2016-03-16 13:01:48 +00:00
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/*-
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* Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
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* All rights reserved.
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* AS3722 PMIC driver
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/gpio.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <sys/sx.h>
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#include <machine/bus.h>
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#include <dev/extres/regulator/regulator.h>
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#include <dev/fdt/fdt_pinctrl.h>
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#include <dev/gpio/gpiobusvar.h>
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#include <dev/iicbus/iiconf.h>
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#include <dev/iicbus/iicbus.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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2021-01-15 13:17:03 +00:00
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#include <dt-bindings/mfd/as3722.h>
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2016-03-16 13:01:48 +00:00
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#include "clock_if.h"
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#include "regdev_if.h"
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#include "as3722.h"
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static struct ofw_compat_data compat_data[] = {
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{"ams,as3722", 1},
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{NULL, 0},
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};
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#define LOCK(_sc) sx_xlock(&(_sc)->lock)
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#define UNLOCK(_sc) sx_xunlock(&(_sc)->lock)
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#define LOCK_INIT(_sc) sx_init(&(_sc)->lock, "as3722")
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#define LOCK_DESTROY(_sc) sx_destroy(&(_sc)->lock);
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#define ASSERT_LOCKED(_sc) sx_assert(&(_sc)->lock, SA_XLOCKED);
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#define ASSERT_UNLOCKED(_sc) sx_assert(&(_sc)->lock, SA_UNLOCKED);
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#define AS3722_DEVICE_ID 0x0C
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/*
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* Raw register access function.
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*/
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int
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as3722_read(struct as3722_softc *sc, uint8_t reg, uint8_t *val)
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{
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uint8_t addr;
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int rv;
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struct iic_msg msgs[2] = {
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{0, IIC_M_WR, 1, &addr},
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{0, IIC_M_RD, 1, val},
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};
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msgs[0].slave = sc->bus_addr;
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msgs[1].slave = sc->bus_addr;
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addr = reg;
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rv = iicbus_transfer(sc->dev, msgs, 2);
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if (rv != 0) {
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device_printf(sc->dev,
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"Error when reading reg 0x%02X, rv: %d\n", reg, rv);
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return (EIO);
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}
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return (0);
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}
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int as3722_read_buf(struct as3722_softc *sc, uint8_t reg, uint8_t *buf,
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size_t size)
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{
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uint8_t addr;
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int rv;
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struct iic_msg msgs[2] = {
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{0, IIC_M_WR, 1, &addr},
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{0, IIC_M_RD, size, buf},
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};
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msgs[0].slave = sc->bus_addr;
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msgs[1].slave = sc->bus_addr;
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addr = reg;
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rv = iicbus_transfer(sc->dev, msgs, 2);
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if (rv != 0) {
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device_printf(sc->dev,
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"Error when reading reg 0x%02X, rv: %d\n", reg, rv);
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return (EIO);
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}
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return (0);
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}
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int
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as3722_write(struct as3722_softc *sc, uint8_t reg, uint8_t val)
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{
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uint8_t data[2];
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int rv;
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struct iic_msg msgs[1] = {
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{0, IIC_M_WR, 2, data},
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};
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msgs[0].slave = sc->bus_addr;
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data[0] = reg;
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data[1] = val;
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rv = iicbus_transfer(sc->dev, msgs, 1);
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if (rv != 0) {
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device_printf(sc->dev,
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"Error when writing reg 0x%02X, rv: %d\n", reg, rv);
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return (EIO);
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}
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return (0);
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}
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int as3722_write_buf(struct as3722_softc *sc, uint8_t reg, uint8_t *buf,
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size_t size)
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{
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uint8_t data[1];
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int rv;
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struct iic_msg msgs[2] = {
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{0, IIC_M_WR, 1, data},
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{0, IIC_M_WR | IIC_M_NOSTART, size, buf},
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};
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msgs[0].slave = sc->bus_addr;
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msgs[1].slave = sc->bus_addr;
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data[0] = reg;
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rv = iicbus_transfer(sc->dev, msgs, 2);
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if (rv != 0) {
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device_printf(sc->dev,
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"Error when writing reg 0x%02X, rv: %d\n", reg, rv);
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return (EIO);
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}
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return (0);
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}
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int
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as3722_modify(struct as3722_softc *sc, uint8_t reg, uint8_t clear, uint8_t set)
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{
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uint8_t val;
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int rv;
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rv = as3722_read(sc, reg, &val);
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if (rv != 0)
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return (rv);
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val &= ~clear;
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val |= set;
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rv = as3722_write(sc, reg, val);
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if (rv != 0)
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return (rv);
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return (0);
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}
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static int
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as3722_get_version(struct as3722_softc *sc)
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{
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uint8_t reg;
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int rv;
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/* Verify AS3722 ID and version. */
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rv = RD1(sc, AS3722_ASIC_ID1, ®);
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if (rv != 0)
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return (ENXIO);
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if (reg != AS3722_DEVICE_ID) {
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device_printf(sc->dev, "Invalid chip ID is 0x%x\n", reg);
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return (ENXIO);
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}
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rv = RD1(sc, AS3722_ASIC_ID2, &sc->chip_rev);
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if (rv != 0)
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return (ENXIO);
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if (bootverbose)
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device_printf(sc->dev, "AS3722 rev: 0x%x\n", sc->chip_rev);
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return (0);
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}
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static int
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as3722_init(struct as3722_softc *sc)
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{
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uint32_t reg;
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int rv;
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reg = 0;
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if (sc->int_pullup)
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reg |= AS3722_INT_PULL_UP;
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if (sc->i2c_pullup)
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reg |= AS3722_I2C_PULL_UP;
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rv = RM1(sc, AS3722_IO_VOLTAGE,
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AS3722_INT_PULL_UP | AS3722_I2C_PULL_UP, reg);
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if (rv != 0)
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return (ENXIO);
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/* mask interrupts */
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rv = WR1(sc, AS3722_INTERRUPT_MASK1, 0);
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if (rv != 0)
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return (ENXIO);
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rv = WR1(sc, AS3722_INTERRUPT_MASK2, 0);
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if (rv != 0)
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return (ENXIO);
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rv = WR1(sc, AS3722_INTERRUPT_MASK3, 0);
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if (rv != 0)
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return (ENXIO);
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rv = WR1(sc, AS3722_INTERRUPT_MASK4, 0);
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if (rv != 0)
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return (ENXIO);
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return (0);
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}
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static int
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as3722_parse_fdt(struct as3722_softc *sc, phandle_t node)
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{
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sc->int_pullup =
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OF_hasprop(node, "ams,enable-internal-int-pullup") ? 1 : 0;
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sc->i2c_pullup =
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OF_hasprop(node, "ams,enable-internal-i2c-pullup") ? 1 : 0;
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return 0;
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}
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static void
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as3722_intr(void *arg)
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{
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/* XXX Finish temperature alarms. */
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}
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static int
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as3722_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)
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return (ENXIO);
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device_set_desc(dev, "AS3722 PMIC");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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as3722_attach(device_t dev)
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{
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struct as3722_softc *sc;
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2022-04-09 01:31:29 +00:00
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int rv, rid;
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2016-03-16 13:01:48 +00:00
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phandle_t node;
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sc = device_get_softc(dev);
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sc->dev = dev;
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sc->bus_addr = iicbus_get_addr(dev);
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node = ofw_bus_get_node(sc->dev);
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rv = 0;
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LOCK_INIT(sc);
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rid = 0;
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sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_ACTIVE);
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if (sc->irq_res == NULL) {
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device_printf(dev, "Cannot allocate interrupt.\n");
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rv = ENXIO;
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goto fail;
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}
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rv = as3722_parse_fdt(sc, node);
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if (rv != 0)
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goto fail;
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rv = as3722_get_version(sc);
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if (rv != 0)
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goto fail;
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rv = as3722_init(sc);
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if (rv != 0)
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goto fail;
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rv = as3722_regulator_attach(sc, node);
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if (rv != 0)
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goto fail;
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rv = as3722_gpio_attach(sc, node);
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if (rv != 0)
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goto fail;
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rv = as3722_rtc_attach(sc, node);
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if (rv != 0)
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goto fail;
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fdt_pinctrl_register(dev, NULL);
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fdt_pinctrl_configure_by_name(dev, "default");
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/* Setup interrupt. */
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rv = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
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NULL, as3722_intr, sc, &sc->irq_h);
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if (rv) {
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device_printf(dev, "Cannot setup interrupt.\n");
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goto fail;
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}
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return (bus_generic_attach(dev));
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fail:
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if (sc->irq_h != NULL)
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bus_teardown_intr(dev, sc->irq_res, sc->irq_h);
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if (sc->irq_res != NULL)
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bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
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LOCK_DESTROY(sc);
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return (rv);
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}
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static int
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as3722_detach(device_t dev)
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{
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struct as3722_softc *sc;
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sc = device_get_softc(dev);
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if (sc->irq_h != NULL)
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bus_teardown_intr(dev, sc->irq_res, sc->irq_h);
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if (sc->irq_res != NULL)
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bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
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LOCK_DESTROY(sc);
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return (bus_generic_detach(dev));
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}
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static phandle_t
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as3722_gpio_get_node(device_t bus, device_t dev)
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{
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/* We only have one child, the GPIO bus, which needs our own node. */
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return (ofw_bus_get_node(bus));
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}
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static device_method_t as3722_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, as3722_probe),
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DEVMETHOD(device_attach, as3722_attach),
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DEVMETHOD(device_detach, as3722_detach),
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/* Regdev interface */
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DEVMETHOD(regdev_map, as3722_regulator_map),
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/* RTC interface */
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DEVMETHOD(clock_gettime, as3722_rtc_gettime),
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DEVMETHOD(clock_settime, as3722_rtc_settime),
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/* GPIO protocol interface */
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DEVMETHOD(gpio_get_bus, as3722_gpio_get_bus),
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DEVMETHOD(gpio_pin_max, as3722_gpio_pin_max),
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DEVMETHOD(gpio_pin_getname, as3722_gpio_pin_getname),
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DEVMETHOD(gpio_pin_getflags, as3722_gpio_pin_getflags),
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DEVMETHOD(gpio_pin_getcaps, as3722_gpio_pin_getcaps),
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DEVMETHOD(gpio_pin_setflags, as3722_gpio_pin_setflags),
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DEVMETHOD(gpio_pin_get, as3722_gpio_pin_get),
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DEVMETHOD(gpio_pin_set, as3722_gpio_pin_set),
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DEVMETHOD(gpio_pin_toggle, as3722_gpio_pin_toggle),
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DEVMETHOD(gpio_map_gpios, as3722_gpio_map_gpios),
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/* fdt_pinctrl interface */
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DEVMETHOD(fdt_pinctrl_configure, as3722_pinmux_configure),
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/* ofw_bus interface */
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DEVMETHOD(ofw_bus_get_node, as3722_gpio_get_node),
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DEVMETHOD_END
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};
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2016-09-30 05:25:15 +00:00
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static DEFINE_CLASS_0(gpio, as3722_driver, as3722_methods,
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2016-03-16 13:01:48 +00:00
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sizeof(struct as3722_softc));
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2022-05-09 21:26:45 +00:00
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EARLY_DRIVER_MODULE(as3722, iicbus, as3722_driver, NULL, NULL, 74);
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