freebsd-dev/sys/arm/nvidia/as3722.c
Michal Meloun 4bda238a9b TEGRA: Prepare Tegra subtree for inclusion into ARM generic kernel.
- use DEFINE_CLASS_0() for driver classes
 - unify driver names
 - cleanup driver definitions and bindings
2016-09-30 05:25:15 +00:00

412 lines
9.4 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, &reg);
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;
static DEFINE_CLASS_0(gpio, as3722_driver, as3722_methods,
sizeof(struct as3722_softc));
EARLY_DRIVER_MODULE(as3722, iicbus, as3722_driver, as3722_devclass,
NULL, NULL, 74);