/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2022 Jessica Clarke * * 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. */ /* Dialog Semiconductor DA9063 PMIC, 2-WIRE */ #include #include #include #include #include #include #include #include #include #include #include "da9063_if.h" #define DA9063_IIC_PAGE_SHIFT 8 #define DA9063_IIC_PAGE_SIZE (1 << DA9063_IIC_PAGE_SHIFT) #define DA9063_IIC_PAGE(_a) ((_a) >> DA9063_IIC_PAGE_SHIFT) #define DA9063_IIC_PAGE_OFF(_a) ((_a) & (DA9063_IIC_PAGE_SIZE - 1)) #define DA9063_IIC_ADDR(_p, _o) (((_p) << DA9063_IIC_PAGE_SHIFT) | (_o)) /* * For 2-WIRE (I2C) operation pages are 256 registers but PAGE_CON is in units * of 128 registers with the LSB ignored so scale the page when writing to it. */ #define DA9063_IIC_PAGE_CON_REG_PAGE_SHIFT 1 struct da9063_iic_softc { struct simplebus_softc simplebus_sc; device_t dev; struct mtx mtx; uint8_t page; }; #define DA9063_IIC_LOCK(sc) mtx_lock(&(sc)->mtx) #define DA9063_IIC_UNLOCK(sc) mtx_unlock(&(sc)->mtx) #define DA9063_IIC_ASSERT_LOCKED(sc) mtx_assert(&(sc)->mtx, MA_OWNED); #define DA9063_IIC_ASSERT_UNLOCKED(sc) mtx_assert(&(sc)->mtx, MA_NOTOWNED); static struct ofw_compat_data compat_data[] = { { "dlg,da9063", 1 }, { NULL, 0 } }; static int da9063_iic_select_page(struct da9063_iic_softc *sc, uint16_t page) { uint8_t reg; int error; DA9063_IIC_ASSERT_LOCKED(sc); if (page == sc->page) return (0); error = iicdev_readfrom(sc->dev, DA9063_PAGE_CON, ®, 1, IIC_WAIT); if (error != 0) return (iic2errno(error)); reg &= ~(DA9063_PAGE_CON_REG_PAGE_MASK << DA9063_PAGE_CON_REG_PAGE_SHIFT); reg |= (page << DA9063_IIC_PAGE_CON_REG_PAGE_SHIFT) << DA9063_PAGE_CON_REG_PAGE_SHIFT; error = iicdev_writeto(sc->dev, DA9063_PAGE_CON, ®, 1, IIC_WAIT); if (error != 0) return (iic2errno(error)); sc->page = page; return (0); } static int da9063_iic_read(device_t dev, uint16_t addr, uint8_t *val) { struct da9063_iic_softc *sc; int error; sc = device_get_softc(dev); DA9063_IIC_LOCK(sc); error = da9063_iic_select_page(sc, DA9063_IIC_PAGE(addr)); if (error != 0) goto error; error = iicdev_readfrom(dev, DA9063_IIC_PAGE_OFF(addr), val, 1, IIC_WAIT); if (error != 0) error = iic2errno(error); error: DA9063_IIC_UNLOCK(sc); return (error); } static int da9063_iic_write(device_t dev, uint16_t addr, uint8_t val) { struct da9063_iic_softc *sc; int error; sc = device_get_softc(dev); DA9063_IIC_LOCK(sc); error = da9063_iic_select_page(sc, DA9063_IIC_PAGE(addr)); if (error != 0) goto error; error = iicdev_writeto(dev, DA9063_IIC_PAGE_OFF(addr), &val, 1, IIC_WAIT); if (error != 0) error = iic2errno(error); error: DA9063_IIC_UNLOCK(sc); return (error); } static int da9063_iic_modify(device_t dev, uint16_t addr, uint8_t clear_mask, uint8_t set_mask) { struct da9063_iic_softc *sc; uint8_t reg; int error; sc = device_get_softc(dev); DA9063_IIC_LOCK(sc); error = da9063_iic_select_page(sc, DA9063_IIC_PAGE(addr)); if (error != 0) goto error; error = iicdev_readfrom(dev, DA9063_IIC_PAGE_OFF(addr), ®, 1, IIC_WAIT); if (error != 0) { error = iic2errno(error); goto error; } reg &= ~clear_mask; reg |= set_mask; error = iicdev_writeto(dev, DA9063_IIC_PAGE_OFF(addr), ®, 1, IIC_WAIT); if (error != 0) error = iic2errno(error); error: DA9063_IIC_UNLOCK(sc); return (error); } static int da9063_iic_probe(device_t dev) { if (!ofw_bus_status_okay(dev)) return (ENXIO); if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) return (ENXIO); device_set_desc(dev, "Dialog DA9063 PMIC"); return (BUS_PROBE_DEFAULT); } static int da9063_iic_attach(device_t dev) { struct da9063_iic_softc *sc; uint8_t reg; int error; sc = device_get_softc(dev); sc->dev = dev; error = iicdev_readfrom(dev, DA9063_PAGE_CON, ®, 1, IIC_WAIT); if (error != 0) return (iic2errno(error)); sc->page = ((reg >> DA9063_PAGE_CON_REG_PAGE_SHIFT) & DA9063_PAGE_CON_REG_PAGE_MASK) >> DA9063_IIC_PAGE_CON_REG_PAGE_SHIFT; mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF); sc->simplebus_sc.flags |= SB_FLAG_NO_RANGES; return (simplebus_attach(dev)); } static int da9063_iic_detach(device_t dev) { struct da9063_iic_softc *sc; int error; sc = device_get_softc(dev); error = simplebus_detach(dev); if (error != 0) return (error); mtx_destroy(&sc->mtx); return (0); } static device_method_t da9063_iic_methods[] = { /* Device interface */ DEVMETHOD(device_probe, da9063_iic_probe), DEVMETHOD(device_attach, da9063_iic_attach), DEVMETHOD(device_detach, da9063_iic_detach), /* DA9063 interface */ DEVMETHOD(da9063_read, da9063_iic_read), DEVMETHOD(da9063_write, da9063_iic_write), DEVMETHOD(da9063_modify, da9063_iic_modify), DEVMETHOD_END }; DEFINE_CLASS_1(da9063_pmic, da9063_iic_driver, da9063_iic_methods, sizeof(struct da9063_iic_softc), simplebus_driver); DRIVER_MODULE(da9063_iic, iicbus, da9063_iic_driver, NULL, NULL);