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freebsd-dev/sys/arm64/nvidia/tegra210/max77620.c
Elliott Mitchell 21cc0918c7 sys: Nuke double-semicolons 
A distinct number of double-semicolons have ended up in FreeBSD.  Take a
pass at getting rid of many of these harmless typos.

Reviewed by: emaste, rrs
Pull Request: https://github.com/freebsd/freebsd-src/pull/609
Differential Revision: https://reviews.freebsd.org/D31716
2022-11-02 09:34:20 -06:00

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/*-
* Copyright (c) 2019 Michal Meloun <mmel@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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* MAX77620 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 <dt-bindings/mfd/max77620.h>
#include "clock_if.h"
#include "regdev_if.h"
#include "max77620.h"
static struct ofw_compat_data compat_data[] = {
{"maxim,max77620", 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, "max77620")
#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 MAX77620_DEVICE_ID 0x0C
/*
* Raw register access function.
*/
int
max77620_read(struct max77620_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 max77620_read_buf(struct max77620_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
max77620_write(struct max77620_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
max77620_write_buf(struct max77620_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
max77620_modify(struct max77620_softc *sc, uint8_t reg, uint8_t clear,
uint8_t set)
{
uint8_t val;
int rv;
rv = max77620_read(sc, reg, &val);
if (rv != 0)
return (rv);
val &= ~clear;
val |= set;
rv = max77620_write(sc, reg, val);
if (rv != 0)
return (rv);
return (0);
}
static int
max77620_parse_fps(struct max77620_softc *sc, int id, phandle_t node)
{
int val;
if (OF_getencprop(node, "maxim,shutdown-fps-time-period-us", &val,
sizeof(val)) >= 0) {
val = min(val, MAX77620_FPS_PERIOD_MAX_US);
val = max(val, MAX77620_FPS_PERIOD_MIN_US);
sc->shutdown_fps[id] = val;
}
if (OF_getencprop(node, "maxim,suspend-fps-time-period-us", &val,
sizeof(val)) >= 0) {
val = min(val, MAX77620_FPS_PERIOD_MAX_US);
val = max(val, MAX77620_FPS_PERIOD_MIN_US);
sc->suspend_fps[id] = val;
}
if (OF_getencprop(node, "maxim,fps-event-source", &val,
sizeof(val)) >= 0) {
if (val > 2) {
device_printf(sc->dev, "Invalid 'fps-event-source' "
"value: %d\n", val);
return (EINVAL);
}
sc->event_source[id] = val;
}
return (0);
}
static int
max77620_parse_fdt(struct max77620_softc *sc, phandle_t node)
{
phandle_t fpsnode;
char fps_name[6];
int i, rv;
for (i = 0; i < MAX77620_FPS_COUNT; i++) {
sc->shutdown_fps[i] = -1;
sc->suspend_fps[i] = -1;
sc->event_source[i] = -1;
}
fpsnode = ofw_bus_find_child(node, "fps");
if (fpsnode > 0) {
for (i = 0; i < MAX77620_FPS_COUNT; i++) {
sprintf(fps_name, "fps%d", i);
node = ofw_bus_find_child(node, fps_name);
if (node <= 0)
continue;
rv = max77620_parse_fps(sc, i, node);
if (rv != 0)
return (rv);
}
}
return (0);
}
static int
max77620_get_version(struct max77620_softc *sc)
{
uint8_t buf[6];
int i;
int rv;
/* Verify ID string (5 bytes ). */
for (i = 0; i <= 6; i++) {
rv = RD1(sc, MAX77620_REG_CID0 + i , buf + i);
if (rv != 0) {
device_printf(sc->dev, "Cannot read chip ID: %d\n", rv);
return (ENXIO);
}
}
if (bootverbose) {
device_printf(sc->dev,
" ID: [0x%02X, 0x%02X, 0x%02X, 0x%02X]\n",
buf[0], buf[1], buf[2], buf[3]);
}
device_printf(sc->dev, " MAX77620 version - OTP: 0x%02X, ES: 0x%02X\n",
buf[4], buf[5]);
return (0);
}
static uint8_t
max77620_encode_fps_period(struct max77620_softc *sc, int val)
{
uint8_t i;
int period;
period = MAX77620_FPS_PERIOD_MIN_US;
for (i = 0; i < 7; i++) {
if (period >= val)
return (i);
period *= 2;
}
return (i);
}
static int
max77620_init(struct max77620_softc *sc)
{
uint8_t mask, val, tmp;
int i, rv;
mask = 0;
val = 0;
for (i = 0; i < MAX77620_FPS_COUNT; i++) {
if (sc->shutdown_fps[i] != -1) {
mask |= MAX77620_FPS_TIME_PERIOD_MASK;
tmp = max77620_encode_fps_period(sc,
sc->shutdown_fps[i]);
val |= (tmp << MAX77620_FPS_TIME_PERIOD_SHIFT) &
MAX77620_FPS_TIME_PERIOD_MASK;
}
if (sc->event_source[i] != -1) {
mask |= MAX77620_FPS_EN_SRC_MASK;
tmp = sc->event_source[i];
val |= (tmp << MAX77620_FPS_EN_SRC_SHIFT) &
MAX77620_FPS_EN_SRC_MASK;
if (sc->event_source[i] == 2) {
mask |= MAX77620_FPS_ENFPS_SW_MASK;
val |= MAX77620_FPS_ENFPS_SW;
}
}
rv = RM1(sc, MAX77620_REG_FPS_CFG0 + i, mask, val);
if (rv != 0) {
device_printf(sc->dev, "I/O error: %d\n", rv);
return (ENXIO);
}
}
/* Global mask interrupts */
rv = RM1(sc, MAX77620_REG_INTENLBT, 0x81, 0x81);
rv = RM1(sc, MAX77620_REG_IRQTOPM, 0x81, 0x81);
if (rv != 0)
return (ENXIO);
return (0);
}
#ifdef notyet
static void
max77620_intr(void *arg)
{
struct max77620_softc *sc;
uint8_t intenlbt, intlbt, irqtop, irqtopm, irqsd, irqmasksd;
uint8_t irq_lvl2_l0_7, irq_lvl2_l8, irq_lvl2_gpio, irq_msk_l0_7, irq_msk_l8;
uint8_t onoffirq, onoffirqm;
sc = (struct max77620_softc *)arg;
/* XXX Finish temperature alarms. */
RD1(sc, MAX77620_REG_INTENLBT, &intenlbt);
RD1(sc, MAX77620_REG_INTLBT, &intlbt);
RD1(sc, MAX77620_REG_IRQTOP, &irqtop);
RD1(sc, MAX77620_REG_IRQTOPM, &irqtopm);
RD1(sc, MAX77620_REG_IRQSD, &irqsd);
RD1(sc, MAX77620_REG_IRQMASKSD, &irqmasksd);
RD1(sc, MAX77620_REG_IRQ_LVL2_L0_7, &irq_lvl2_l0_7);
RD1(sc, MAX77620_REG_IRQ_MSK_L0_7, &irq_msk_l0_7);
RD1(sc, MAX77620_REG_IRQ_LVL2_L8, &irq_lvl2_l8);
RD1(sc, MAX77620_REG_IRQ_MSK_L8, &irq_msk_l8);
RD1(sc, MAX77620_REG_IRQ_LVL2_GPIO, &irq_lvl2_gpio);
RD1(sc, MAX77620_REG_ONOFFIRQ, &onoffirq);
RD1(sc, MAX77620_REG_ONOFFIRQM, &onoffirqm);
printf("%s: intlbt: 0x%02X, intenlbt: 0x%02X\n", __func__, intlbt, intenlbt);
printf("%s: irqtop: 0x%02X, irqtopm: 0x%02X\n", __func__, irqtop, irqtopm);
printf("%s: irqsd: 0x%02X, irqmasksd: 0x%02X\n", __func__, irqsd, irqmasksd);
printf("%s: onoffirq: 0x%02X, onoffirqm: 0x%02X\n", __func__, onoffirq, onoffirqm);
printf("%s: irq_lvl2_l0_7: 0x%02X, irq_msk_l0_7: 0x%02X\n", __func__, irq_lvl2_l0_7, irq_msk_l0_7);
printf("%s: irq_lvl2_l8: 0x%02X, irq_msk_l8: 0x%02X\n", __func__, irq_lvl2_l8, irq_msk_l8);
printf("%s: irq_lvl2_gpio: 0x%02X\n", __func__, irq_lvl2_gpio);
}
#endif
static int
max77620_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, "MAX77620 PMIC");
return (BUS_PROBE_DEFAULT);
}
static int
max77620_attach(device_t dev)
{
struct max77620_softc *sc;
int 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);
rv = 0;
LOCK_INIT(sc);
rid = 0;
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE);
#ifdef notyet /* Interrupt parent is not implemented */
if (sc->irq_res == NULL) {
device_printf(dev, "Cannot allocate interrupt.\n");
rv = ENXIO;
goto fail;
}
#endif
rv = max77620_parse_fdt(sc, node);
if (rv != 0)
goto fail;
rv = max77620_get_version(sc);
if (rv != 0)
goto fail;
rv = max77620_init(sc);
if (rv != 0)
goto fail;
rv = max77620_regulator_attach(sc, node);
if (rv != 0)
goto fail;
rv = max77620_gpio_attach(sc, node);
if (rv != 0)
goto fail;
rv = max77620_rtc_create(sc, node);
if (rv != 0)
goto fail;
fdt_pinctrl_register(dev, NULL);
fdt_pinctrl_configure_by_name(dev, "default");
/* Setup interrupt. */
#ifdef notyet
rv = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
NULL, max77620_intr, sc, &sc->irq_h);
if (rv) {
device_printf(dev, "Cannot setup interrupt.\n");
goto fail;
}
#endif
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
max77620_detach(device_t dev)
{
struct max77620_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
max77620_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 max77620_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, max77620_probe),
DEVMETHOD(device_attach, max77620_attach),
DEVMETHOD(device_detach, max77620_detach),
/* Regdev interface */
DEVMETHOD(regdev_map, max77620_regulator_map),
/* GPIO protocol interface */
DEVMETHOD(gpio_get_bus, max77620_gpio_get_bus),
DEVMETHOD(gpio_pin_max, max77620_gpio_pin_max),
DEVMETHOD(gpio_pin_getname, max77620_gpio_pin_getname),
DEVMETHOD(gpio_pin_getflags, max77620_gpio_pin_getflags),
DEVMETHOD(gpio_pin_getcaps, max77620_gpio_pin_getcaps),
DEVMETHOD(gpio_pin_setflags, max77620_gpio_pin_setflags),
DEVMETHOD(gpio_pin_get, max77620_gpio_pin_get),
DEVMETHOD(gpio_pin_set, max77620_gpio_pin_set),
DEVMETHOD(gpio_pin_toggle, max77620_gpio_pin_toggle),
DEVMETHOD(gpio_map_gpios, max77620_gpio_map_gpios),
/* fdt_pinctrl interface */
DEVMETHOD(fdt_pinctrl_configure, max77620_pinmux_configure),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_node, max77620_gpio_get_node),
DEVMETHOD_END
};
static DEFINE_CLASS_0(gpio, max77620_driver, max77620_methods,
sizeof(struct max77620_softc));
EARLY_DRIVER_MODULE(max77620, iicbus, max77620_driver, NULL, NULL, 74);
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