |= RTC_CTRL0_REQ_SHUTDOWN; + else if ((howto & RB_POWERCYCLE) != 0) + val |= RTC_CTRL0_REQ_POWERCYCLE; + else + val |= RTC_CTRL0_REQ_WARM_RESET; + + /* Unlock writes to 'rtc_ctrl0'. */ + bus_write_4(sc->reg, RTC_CTRL0_UNLOCK, RTC_CTRL0_UNLOCK_KEY); + bus_write_4(sc->reg, RTC_CTRL0, val); + DELAY(1000); + + device_printf(dev, "Poweroff request failed\n"); +} + +static int +cvitek_restart_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (ofw_bus_is_compatible(dev, "cvitek,restart")) { + device_set_desc(dev, "Cvitek restart controller"); + return (BUS_PROBE_DEFAULT); + } + return (ENXIO); +} + +static int +cvitek_restart_attach(device_t dev) +{ + struct cvitek_restart_softc *sc; + + sc = device_get_softc(dev); + sc->reg = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->reg_rid, + RF_ACTIVE); + if (sc->reg == NULL) { + device_printf(dev, "can't map RTC regs\n"); + return (ENXIO); + } + + /* Enable requests for various poweroff methods. */ + bus_write_4(sc->reg, RTC_EN_SHDN_REQ, 0x1); + bus_write_4(sc->reg, RTC_EN_PWR_CYC_REQ, 0x1); + bus_write_4(sc->reg, RTC_EN_WARM_RST_REQ, 0x1); + + sc->tag = EVENTHANDLER_REGISTER(shutdown_final, + cvitek_restart_shutdown_final, dev, SHUTDOWN_PRI_LAST); + + return (0); +} + +static int +cvitek_restart_detach(device_t dev) +{ + struct cvitek_restart_softc *sc; + + sc = device_get_softc(dev); + if (sc->reg == NULL) + return (0); + + bus_write_4(sc->reg, RTC_EN_SHDN_REQ, 0x0); + bus_write_4(sc->reg, RTC_EN_PWR_CYC_REQ, 0x0); + bus_write_4(sc->reg, RTC_EN_WARM_RST_REQ, 0x0); + + bus_release_resource(dev, SYS_RES_MEMORY, sc->reg_rid, sc->reg); + EVENTHANDLER_DEREGISTER(shutdown_final, sc->tag); + + return (0); +} + +static device_method_t cvitek_restart_methods[] = { + DEVMETHOD(device_probe, cvitek_restart_probe), + DEVMETHOD(device_attach, cvitek_restart_attach), + DEVMETHOD(device_detach, cvitek_restart_detach), + + DEVMETHOD_END +}; + +DEFINE_CLASS_0(cvitek_restart, cvitek_restart_driver, cvitek_restart_methods, + sizeof(struct cvitek_restart_softc)); +DRIVER_MODULE(cvitek_restart, simplebus, cvitek_restart_driver, NULL, NULL); diff --git a/sys/riscv/cvitek/files.cvitek b/sys/riscv/cvitek/files.cvitek new file mode 100644 index 000000000000..bf89ee390403 --- /dev/null +++ b/sys/riscv/cvitek/files.cvitek @@ -0,0 +1,4 @@ +riscv/cvitek/cvitek_restart.c optional fdt cvitek_restart +riscv/cvitek/cvitek_reset.c optional fdt cvitek_reset +dev/dwc/if_dwc_cvitek.c optional fdt dwc_cvitek +dev/sdhci/sdhci_fdt_cvitek.c optional fdt sdhci sdhci_cvitek regulator |