412 lines
9.3 KiB
C
412 lines
9.3 KiB
C
|
/*-
|
||
|
|
* Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* 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/cdefs.h>
|
||
|
|
__FBSDID("$FreeBSD$");
|
||
|
|
|
||
|
|
/*
|
||
|
|
* AS3722 PMIC driver
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/param.h>
|
||
|
|
#include <sys/systm.h>
|
||
|
|
#include <sys/bus.h>
|
||
|
|
#include <sys/gpio.h>
|
||
|
|
#include <sys/kernel.h>
|
||
|
|
#include <sys/module.h>
|
||
|
|
#include <sys/malloc.h>
|
||
|
|
#include <sys/rman.h>
|
||
|
|
#include <sys/sx.h>
|
||
|
|
|
||
|
|
#include <machine/bus.h>
|
||
|
|
|
||
|
|
#include <dev/extres/regulator/regulator.h>
|
||
|
|
#include <dev/fdt/fdt_pinctrl.h>
|
||
|
|
#include <dev/gpio/gpiobusvar.h>
|
||
|
|
#include <dev/iicbus/iiconf.h>
|
||
|
|
#include <dev/iicbus/iicbus.h>
|
||
|
|
#include <dev/ofw/ofw_bus.h>
|
||
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
||
|
|
|
||
|
|
#include <gnu/dts/include/dt-bindings/mfd/as3722.h>
|
||
|
|
|
||
|
|
#include "clock_if.h"
|
||
|
|
#include "regdev_if.h"
|
||
|
|
|
||
|
|
#include "as3722.h"
|
||
|
|
|
||
|
|
static struct ofw_compat_data compat_data[] = {
|
||
|
|
{"ams,as3722", 1},
|
||
|
|
{NULL, 0},
|
||
|
|
};
|
||
|
|
|
||
|
|
#define LOCK(_sc) sx_xlock(&(_sc)->lock)
|
||
|
|
#define UNLOCK(_sc) sx_xunlock(&(_sc)->lock)
|
||
|
|
#define LOCK_INIT(_sc) sx_init(&(_sc)->lock, "as3722")
|
||
|
|
#define LOCK_DESTROY(_sc) sx_destroy(&(_sc)->lock);
|
||
|
|
#define ASSERT_LOCKED(_sc) sx_assert(&(_sc)->lock, SA_XLOCKED);
|
||
|
|
#define ASSERT_UNLOCKED(_sc) sx_assert(&(_sc)->lock, SA_UNLOCKED);
|
||
|
|
|
||
|
|
#define AS3722_DEVICE_ID 0x0C
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Raw register access function.
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
as3722_read(struct as3722_softc *sc, uint8_t reg, uint8_t *val)
|
||
|
|
{
|
||
|
|
uint8_t addr;
|
||
|
|
int rv;
|
||
|
|
struct iic_msg msgs[2] = {
|
||
|
|
{0, IIC_M_WR, 1, &addr},
|
||
|
|
{0, IIC_M_RD, 1, val},
|
||
|
|
};
|
||
|
|
|
||
|
|
msgs[0].slave = sc->bus_addr;
|
||
|
|
msgs[1].slave = sc->bus_addr;
|
||
|
|
addr = reg;
|
||
|
|
|
||
|
|
rv = iicbus_transfer(sc->dev, msgs, 2);
|
||
|
|
if (rv != 0) {
|
||
|
|
device_printf(sc->dev,
|
||
|
|
"Error when reading reg 0x%02X, rv: %d\n", reg, rv);
|
||
|
|
return (EIO);
|
||
|
|
}
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
int as3722_read_buf(struct as3722_softc *sc, uint8_t reg, uint8_t *buf,
|
||
|
|
size_t size)
|
||
|
|
{
|
||
|
|
uint8_t addr;
|
||
|
|
int rv;
|
||
|
|
struct iic_msg msgs[2] = {
|
||
|
|
{0, IIC_M_WR, 1, &addr},
|
||
|
|
{0, IIC_M_RD, size, buf},
|
||
|
|
};
|
||
|
|
|
||
|
|
msgs[0].slave = sc->bus_addr;
|
||
|
|
msgs[1].slave = sc->bus_addr;
|
||
|
|
addr = reg;
|
||
|
|
|
||
|
|
rv = iicbus_transfer(sc->dev, msgs, 2);
|
||
|
|
if (rv != 0) {
|
||
|
|
device_printf(sc->dev,
|
||
|
|
"Error when reading reg 0x%02X, rv: %d\n", reg, rv);
|
||
|
|
return (EIO);
|
||
|
|
}
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
as3722_write(struct as3722_softc *sc, uint8_t reg, uint8_t val)
|
||
|
|
{
|
||
|
|
uint8_t data[2];
|
||
|
|
int rv;
|
||
|
|
|
||
|
|
struct iic_msg msgs[1] = {
|
||
|
|
{0, IIC_M_WR, 2, data},
|
||
|
|
};
|
||
|
|
|
||
|
|
msgs[0].slave = sc->bus_addr;
|
||
|
|
data[0] = reg;
|
||
|
|
data[1] = val;
|
||
|
|
|
||
|
|
rv = iicbus_transfer(sc->dev, msgs, 1);
|
||
|
|
if (rv != 0) {
|
||
|
|
device_printf(sc->dev,
|
||
|
|
"Error when writing reg 0x%02X, rv: %d\n", reg, rv);
|
||
|
|
return (EIO);
|
||
|
|
}
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
int as3722_write_buf(struct as3722_softc *sc, uint8_t reg, uint8_t *buf,
|
||
|
|
size_t size)
|
||
|
|
{
|
||
|
|
uint8_t data[1];
|
||
|
|
int rv;
|
||
|
|
struct iic_msg msgs[2] = {
|
||
|
|
{0, IIC_M_WR, 1, data},
|
||
|
|
{0, IIC_M_WR | IIC_M_NOSTART, size, buf},
|
||
|
|
};
|
||
|
|
|
||
|
|
msgs[0].slave = sc->bus_addr;
|
||
|
|
msgs[1].slave = sc->bus_addr;
|
||
|
|
data[0] = reg;
|
||
|
|
|
||
|
|
rv = iicbus_transfer(sc->dev, msgs, 2);
|
||
|
|
if (rv != 0) {
|
||
|
|
device_printf(sc->dev,
|
||
|
|
"Error when writing reg 0x%02X, rv: %d\n", reg, rv);
|
||
|
|
return (EIO);
|
||
|
|
}
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
as3722_modify(struct as3722_softc *sc, uint8_t reg, uint8_t clear, uint8_t set)
|
||
|
|
{
|
||
|
|
uint8_t val;
|
||
|
|
int rv;
|
||
|
|
|
||
|
|
rv = as3722_read(sc, reg, &val);
|
||
|
|
if (rv != 0)
|
||
|
|
return (rv);
|
||
|
|
|
||
|
|
val &= ~clear;
|
||
|
|
val |= set;
|
||
|
|
|
||
|
|
rv = as3722_write(sc, reg, val);
|
||
|
|
if (rv != 0)
|
||
|
|
return (rv);
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
as3722_get_version(struct as3722_softc *sc)
|
||
|
|
{
|
||
|
|
uint8_t reg;
|
||
|
|
int rv;
|
||
|
|
|
||
|
|
/* Verify AS3722 ID and version. */
|
||
|
|
rv = RD1(sc, AS3722_ASIC_ID1, ®);
|
||
|
|
if (rv != 0)
|
||
|
|
return (ENXIO);
|
||
|
|
|
||
|
|
if (reg != AS3722_DEVICE_ID) {
|
||
|
|
device_printf(sc->dev, "Invalid chip ID is 0x%x\n", reg);
|
||
|
|
return (ENXIO);
|
||
|
|
}
|
||
|
|
|
||
|
|
rv = RD1(sc, AS3722_ASIC_ID2, &sc->chip_rev);
|
||
|
|
if (rv != 0)
|
||
|
|
return (ENXIO);
|
||
|
|
|
||
|
|
if (bootverbose)
|
||
|
|
device_printf(sc->dev, "AS3722 rev: 0x%x\n", sc->chip_rev);
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
as3722_init(struct as3722_softc *sc)
|
||
|
|
{
|
||
|
|
uint32_t reg;
|
||
|
|
int rv;
|
||
|
|
|
||
|
|
reg = 0;
|
||
|
|
if (sc->int_pullup)
|
||
|
|
reg |= AS3722_INT_PULL_UP;
|
||
|
|
if (sc->i2c_pullup)
|
||
|
|
reg |= AS3722_I2C_PULL_UP;
|
||
|
|
|
||
|
|
rv = RM1(sc, AS3722_IO_VOLTAGE,
|
||
|
|
AS3722_INT_PULL_UP | AS3722_I2C_PULL_UP, reg);
|
||
|
|
if (rv != 0)
|
||
|
|
return (ENXIO);
|
||
|
|
|
||
|
|
/* mask interrupts */
|
||
|
|
rv = WR1(sc, AS3722_INTERRUPT_MASK1, 0);
|
||
|
|
if (rv != 0)
|
||
|
|
return (ENXIO);
|
||
|
|
rv = WR1(sc, AS3722_INTERRUPT_MASK2, 0);
|
||
|
|
if (rv != 0)
|
||
|
|
return (ENXIO);
|
||
|
|
rv = WR1(sc, AS3722_INTERRUPT_MASK3, 0);
|
||
|
|
if (rv != 0)
|
||
|
|
return (ENXIO);
|
||
|
|
rv = WR1(sc, AS3722_INTERRUPT_MASK4, 0);
|
||
|
|
if (rv != 0)
|
||
|
|
return (ENXIO);
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
as3722_parse_fdt(struct as3722_softc *sc, phandle_t node)
|
||
|
|
{
|
||
|
|
|
||
|
|
sc->int_pullup =
|
||
|
|
OF_hasprop(node, "ams,enable-internal-int-pullup") ? 1 : 0;
|
||
|
|
sc->i2c_pullup =
|
||
|
|
OF_hasprop(node, "ams,enable-internal-i2c-pullup") ? 1 : 0;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
as3722_intr(void *arg)
|
||
|
|
{
|
||
|
|
struct as3722_softc *sc;
|
||
|
|
|
||
|
|
sc = (struct as3722_softc *)arg;
|
||
|
|
/* XXX Finish temperature alarms. */
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
as3722_probe(device_t dev)
|
||
|
|
{
|
||
|
|
|
||
|
|
if (!ofw_bus_status_okay(dev))
|
||
|
|
return (ENXIO);
|
||
|
|
|
||
|
|
if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
|
||
|
|
return (ENXIO);
|
||
|
|
|
||
|
|
device_set_desc(dev, "AS3722 PMIC");
|
||
|
|
return (BUS_PROBE_DEFAULT);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
as3722_attach(device_t dev)
|
||
|
|
{
|
||
|
|
struct as3722_softc *sc;
|
||
|
|
const char *dname;
|
||
|
|
int dunit, rv, rid;
|
||
|
|
phandle_t node;
|
||
|
|
|
||
|
|
sc = device_get_softc(dev);
|
||
|
|
sc->dev = dev;
|
||
|
|
sc->bus_addr = iicbus_get_addr(dev);
|
||
|
|
node = ofw_bus_get_node(sc->dev);
|
||
|
|
dname = device_get_name(dev);
|
||
|
|
dunit = device_get_unit(dev);
|
||
|
|
rv = 0;
|
||
|
|
LOCK_INIT(sc);
|
||
|
|
|
||
|
|
rid = 0;
|
||
|
|
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
|
||
|
|
RF_ACTIVE);
|
||
|
|
if (sc->irq_res == NULL) {
|
||
|
|
device_printf(dev, "Cannot allocate interrupt.\n");
|
||
|
|
rv = ENXIO;
|
||
|
|
goto fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
rv = as3722_parse_fdt(sc, node);
|
||
|
|
if (rv != 0)
|
||
|
|
goto fail;
|
||
|
|
rv = as3722_get_version(sc);
|
||
|
|
if (rv != 0)
|
||
|
|
goto fail;
|
||
|
|
rv = as3722_init(sc);
|
||
|
|
if (rv != 0)
|
||
|
|
goto fail;
|
||
|
|
rv = as3722_regulator_attach(sc, node);
|
||
|
|
if (rv != 0)
|
||
|
|
goto fail;
|
||
|
|
rv = as3722_gpio_attach(sc, node);
|
||
|
|
if (rv != 0)
|
||
|
|
goto fail;
|
||
|
|
rv = as3722_rtc_attach(sc, node);
|
||
|
|
if (rv != 0)
|
||
|
|
goto fail;
|
||
|
|
|
||
|
|
fdt_pinctrl_register(dev, NULL);
|
||
|
|
fdt_pinctrl_configure_by_name(dev, "default");
|
||
|
|
|
||
|
|
/* Setup interrupt. */
|
||
|
|
rv = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
|
||
|
|
NULL, as3722_intr, sc, &sc->irq_h);
|
||
|
|
if (rv) {
|
||
|
|
device_printf(dev, "Cannot setup interrupt.\n");
|
||
|
|
goto fail;
|
||
|
|
}
|
||
|
|
return (bus_generic_attach(dev));
|
||
|
|
|
||
|
|
fail:
|
||
|
|
if (sc->irq_h != NULL)
|
||
|
|
bus_teardown_intr(dev, sc->irq_res, sc->irq_h);
|
||
|
|
if (sc->irq_res != NULL)
|
||
|
|
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
|
||
|
|
LOCK_DESTROY(sc);
|
||
|
|
return (rv);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
as3722_detach(device_t dev)
|
||
|
|
{
|
||
|
|
struct as3722_softc *sc;
|
||
|
|
|
||
|
|
sc = device_get_softc(dev);
|
||
|
|
if (sc->irq_h != NULL)
|
||
|
|
bus_teardown_intr(dev, sc->irq_res, sc->irq_h);
|
||
|
|
if (sc->irq_res != NULL)
|
||
|
|
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
|
||
|
|
LOCK_DESTROY(sc);
|
||
|
|
|
||
|
|
return (bus_generic_detach(dev));
|
||
|
|
}
|
||
|
|
|
||
|
|
static phandle_t
|
||
|
|
as3722_gpio_get_node(device_t bus, device_t dev)
|
||
|
|
{
|
||
|
|
|
||
|
|
/* We only have one child, the GPIO bus, which needs our own node. */
|
||
|
|
return (ofw_bus_get_node(bus));
|
||
|
|
}
|
||
|
|
|
||
|
|
static device_method_t as3722_methods[] = {
|
||
|
|
/* Device interface */
|
||
|
|
DEVMETHOD(device_probe, as3722_probe),
|
||
|
|
DEVMETHOD(device_attach, as3722_attach),
|
||
|
|
DEVMETHOD(device_detach, as3722_detach),
|
||
|
|
|
||
|
|
/* Regdev interface */
|
||
|
|
DEVMETHOD(regdev_map, as3722_regulator_map),
|
||
|
|
|
||
|
|
/* RTC interface */
|
||
|
|
DEVMETHOD(clock_gettime, as3722_rtc_gettime),
|
||
|
|
DEVMETHOD(clock_settime, as3722_rtc_settime),
|
||
|
|
|
||
|
|
/* GPIO protocol interface */
|
||
|
|
DEVMETHOD(gpio_get_bus, as3722_gpio_get_bus),
|
||
|
|
DEVMETHOD(gpio_pin_max, as3722_gpio_pin_max),
|
||
|
|
DEVMETHOD(gpio_pin_getname, as3722_gpio_pin_getname),
|
||
|
|
DEVMETHOD(gpio_pin_getflags, as3722_gpio_pin_getflags),
|
||
|
|
DEVMETHOD(gpio_pin_getcaps, as3722_gpio_pin_getcaps),
|
||
|
|
DEVMETHOD(gpio_pin_setflags, as3722_gpio_pin_setflags),
|
||
|
|
DEVMETHOD(gpio_pin_get, as3722_gpio_pin_get),
|
||
|
|
DEVMETHOD(gpio_pin_set, as3722_gpio_pin_set),
|
||
|
|
DEVMETHOD(gpio_pin_toggle, as3722_gpio_pin_toggle),
|
||
|
|
DEVMETHOD(gpio_map_gpios, as3722_gpio_map_gpios),
|
||
|
|
|
||
|
|
/* fdt_pinctrl interface */
|
||
|
|
DEVMETHOD(fdt_pinctrl_configure, as3722_pinmux_configure),
|
||
|
|
|
||
|
|
/* ofw_bus interface */
|
||
|
|
DEVMETHOD(ofw_bus_get_node, as3722_gpio_get_node),
|
||
|
|
|
||
|
|
DEVMETHOD_END
|
||
|
|
};
|
||
|
|
|
||
|
|
static devclass_t as3722_devclass;
|
||
|
|
DEFINE_CLASS_0(gpio, as3722_driver, as3722_methods,
|
||
|
|
sizeof(struct as3722_softc));
|
||
|
|
EARLY_DRIVER_MODULE(as3722, iicbus, as3722_driver, as3722_devclass,
|
||
|
|
0, 0, 74);
|