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sys/dev/drm/allwinner/aw_de2.c
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/*- | |||||
* Copyright (c) 2019 Emmanuel Vadot <manu@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 ``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 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. | |||||
* | |||||
* $FreeBSD$ | |||||
*/ | |||||
#include <sys/cdefs.h> | |||||
__FBSDID("$FreeBSD$"); | |||||
#include <sys/param.h> | |||||
#include <sys/systm.h> | |||||
#include <sys/bus.h> | |||||
#include <sys/fbio.h> | |||||
#include <sys/kernel.h> | |||||
#include <sys/module.h> | |||||
#include <sys/rman.h> | |||||
#include <sys/resource.h> | |||||
#include <machine/bus.h> | |||||
#include <vm/vm.h> | |||||
#include <vm/vm_extern.h> | |||||
#include <vm/vm_kern.h> | |||||
#include <vm/pmap.h> | |||||
#include <dev/fdt/simplebus.h> | |||||
#include <dev/ofw/ofw_bus.h> | |||||
#include <dev/ofw/ofw_bus_subr.h> | |||||
#include <dev/extres/syscon/syscon.h> | |||||
#include "syscon_if.h" | |||||
#define SRAM_C_SYSCON_OFFSET 0x4 | |||||
#define SRAM_C_ASSIGN_TO_DE_VALUE 1 | |||||
#define SRAM_C_ASSIGN_TO_DE_SHIFT 24 | |||||
static struct ofw_compat_data compat_data[] = { | |||||
{ "allwinner,sun50i-a64-de2", 1 }, | |||||
{ NULL, 0 } | |||||
}; | |||||
struct aw_de2_softc { | |||||
struct simplebus_softc sc; | |||||
device_t dev; | |||||
}; | |||||
static int aw_de2_probe(device_t dev); | |||||
static int aw_de2_attach(device_t dev); | |||||
static int aw_de2_detach(device_t dev); | |||||
static int | |||||
aw_de2_probe(device_t dev) | |||||
{ | |||||
if (!ofw_bus_status_okay(dev)) | |||||
return (ENXIO); | |||||
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) | |||||
return (ENXIO); | |||||
device_set_desc(dev, "Allwinner DE2"); | |||||
return (BUS_PROBE_DEFAULT); | |||||
} | |||||
static int | |||||
aw_de2_attach(device_t dev) | |||||
{ | |||||
struct aw_de2_softc *sc; | |||||
struct syscon *syscon; | |||||
device_t cdev; | |||||
phandle_t node, child; | |||||
phandle_t sram[2]; | |||||
uint32_t reg; | |||||
sc = device_get_softc(dev); | |||||
sc->dev = dev; | |||||
node = ofw_bus_get_node(dev); | |||||
/* Assign sram to DE */ | |||||
if (OF_getencprop(node, "allwinner,sram", sram, sizeof(sram)) <= 0) { | |||||
device_printf(dev, "Cannot get allwinner,sram property\n"); | |||||
return (ENXIO); | |||||
} | |||||
sram[0] = OF_parent(OF_parent(OF_node_from_xref(sram[0]))); | |||||
if (syscon_get_by_ofw_node(dev, sram[0], &syscon) != 0) { | |||||
device_printf(dev, "Cannot get syscon node\n"); | |||||
return (ENXIO); | |||||
} | |||||
reg = SYSCON_READ_4(syscon, SRAM_C_SYSCON_OFFSET); | |||||
reg &= ~(SRAM_C_ASSIGN_TO_DE_VALUE << SRAM_C_ASSIGN_TO_DE_SHIFT); | |||||
SYSCON_WRITE_4(syscon, SRAM_C_SYSCON_OFFSET, reg); | |||||
simplebus_init(dev, node); | |||||
if (simplebus_fill_ranges(node, &sc->sc) < 0) { | |||||
device_printf(dev, "could not get ranges\n"); | |||||
return (ENXIO); | |||||
} | |||||
for (child = OF_child(node); child > 0; child = OF_peer(child)) { | |||||
cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL); | |||||
if (cdev != NULL) | |||||
device_probe_and_attach(cdev); | |||||
} | |||||
return (bus_generic_attach(dev)); | |||||
} | |||||
static int | |||||
aw_de2_detach(device_t dev) | |||||
{ | |||||
bus_generic_detach(dev); | |||||
return (0); | |||||
} | |||||
static device_method_t aw_de2_methods[] = { | |||||
/* Device interface */ | |||||
DEVMETHOD(device_probe, aw_de2_probe), | |||||
DEVMETHOD(device_attach, aw_de2_attach), | |||||
DEVMETHOD(device_detach, aw_de2_detach), | |||||
DEVMETHOD_END | |||||
}; | |||||
DEFINE_CLASS_1(aw_de2, aw_de2_driver, aw_de2_methods, | |||||
sizeof(struct aw_de2_softc), simplebus_driver); | |||||
static devclass_t aw_de2_devclass; | |||||
EARLY_DRIVER_MODULE(aw_de2, simplebus, aw_de2_driver, | |||||
aw_de2_devclass, 0, 0, BUS_PASS_SUPPORTDEV + BUS_PASS_ORDER_FIRST); | |||||
MODULE_VERSION(aw_de2, 1); |