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Add a GPIO driver for the Arm pl061 controller

Browse Source 
A PL061 is a simple 8 pin GPIO controller. This GPIO device is used to
signal an internal request for shutdown on some virtual machines including
Arm-based Amazon EC2 instances.

Submitted by:	Ali Saidi <alisaidi_amazon.com> (previouss version)
Reviewed by:	Ali Saidi, manu
Differential Revision:	https://reviews.freebsd.org/D24065
This commit is contained in:
Andrew Turner 2020-09-08 11:35:35 +00:00
parent 30fe2bbfae
commit 1fc1a22868
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=365450
6 changed files with 843 additions and 0 deletions
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1
sys/arm64/conf/GENERIC
View File

@ -257,6 +257,7 @@ device gpioregulator
device ls1046_gpio # LS1046A GPIO controller
device mv_gpio # Marvell GPIO controller
device mvebu_pinctrl # Marvell Pinmux Controller
device pl061 # Arm PL061 GPIO controller
device rk_gpio # RockChip GPIO Controller
device rk_pinctrl # RockChip Pinmux Controller

3
sys/conf/files.arm64
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@ -305,6 +305,9 @@ dev/iicbus/sy8106a.c optional sy8106a fdt
dev/iicbus/twsi/mv_twsi.c optional twsi fdt
dev/iicbus/twsi/a10_twsi.c optional twsi fdt
dev/iicbus/twsi/twsi.c optional twsi fdt
dev/gpio/pl061.c optional pl061 gpio
dev/gpio/pl061_acpi.c optional pl061 gpio acpi
dev/gpio/pl061_fdt.c optional pl061 gpio fdt
dev/hwpmc/hwpmc_arm64.c optional hwpmc
dev/hwpmc/hwpmc_arm64_md.c optional hwpmc
dev/mbox/mbox_if.m optional soc_brcm_bcm2837

580
sys/dev/gpio/pl061.c Normal file
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@ -0,0 +1,580 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2020 Amazon.com, Inc. or its affiliates.
* 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/proc.h>
#include <sys/rman.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/gpio.h>
#include <sys/interrupt.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <machine/resource.h>
#include <dev/gpio/gpiobusvar.h>
#include "pl061.h"
#include "gpio_if.h"
#include "pic_if.h"
#define PL061_LOCK(_sc) mtx_lock_spin(&(_sc)->sc_mtx)
#define PL061_UNLOCK(_sc) mtx_unlock_spin(&(_sc)->sc_mtx)
#define PL061_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx)
#define PL061_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED)
#define PL061_ASSERT_UNLOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_NOTOWNED)
#if 0
#define dprintf(fmt, args...) do { \
printf(fmt, ##args); \
} while (0)
#else
#define dprintf(fmt, args...)
#endif
#define PL061_PIN_TO_ADDR(pin) (1 << (pin + 2))
#define PL061_DATA 0x3FC
#define PL061_DIR 0x400
#define PL061_INTSENSE 0x404
#define PL061_INTBOTHEDGES 0x408
#define PL061_INTEVENT 0x40C
#define PL061_INTMASK 0x410
#define PL061_RAWSTATUS 0x414
#define PL061_STATUS 0x418
#define PL061_INTCLR 0x41C
#define PL061_MODECTRL 0x420
#define PL061_ALLOWED_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | GPIO_INTR_EDGE_BOTH | \
GPIO_INTR_EDGE_RISING | GPIO_INTR_EDGE_FALLING | \
GPIO_INTR_LEVEL_HIGH | GPIO_INTR_LEVEL_LOW )
#define PIC_INTR_ISRC(sc, irq) (&(sc->sc_isrcs[irq].isrc))
static device_t
pl061_get_bus(device_t dev)
{
struct pl061_softc *sc;
sc = device_get_softc(dev);
return (sc->sc_busdev);
}
static int
pl061_pin_max(device_t dev, int *maxpin)
{
*maxpin = PL061_NUM_GPIO - 1;
return (0);
}
static int
pl061_pin_getname(device_t dev, uint32_t pin, char *name)
{
struct pl061_softc *sc;
sc = device_get_softc(dev);
if (pin >= PL061_NUM_GPIO)
return (EINVAL);
snprintf(name, GPIOMAXNAME, "p%u", pin);
name[GPIOMAXNAME - 1] = '\0';
return (0);
}
static int
pl061_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
{
struct pl061_softc *sc;
uint8_t mask = 1 << pin;
sc = device_get_softc(dev);
if (pin >= PL061_NUM_GPIO)
return (EINVAL);
PL061_LOCK(sc);
*flags = 0;
if (mask & bus_read_1(sc->sc_mem_res, PL061_DIR))
*flags |= GPIO_PIN_OUTPUT;
else
*flags |= GPIO_PIN_INPUT;
PL061_UNLOCK(sc);
return (0);
}
static int
pl061_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
{
struct pl061_softc *sc;
sc = device_get_softc(dev);
if (pin >= PL061_NUM_GPIO)
return (EINVAL);
*caps = PL061_ALLOWED_CAPS;
return (0);
}
static void
mask_and_set(struct pl061_softc *sc, long a, uint8_t m, uint8_t b)
{
uint8_t tmp;
tmp = bus_read_1(sc->sc_mem_res, a);
tmp &= ~m;
tmp |= b;
bus_write_1(sc->sc_mem_res, a, tmp);
dprintf("%s: writing %#x to register %#lx\n", __func__, tmp, a);
}
static int
pl061_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
{
struct pl061_softc *sc;
uint8_t mask = 1 << pin;
const uint32_t in_out = (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT);
sc = device_get_softc(dev);
if (pin >= PL061_NUM_GPIO)
return (EINVAL);
if (flags & ~PL061_ALLOWED_CAPS)
return (EINVAL);
/* can't be both input and output */
if ((flags & in_out) == in_out)
return (EINVAL);
PL061_LOCK(sc);
mask_and_set(sc, PL061_DIR, mask, flags & GPIO_PIN_OUTPUT ? mask : 0);
PL061_UNLOCK(sc);
return (0);
}
static int
pl061_pin_get(device_t dev, uint32_t pin, uint32_t *value)
{
struct pl061_softc *sc;
sc = device_get_softc(dev);
if (pin >= PL061_NUM_GPIO)
return (EINVAL);
PL061_LOCK(sc);
if (bus_read_1(sc->sc_mem_res, PL061_PIN_TO_ADDR(pin)))
*value = GPIO_PIN_HIGH;
else
*value = GPIO_PIN_LOW;
PL061_UNLOCK(sc);
return (0);
}
static int
pl061_pin_set(device_t dev, uint32_t pin, uint32_t value)
{
struct pl061_softc *sc;
uint8_t d = (value == GPIO_PIN_HIGH) ? 0xff : 0x00;
sc = device_get_softc(dev);
if (pin >= PL061_NUM_GPIO)
return (EINVAL);
PL061_LOCK(sc);
bus_write_1(sc->sc_mem_res, PL061_PIN_TO_ADDR(pin), d);
PL061_UNLOCK(sc);
return (0);
}
static int
pl061_pin_toggle(device_t dev, uint32_t pin)
{
struct pl061_softc *sc;
uint8_t d;
sc = device_get_softc(dev);
if (pin >= PL061_NUM_GPIO)
return (EINVAL);
PL061_LOCK(sc);
d = ~bus_read_1(sc->sc_mem_res, PL061_PIN_TO_ADDR(pin));
bus_write_1(sc->sc_mem_res, PL061_PIN_TO_ADDR(pin), d);
PL061_UNLOCK(sc);
return (0);
}
static void
pl061_pic_disable_intr(device_t dev, struct intr_irqsrc *isrc)
{
struct pl061_softc *sc;
uint8_t mask;
sc = device_get_softc(dev);
mask = 1 << ((struct pl061_pin_irqsrc *)isrc)->irq;
dprintf("%s: calling disable interrupt %#x\n", __func__, mask);
PL061_LOCK(sc);
mask_and_set(sc, PL061_INTMASK, mask, 0);
PL061_UNLOCK(sc);
}
static void
pl061_pic_enable_intr(device_t dev, struct intr_irqsrc *isrc)
{
struct pl061_softc *sc;
uint8_t mask;
sc = device_get_softc(dev);
mask = 1 << ((struct pl061_pin_irqsrc *)isrc)->irq;
dprintf("%s: calling enable interrupt %#x\n", __func__, mask);
PL061_LOCK(sc);
mask_and_set(sc, PL061_INTMASK, mask, mask);
PL061_UNLOCK(sc);
}
static int
pl061_pic_map_intr(device_t dev, struct intr_map_data *data,
struct intr_irqsrc **isrcp)
{
struct pl061_softc *sc;
struct intr_map_data_gpio *gdata;
uint32_t irq;
sc = device_get_softc(dev);
if (data->type != INTR_MAP_DATA_GPIO)
return (ENOTSUP);
gdata = (struct intr_map_data_gpio *)data;
irq = gdata->gpio_pin_num;
if (irq >= PL061_NUM_GPIO) {
device_printf(dev, "invalid interrupt number %u\n", irq);
return (EINVAL);
}
dprintf("%s: calling map interrupt %u\n", __func__, irq);
*isrcp = PIC_INTR_ISRC(sc, irq);
return (0);
}
static int
pl061_pic_setup_intr(device_t dev, struct intr_irqsrc *isrc,
struct resource *res, struct intr_map_data *data)
{
struct pl061_softc *sc;
struct intr_map_data_gpio *gdata;
struct pl061_pin_irqsrc *irqsrc;
uint32_t mode;
uint8_t mask;
if (data == NULL)
return (ENOTSUP);
sc = device_get_softc(dev);
gdata = (struct intr_map_data_gpio *)data;
irqsrc = (struct pl061_pin_irqsrc *)isrc;
mode = gdata->gpio_intr_mode;
mask = 1 << gdata->gpio_pin_num;
dprintf("%s: calling setup interrupt %u mode %#x\n", __func__,
irqsrc->irq, mode);
if (irqsrc->irq != gdata->gpio_pin_num) {
dprintf("%s: interrupts don't match\n", __func__);
return (EINVAL);
}
if (isrc->isrc_handlers != 0) {
dprintf("%s: handler already attached\n", __func__);
return (irqsrc->mode == mode ? 0 : EINVAL);
}
irqsrc->mode = mode;
PL061_LOCK(sc);
if (mask & GPIO_INTR_EDGE_BOTH) {
mask_and_set(sc, PL061_INTBOTHEDGES, mask, mask);
mask_and_set(sc, PL061_INTSENSE, mask, 0);
} else if (mask & GPIO_INTR_EDGE_RISING) {
mask_and_set(sc, PL061_INTBOTHEDGES, mask, 0);
mask_and_set(sc, PL061_INTSENSE, mask, 0);
mask_and_set(sc, PL061_INTEVENT, mask, mask);
} else if (mask & GPIO_INTR_EDGE_FALLING) {
mask_and_set(sc, PL061_INTBOTHEDGES, mask, 0);
mask_and_set(sc, PL061_INTSENSE, mask, 0);
mask_and_set(sc, PL061_INTEVENT, mask, 0);
} else if (mask & GPIO_INTR_LEVEL_HIGH) {
mask_and_set(sc, PL061_INTBOTHEDGES, mask, 0);
mask_and_set(sc, PL061_INTSENSE, mask, mask);
mask_and_set(sc, PL061_INTEVENT, mask, mask);
} else if (mask & GPIO_INTR_LEVEL_LOW) {
mask_and_set(sc, PL061_INTBOTHEDGES, mask, 0);
mask_and_set(sc, PL061_INTSENSE, mask, mask);
mask_and_set(sc, PL061_INTEVENT, mask, 0);
}
PL061_UNLOCK(sc);
return (0);
}
static int
pl061_pic_teardown_intr(device_t dev, struct intr_irqsrc *isrc,
struct resource *res, struct intr_map_data *data)
{
struct pl061_softc *sc;
struct pl061_pin_irqsrc *irqsrc;
uint8_t mask;
irqsrc = (struct pl061_pin_irqsrc *)isrc;
mask = 1 << irqsrc->irq;
dprintf("%s: calling teardown interrupt %#x\n", __func__, mask);
sc = device_get_softc(dev);
if (isrc->isrc_handlers == 0) {
irqsrc->mode = GPIO_INTR_CONFORM;
PL061_LOCK(sc);
mask_and_set(sc, PL061_INTMASK, mask, 0);
PL061_UNLOCK(sc);
}
return (0);
}
static void
pl061_pic_post_filter(device_t dev, struct intr_irqsrc *isrc)
{
struct pl061_softc *sc;
uint8_t mask;
sc = device_get_softc(dev);
mask = 1 << ((struct pl061_pin_irqsrc *)isrc)->irq;
dprintf("%s: calling post filter %#x\n", __func__, mask);
bus_write_1(sc->sc_mem_res, PL061_INTCLR, mask);
}
static void
pl061_pic_post_ithread(device_t dev, struct intr_irqsrc *isrc)
{
struct pl061_softc *sc;
uint8_t mask;
sc = device_get_softc(dev);
mask = 1 << ((struct pl061_pin_irqsrc *)isrc)->irq;
dprintf("%s: calling post ithread %#x\n", __func__, mask);
bus_write_1(sc->sc_mem_res, PL061_INTCLR, mask);
pl061_pic_enable_intr(dev, isrc);
}
static void
pl061_pic_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
{
pl061_pic_disable_intr(dev, isrc);
}
static int
pl061_intr(void *arg)
{
struct pl061_softc *sc;
struct trapframe *tf;
uint8_t status;
int pin;
sc = (struct pl061_softc *)arg;
tf = curthread->td_intr_frame;
status = bus_read_1(sc->sc_mem_res, PL061_STATUS);
while (status != 0) {
pin = ffs(status) - 1;
status &= ~(1 << pin);
if (intr_isrc_dispatch(PIC_INTR_ISRC(sc, pin), tf) != 0)
device_printf(sc->sc_dev, "spurious interrupt %d\n",
pin);
dprintf("got IRQ on %d\n", pin);
}
return (FILTER_HANDLED);
}
int
pl061_attach(device_t dev)
{
struct pl061_softc *sc;
int ret;
int irq;
const char *name;
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_mem_rid = 0;
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->sc_mem_rid, RF_ACTIVE);
if (sc->sc_mem_res == NULL) {
device_printf(dev, "can't allocate memory resource\n");
return (ENXIO);
}
sc->sc_irq_rid = 0;
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
&sc->sc_irq_rid, RF_ACTIVE);
if (sc->sc_irq_res == NULL) {
device_printf(dev, "can't allocate IRQ resource\n");
goto free_mem;
}
ret = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
pl061_intr, NULL, sc, &sc->sc_irq_hdlr);
if (ret) {
device_printf(dev, "can't setup IRQ\n");
goto free_pic;
}
name = device_get_nameunit(dev);
for (irq = 0; irq < PL061_NUM_GPIO; irq++) {
if (bootverbose) {
device_printf(dev,
"trying to register pin %d name %s\n", irq, name);
}
sc->sc_isrcs[irq].irq = irq;
sc->sc_isrcs[irq].mode = GPIO_INTR_CONFORM;
ret = intr_isrc_register(PIC_INTR_ISRC(sc, irq), dev, 0,
"%s", name);
if (ret) {
device_printf(dev, "can't register isrc %d\n", ret);
goto free_isrc;
}
}
sc->sc_busdev = gpiobus_attach_bus(dev);
if (sc->sc_busdev == NULL) {
device_printf(dev, "couldn't attach gpio bus\n");
goto free_isrc;
}
mtx_init(&sc->sc_mtx, device_get_nameunit(dev), "pl061", MTX_SPIN);
return (0);
free_isrc:
/*
* XXX isrc_release_counters() not implemented
* for (irq = 0; irq < PL061_NUM_GPIO; irq++)
* intr_isrc_deregister(PIC_INTR_ISRC(sc, irq));
*/
bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irq_rid,
sc->sc_irq_res);
free_pic:
/*
* XXX intr_pic_deregister: not implemented
* intr_pic_deregister(dev, 0);
*/
free_mem:
bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_mem_rid,
sc->sc_mem_res);
return (ENXIO);
}
int
pl061_detach(device_t dev)
{
struct pl061_softc *sc;
sc = device_get_softc(dev);
if (sc->sc_busdev)
gpiobus_detach_bus(dev);
if (sc->sc_irq_hdlr != NULL)
bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_irq_hdlr);
if (sc->sc_irq_res != NULL)
bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irq_rid,
sc->sc_irq_res);
if (sc->sc_mem_res != NULL)
bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_mem_rid,
sc->sc_mem_res);
PL061_LOCK_DESTROY(sc);
return (0);
}
static device_method_t pl061_methods[] = {
/* Device interface */
DEVMETHOD(device_attach, pl061_attach),
DEVMETHOD(device_detach, pl061_detach),
/* GPIO protocol */
DEVMETHOD(gpio_get_bus, pl061_get_bus),
DEVMETHOD(gpio_pin_max, pl061_pin_max),
DEVMETHOD(gpio_pin_getname, pl061_pin_getname),
DEVMETHOD(gpio_pin_getflags, pl061_pin_getflags),
DEVMETHOD(gpio_pin_getcaps, pl061_pin_getcaps),
DEVMETHOD(gpio_pin_setflags, pl061_pin_setflags),
DEVMETHOD(gpio_pin_get, pl061_pin_get),
DEVMETHOD(gpio_pin_set, pl061_pin_set),
DEVMETHOD(gpio_pin_toggle, pl061_pin_toggle),
/* Interrupt controller interface */
DEVMETHOD(pic_disable_intr, pl061_pic_disable_intr),
DEVMETHOD(pic_enable_intr, pl061_pic_enable_intr),
DEVMETHOD(pic_map_intr, pl061_pic_map_intr),
DEVMETHOD(pic_setup_intr, pl061_pic_setup_intr),
DEVMETHOD(pic_teardown_intr, pl061_pic_teardown_intr),
DEVMETHOD(pic_post_filter, pl061_pic_post_filter),
DEVMETHOD(pic_post_ithread, pl061_pic_post_ithread),
DEVMETHOD(pic_pre_ithread, pl061_pic_pre_ithread),
DEVMETHOD_END
};
DEFINE_CLASS_0(pl061, pl061_driver, pl061_methods, sizeof(struct pl061_softc));

59
sys/dev/gpio/pl061.h Normal file
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@ -0,0 +1,59 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2020 Amazon.com, Inc. or its affiliates.
* 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.
*
* $FreeBSD$
*/
#ifndef __DEV_PL061_H__
#define __DEV_PL061_H__
DECLARE_CLASS(pl061_driver);
#define PL061_NUM_GPIO 8
struct pl061_pin_irqsrc {
struct intr_irqsrc isrc;
uint32_t irq;
uint32_t mode;
};
struct pl061_softc {
device_t sc_dev;
device_t sc_busdev;
struct mtx sc_mtx;
struct resource *sc_mem_res;
struct resource *sc_irq_res;
void *sc_irq_hdlr;
int sc_mem_rid;
int sc_irq_rid;
struct pl061_pin_irqsrc sc_isrcs[PL061_NUM_GPIO];
};
int pl061_attach(device_t);
int pl061_detach(device_t);
#endif /* __DEV_PL061_H__ */

103
sys/dev/gpio/pl061_acpi.c Normal file
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@ -0,0 +1,103 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2020 Amazon.com, Inc. or its affiliates.
* 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 "opt_acpi.h"
#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/lock.h>
#include <sys/mutex.h>
#include <machine/intr.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <dev/acpica/acpivar.h>
#include <dev/gpio/gpiobusvar.h>
#include "pl061.h"
static char *gpio_ids[] = { "ARMH0061", NULL };
static int
pl061_acpi_probe(device_t dev)
{
int rv;
if (acpi_disabled("gpio"))
return (ENXIO);
rv = ACPI_ID_PROBE(device_get_parent(dev), dev, gpio_ids, NULL);
if (rv <= 0)
device_set_desc(dev, "Arm PL061 GPIO Controller");
return (rv);
}
static int
pl061_acpi_attach(device_t dev)
{
int error;
error = pl061_attach(dev);
if (error != 0)
return (error);
if (!intr_pic_register(dev, ACPI_INTR_XREF)) {
device_printf(dev, "couldn't register PIC\n");
pl061_detach(dev);
error = ENXIO;
}
return (error);
}
static device_method_t pl061_acpi_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, pl061_acpi_probe),
DEVMETHOD(device_attach, pl061_acpi_attach),
DEVMETHOD_END
};
DEFINE_CLASS_1(pl061, pl061_acpi_driver, pl061_acpi_methods,
sizeof(struct pl061_softc), pl061_driver);
static devclass_t pl061_devclass;
DRIVER_MODULE(pl061, acpi, pl061_driver, pl061_devclass, NULL, NULL);
MODULE_DEPEND(pl061, acpi, 1, 1, 1);
MODULE_DEPEND(pl061, gpiobus, 1, 1, 1);

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sys/dev/gpio/pl061_fdt.c Normal file
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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 Andrew Turner
*
* This work was supported by Innovate UK project 105694, "Digital Security
* by Design (DSbD) Technology Platform Prototype".
*
* 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/lock.h>
#include <sys/mutex.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/gpio/gpiobusvar.h>
#include "pl061.h"
static int
pl061_fdt_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "arm,pl061"))
return (ENXIO);
device_set_desc(dev, "Arm PL061 GPIO Controller");
return (BUS_PROBE_DEFAULT);
}
static int
pl061_fdt_attach(device_t dev)
{
int error;
error = pl061_attach(dev);
if (error != 0)
return (error);
if (!intr_pic_register(dev, OF_xref_from_node(ofw_bus_get_node(dev)))) {
device_printf(dev, "couldn't register PIC\n");
pl061_detach(dev);
error = ENXIO;
}
return (error);
}
static device_method_t pl061_fdt_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, pl061_fdt_probe),
DEVMETHOD(device_attach, pl061_fdt_attach),
DEVMETHOD_END
};
DEFINE_CLASS_1(gpio, pl061_fdt_driver, pl061_fdt_methods,
sizeof(struct pl061_softc), pl061_driver);
static devclass_t pl061_devclass;
EARLY_DRIVER_MODULE(pl061, ofwbus, pl061_fdt_driver, pl061_devclass, NULL, NULL,
BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE);
MODULE_DEPEND(pl061, gpiobus, 1, 1, 1);