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
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2022 Jessica Clarke <jrtc27@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.
|
|
*/
|
|
|
|
/* Dialog Semiconductor DA9063 PMIC, 2-WIRE */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/module.h>
|
|
#include <sys/mutex.h>
|
|
|
|
#include <dev/dialog/da9063/da9063reg.h>
|
|
#include <dev/fdt/simplebus.h>
|
|
#include <dev/iicbus/iiconf.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#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);
|