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freebsd-skq/sys/arm/rockchip/rk30xx_gpio.c
Ian Lepore 6489412064 Remove #include <machine/frame.h> from all the arm code that doesn't 
really need it.  That would be almost everywhere it was included.  Add
it in a couple files that really do need it and were previously getting
it by accident via another header.
2013-10-27 01:34:10 +00:00

528 lines
12 KiB
C
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/*-
* Copyright (c) 2013 Ganbold Tsagaankhuu <ganbold@gmail.com>
* Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
* Copyright (c) 2012 Luiz Otavio O Souza.
* 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/gpio.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/resource.h>
#include <machine/fdt.h>
#include <machine/intr.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include "gpio_if.h"
#include "rk30xx_grf.h"
#include "rk30xx_pmu.h"
/*
* RK3188 has 4 banks of gpio.
* 32 pins per bank
* PA0 - PA7 | PB0 - PB7
* PC0 - PC7 | PD0 - PD7
*/
#define RK30_GPIO_PINS 128
#define RK30_GPIO_DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | \
GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN)
#define RK30_GPIO_NONE 0
#define RK30_GPIO_PULLUP 1
#define RK30_GPIO_PULLDOWN 2
#define RK30_GPIO_INPUT 0
#define RK30_GPIO_OUTPUT 1
struct rk30_gpio_softc {
device_t sc_dev;
struct mtx sc_mtx;
struct resource * sc_mem_res;
struct resource * sc_irq_res;
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bsh;
void * sc_intrhand;
int sc_gpio_npins;
struct gpio_pin sc_gpio_pins[RK30_GPIO_PINS];
};
#define RK30_GPIO_LOCK(_sc) mtx_lock(&_sc->sc_mtx)
#define RK30_GPIO_UNLOCK(_sc) mtx_unlock(&_sc->sc_mtx)
#define RK30_GPIO_LOCK_ASSERT(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED)
#define RK30_GPIO_SWPORT_DR 0x00
#define RK30_GPIO_SWPORT_DDR 0x04
#define RK30_GPIO_INTEN 0x30
#define RK30_GPIO_INTMASK 0x34
#define RK30_GPIO_INTTYPE_LEVEL 0x38
#define RK30_GPIO_INT_POLARITY 0x3c
#define RK30_GPIO_INT_STATUS 0x40
#define RK30_GPIO_INT_RAWSTATUS 0x44
#define RK30_GPIO_DEBOUNCE 0x48
#define RK30_GPIO_PORTS_EOI 0x4c
#define RK30_GPIO_EXT_PORT 0x50
#define RK30_GPIO_LS_SYNC 0x60
#define RK30_GPIO_WRITE(_sc, _off, _val) \
bus_space_write_4(_sc->sc_bst, _sc->sc_bsh, _off, _val)
#define RK30_GPIO_READ(_sc, _off) \
bus_space_read_4(_sc->sc_bst, _sc->sc_bsh, _off)
static uint32_t
rk30_gpio_get_function(struct rk30_gpio_softc *sc, uint32_t pin)
{
uint32_t bank, func, offset;
bank = pin / 32;
pin = pin % 32;
offset = 1 << pin;
func = RK30_GPIO_READ(sc, RK30_GPIO_SWPORT_DDR);
func &= offset;
return (func);
}
static uint32_t
rk30_gpio_func_flag(uint32_t nfunc)
{
switch (nfunc) {
case RK30_GPIO_INPUT:
return (GPIO_PIN_INPUT);
case RK30_GPIO_OUTPUT:
return (GPIO_PIN_OUTPUT);
}
return (0);
}
static void
rk30_gpio_set_function(struct rk30_gpio_softc *sc, uint32_t pin, uint32_t f)
{
uint32_t bank, data, offset;
/* Must be called with lock held. */
RK30_GPIO_LOCK_ASSERT(sc);
bank = pin / 32;
pin = pin % 32;
offset = 1 << pin;
data = RK30_GPIO_READ(sc, RK30_GPIO_SWPORT_DDR);
if (f)
data |= offset;
else
data &= ~offset;
RK30_GPIO_WRITE(sc, RK30_GPIO_SWPORT_DDR, data);
}
static void
rk30_gpio_set_pud(struct rk30_gpio_softc *sc, uint32_t pin, uint32_t state)
{
uint32_t bank;
bank = pin / 32;
/* Must be called with lock held. */
RK30_GPIO_LOCK_ASSERT(sc);
if (bank == 0 && pin < 12)
rk30_pmu_gpio_pud(pin, state);
else
rk30_grf_gpio_pud(bank, pin, state);
}
static void
rk30_gpio_pin_configure(struct rk30_gpio_softc *sc, struct gpio_pin *pin,
unsigned int flags)
{
RK30_GPIO_LOCK(sc);
/*
* Manage input/output.
*/
if (flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) {
pin->gp_flags &= ~(GPIO_PIN_INPUT|GPIO_PIN_OUTPUT);
if (flags & GPIO_PIN_OUTPUT) {
pin->gp_flags |= GPIO_PIN_OUTPUT;
rk30_gpio_set_function(sc, pin->gp_pin,
RK30_GPIO_OUTPUT);
} else {
pin->gp_flags |= GPIO_PIN_INPUT;
rk30_gpio_set_function(sc, pin->gp_pin,
RK30_GPIO_INPUT);
}
}
/* Manage Pull-up/pull-down. */
pin->gp_flags &= ~(GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN);
if (flags & (GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN)) {
if (flags & GPIO_PIN_PULLUP) {
pin->gp_flags |= GPIO_PIN_PULLUP;
rk30_gpio_set_pud(sc, pin->gp_pin,
RK30_GPIO_PULLUP);
} else {
pin->gp_flags |= GPIO_PIN_PULLDOWN;
rk30_gpio_set_pud(sc, pin->gp_pin,
RK30_GPIO_PULLDOWN);
}
} else
rk30_gpio_set_pud(sc, pin->gp_pin, RK30_GPIO_NONE);
RK30_GPIO_UNLOCK(sc);
}
static int
rk30_gpio_pin_max(device_t dev, int *maxpin)
{
*maxpin = RK30_GPIO_PINS - 1;
return (0);
}
static int
rk30_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
{
struct rk30_gpio_softc *sc = device_get_softc(dev);
int i;
for (i = 0; i < sc->sc_gpio_npins; i++) {
if (sc->sc_gpio_pins[i].gp_pin == pin)
break;
}
if (i >= sc->sc_gpio_npins)
return (EINVAL);
RK30_GPIO_LOCK(sc);
*caps = sc->sc_gpio_pins[i].gp_caps;
RK30_GPIO_UNLOCK(sc);
return (0);
}
static int
rk30_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
{
struct rk30_gpio_softc *sc = device_get_softc(dev);
int i;
for (i = 0; i < sc->sc_gpio_npins; i++) {
if (sc->sc_gpio_pins[i].gp_pin == pin)
break;
}
if (i >= sc->sc_gpio_npins)
return (EINVAL);
RK30_GPIO_LOCK(sc);
*flags = sc->sc_gpio_pins[i].gp_flags;
RK30_GPIO_UNLOCK(sc);
return (0);
}
static int
rk30_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
{
struct rk30_gpio_softc *sc = device_get_softc(dev);
int i;
for (i = 0; i < sc->sc_gpio_npins; i++) {
if (sc->sc_gpio_pins[i].gp_pin == pin)
break;
}
if (i >= sc->sc_gpio_npins)
return (EINVAL);
RK30_GPIO_LOCK(sc);
memcpy(name, sc->sc_gpio_pins[i].gp_name, GPIOMAXNAME);
RK30_GPIO_UNLOCK(sc);
return (0);
}
static int
rk30_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
{
struct rk30_gpio_softc *sc = device_get_softc(dev);
int i;
for (i = 0; i < sc->sc_gpio_npins; i++) {
if (sc->sc_gpio_pins[i].gp_pin == pin)
break;
}
if (i >= sc->sc_gpio_npins)
return (EINVAL);
/* Check for unwanted flags. */
if ((flags & sc->sc_gpio_pins[i].gp_caps) != flags)
return (EINVAL);
/* Can't mix input/output together. */
if ((flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) ==
(GPIO_PIN_INPUT|GPIO_PIN_OUTPUT))
return (EINVAL);
/* Can't mix pull-up/pull-down together. */
if ((flags & (GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN)) ==
(GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN))
return (EINVAL);
rk30_gpio_pin_configure(sc, &sc->sc_gpio_pins[i], flags);
return (0);
}
static int
rk30_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
{
struct rk30_gpio_softc *sc = device_get_softc(dev);
uint32_t bank, offset, data;
int i;
for (i = 0; i < sc->sc_gpio_npins; i++) {
if (sc->sc_gpio_pins[i].gp_pin == pin)
break;
}
if (i >= sc->sc_gpio_npins)
return (EINVAL);
bank = pin / 32;
pin = pin % 32;
offset = 1 << pin;
RK30_GPIO_LOCK(sc);
data = RK30_GPIO_READ(sc, RK30_GPIO_SWPORT_DDR);
data |= offset;
RK30_GPIO_WRITE(sc, RK30_GPIO_SWPORT_DDR, data);
data = RK30_GPIO_READ(sc, RK30_GPIO_SWPORT_DR);
if (value)
data |= offset;
else
data &= ~offset;
RK30_GPIO_WRITE(sc, RK30_GPIO_SWPORT_DR, data);
RK30_GPIO_UNLOCK(sc);
return (0);
}
static int
rk30_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val)
{
struct rk30_gpio_softc *sc = device_get_softc(dev);
uint32_t bank, offset, reg_data;
int i;
for (i = 0; i < sc->sc_gpio_npins; i++) {
if (sc->sc_gpio_pins[i].gp_pin == pin)
break;
}
if (i >= sc->sc_gpio_npins)
return (EINVAL);
bank = pin / 32;
pin = pin % 32;
offset = 1 << pin;
RK30_GPIO_LOCK(sc);
reg_data = RK30_GPIO_READ(sc, RK30_GPIO_EXT_PORT);
RK30_GPIO_UNLOCK(sc);
*val = (reg_data & offset) ? 1 : 0;
return (0);
}
static int
rk30_gpio_pin_toggle(device_t dev, uint32_t pin)
{
struct rk30_gpio_softc *sc = device_get_softc(dev);
uint32_t bank, data, offset;
int i;
for (i = 0; i < sc->sc_gpio_npins; i++) {
if (sc->sc_gpio_pins[i].gp_pin == pin)
break;
}
if (i >= sc->sc_gpio_npins)
return (EINVAL);
bank = pin / 32;
pin = pin % 32;
offset = 1 << pin;
RK30_GPIO_LOCK(sc);
data = RK30_GPIO_READ(sc, RK30_GPIO_SWPORT_DDR);
if (data & offset)
data &= ~offset;
else
data |= offset;
RK30_GPIO_WRITE(sc, RK30_GPIO_SWPORT_DDR, data);
data = RK30_GPIO_READ(sc, RK30_GPIO_SWPORT_DR);
if (data & offset)
data &= ~offset;
else
data |= offset;
RK30_GPIO_WRITE(sc, RK30_GPIO_SWPORT_DR, data);
RK30_GPIO_UNLOCK(sc);
return (0);
}
static int
rk30_gpio_probe(device_t dev)
{
if (!ofw_bus_is_compatible(dev, "rockchip,rk30xx-gpio"))
return (ENXIO);
device_set_desc(dev, "Rockchip RK30XX GPIO controller");
return (BUS_PROBE_DEFAULT);
}
static int
rk30_gpio_attach(device_t dev)
{
struct rk30_gpio_softc *sc = device_get_softc(dev);
uint32_t func;
int i, rid;
phandle_t gpio;
sc->sc_dev = dev;
mtx_init(&sc->sc_mtx, "rk30 gpio", "gpio", MTX_DEF);
rid = 0;
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (!sc->sc_mem_res) {
device_printf(dev, "cannot allocate memory window\n");
return (ENXIO);
}
sc->sc_bst = rman_get_bustag(sc->sc_mem_res);
sc->sc_bsh = rman_get_bushandle(sc->sc_mem_res);
rid = 0;
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE);
if (!sc->sc_irq_res) {
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
device_printf(dev, "cannot allocate interrupt\n");
return (ENXIO);
}
/* Find our node. */
gpio = ofw_bus_get_node(sc->sc_dev);
if (!OF_hasprop(gpio, "gpio-controller"))
/* Node is not a GPIO controller. */
goto fail;
/* Initialize the software controlled pins. */
for (i = 0; i < RK30_GPIO_PINS; i++) {
snprintf(sc->sc_gpio_pins[i].gp_name, GPIOMAXNAME,
"pin %d", i);
func = rk30_gpio_get_function(sc, i);
sc->sc_gpio_pins[i].gp_pin = i;
sc->sc_gpio_pins[i].gp_caps = RK30_GPIO_DEFAULT_CAPS;
sc->sc_gpio_pins[i].gp_flags = rk30_gpio_func_flag(func);
}
sc->sc_gpio_npins = i;
device_add_child(dev, "gpioc", device_get_unit(dev));
device_add_child(dev, "gpiobus", device_get_unit(dev));
return (bus_generic_attach(dev));
fail:
if (sc->sc_irq_res)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);
if (sc->sc_mem_res)
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
return (ENXIO);
}
static int
rk30_gpio_detach(device_t dev)
{
return (EBUSY);
}
static device_method_t rk30_gpio_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, rk30_gpio_probe),
DEVMETHOD(device_attach, rk30_gpio_attach),
DEVMETHOD(device_detach, rk30_gpio_detach),
/* GPIO protocol */
DEVMETHOD(gpio_pin_max, rk30_gpio_pin_max),
DEVMETHOD(gpio_pin_getname, rk30_gpio_pin_getname),
DEVMETHOD(gpio_pin_getflags, rk30_gpio_pin_getflags),
DEVMETHOD(gpio_pin_getcaps, rk30_gpio_pin_getcaps),
DEVMETHOD(gpio_pin_setflags, rk30_gpio_pin_setflags),
DEVMETHOD(gpio_pin_get, rk30_gpio_pin_get),
DEVMETHOD(gpio_pin_set, rk30_gpio_pin_set),
DEVMETHOD(gpio_pin_toggle, rk30_gpio_pin_toggle),
DEVMETHOD_END
};
static devclass_t rk30_gpio_devclass;
static driver_t rk30_gpio_driver = {
"gpio",
rk30_gpio_methods,
sizeof(struct rk30_gpio_softc),
};
DRIVER_MODULE(rk30_gpio, simplebus, rk30_gpio_driver, rk30_gpio_devclass, 0, 0);
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