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4d846d260e
The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
262 lines
6.3 KiB
C
262 lines
6.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2022 Jessica Clarke <jrtc27@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* Dialog Semiconductor DA9063 PMIC, 2-WIRE */
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <dev/dialog/da9063/da9063reg.h>
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#include <dev/fdt/simplebus.h>
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#include <dev/iicbus/iiconf.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include "da9063_if.h"
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#define DA9063_IIC_PAGE_SHIFT 8
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#define DA9063_IIC_PAGE_SIZE (1 << DA9063_IIC_PAGE_SHIFT)
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#define DA9063_IIC_PAGE(_a) ((_a) >> DA9063_IIC_PAGE_SHIFT)
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#define DA9063_IIC_PAGE_OFF(_a) ((_a) & (DA9063_IIC_PAGE_SIZE - 1))
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#define DA9063_IIC_ADDR(_p, _o) (((_p) << DA9063_IIC_PAGE_SHIFT) | (_o))
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/*
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* For 2-WIRE (I2C) operation pages are 256 registers but PAGE_CON is in units
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* of 128 registers with the LSB ignored so scale the page when writing to it.
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*/
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#define DA9063_IIC_PAGE_CON_REG_PAGE_SHIFT 1
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struct da9063_iic_softc {
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struct simplebus_softc simplebus_sc;
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device_t dev;
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struct mtx mtx;
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uint8_t page;
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};
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#define DA9063_IIC_LOCK(sc) mtx_lock(&(sc)->mtx)
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#define DA9063_IIC_UNLOCK(sc) mtx_unlock(&(sc)->mtx)
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#define DA9063_IIC_ASSERT_LOCKED(sc) mtx_assert(&(sc)->mtx, MA_OWNED);
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#define DA9063_IIC_ASSERT_UNLOCKED(sc) mtx_assert(&(sc)->mtx, MA_NOTOWNED);
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static struct ofw_compat_data compat_data[] = {
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{ "dlg,da9063", 1 },
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{ NULL, 0 }
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};
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static int
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da9063_iic_select_page(struct da9063_iic_softc *sc, uint16_t page)
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{
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uint8_t reg;
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int error;
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DA9063_IIC_ASSERT_LOCKED(sc);
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if (page == sc->page)
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return (0);
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error = iicdev_readfrom(sc->dev, DA9063_PAGE_CON, ®, 1, IIC_WAIT);
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if (error != 0)
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return (iic2errno(error));
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reg &= ~(DA9063_PAGE_CON_REG_PAGE_MASK <<
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DA9063_PAGE_CON_REG_PAGE_SHIFT);
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reg |= (page << DA9063_IIC_PAGE_CON_REG_PAGE_SHIFT) <<
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DA9063_PAGE_CON_REG_PAGE_SHIFT;
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error = iicdev_writeto(sc->dev, DA9063_PAGE_CON, ®, 1, IIC_WAIT);
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if (error != 0)
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return (iic2errno(error));
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sc->page = page;
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return (0);
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}
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static int
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da9063_iic_read(device_t dev, uint16_t addr, uint8_t *val)
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{
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struct da9063_iic_softc *sc;
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int error;
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sc = device_get_softc(dev);
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DA9063_IIC_LOCK(sc);
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error = da9063_iic_select_page(sc, DA9063_IIC_PAGE(addr));
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if (error != 0)
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goto error;
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error = iicdev_readfrom(dev, DA9063_IIC_PAGE_OFF(addr), val, 1,
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IIC_WAIT);
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if (error != 0)
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error = iic2errno(error);
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error:
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DA9063_IIC_UNLOCK(sc);
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return (error);
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}
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static int
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da9063_iic_write(device_t dev, uint16_t addr, uint8_t val)
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{
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struct da9063_iic_softc *sc;
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int error;
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sc = device_get_softc(dev);
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DA9063_IIC_LOCK(sc);
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error = da9063_iic_select_page(sc, DA9063_IIC_PAGE(addr));
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if (error != 0)
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goto error;
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error = iicdev_writeto(dev, DA9063_IIC_PAGE_OFF(addr), &val, 1,
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IIC_WAIT);
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if (error != 0)
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error = iic2errno(error);
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error:
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DA9063_IIC_UNLOCK(sc);
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return (error);
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}
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static int
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da9063_iic_modify(device_t dev, uint16_t addr, uint8_t clear_mask,
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uint8_t set_mask)
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{
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struct da9063_iic_softc *sc;
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uint8_t reg;
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int error;
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sc = device_get_softc(dev);
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DA9063_IIC_LOCK(sc);
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error = da9063_iic_select_page(sc, DA9063_IIC_PAGE(addr));
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if (error != 0)
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goto error;
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error = iicdev_readfrom(dev, DA9063_IIC_PAGE_OFF(addr), ®, 1,
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IIC_WAIT);
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if (error != 0) {
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error = iic2errno(error);
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goto error;
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}
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reg &= ~clear_mask;
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reg |= set_mask;
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error = iicdev_writeto(dev, DA9063_IIC_PAGE_OFF(addr), ®, 1,
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IIC_WAIT);
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if (error != 0)
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error = iic2errno(error);
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error:
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DA9063_IIC_UNLOCK(sc);
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return (error);
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}
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static int
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da9063_iic_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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device_set_desc(dev, "Dialog DA9063 PMIC");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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da9063_iic_attach(device_t dev)
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{
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struct da9063_iic_softc *sc;
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uint8_t reg;
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int error;
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sc = device_get_softc(dev);
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sc->dev = dev;
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error = iicdev_readfrom(dev, DA9063_PAGE_CON, ®, 1, IIC_WAIT);
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if (error != 0)
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return (iic2errno(error));
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sc->page = ((reg >> DA9063_PAGE_CON_REG_PAGE_SHIFT) &
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DA9063_PAGE_CON_REG_PAGE_MASK) >> DA9063_IIC_PAGE_CON_REG_PAGE_SHIFT;
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mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF);
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sc->simplebus_sc.flags |= SB_FLAG_NO_RANGES;
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return (simplebus_attach(dev));
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}
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static int
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da9063_iic_detach(device_t dev)
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{
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struct da9063_iic_softc *sc;
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int error;
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sc = device_get_softc(dev);
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error = simplebus_detach(dev);
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if (error != 0)
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return (error);
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mtx_destroy(&sc->mtx);
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return (0);
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}
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static device_method_t da9063_iic_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, da9063_iic_probe),
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DEVMETHOD(device_attach, da9063_iic_attach),
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DEVMETHOD(device_detach, da9063_iic_detach),
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/* DA9063 interface */
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DEVMETHOD(da9063_read, da9063_iic_read),
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DEVMETHOD(da9063_write, da9063_iic_write),
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DEVMETHOD(da9063_modify, da9063_iic_modify),
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DEVMETHOD_END
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};
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DEFINE_CLASS_1(da9063_pmic, da9063_iic_driver, da9063_iic_methods,
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sizeof(struct da9063_iic_softc), simplebus_driver);
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DRIVER_MODULE(da9063_iic, iicbus, da9063_iic_driver, NULL, NULL);
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