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/* $OpenBSD: mainbus.c,v 1.1 2016/12/17 23:38:33 patrick Exp $ */
/*
* Copyright (c) 2016 Patrick Wildt <patrick@blueri.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/fdt.h>
#include <arm64/arm64/arm64var.h>
#include <arm64/dev/mainbus.h>
int mainbus_match(struct device *, void *, void *);
void mainbus_attach(struct device *, struct device *, void *);
void mainbus_attach_node(struct device *, int);
struct mainbus_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_dma_tag_t sc_dmat;
int sc_acells;
int sc_scells;
int *sc_ranges;
int sc_rangeslen;
};
struct cfattach mainbus_ca = {
sizeof(struct mainbus_softc), mainbus_match, mainbus_attach, NULL,
config_activate_children
};
struct cfdriver mainbus_cd = {
NULL, "mainbus", DV_DULL
};
struct machine_bus_dma_tag mainbus_dma_tag = {
NULL,
_dmamap_create,
_dmamap_destroy,
_dmamap_load,
_dmamap_load_mbuf,
_dmamap_load_uio,
_dmamap_load_raw,
_dmamap_load_buffer,
_dmamap_unload,
_dmamap_sync,
_dmamem_alloc,
_dmamem_free,
_dmamem_map,
_dmamem_unmap,
_dmamem_mmap,
};
/*
* Mainbus takes care of FDT and non-FDT machines, so we
* always attach.
*/
int
mainbus_match(struct device *parent, void *cfdata, void *aux)
{
return (1);
}
extern char *hw_prod;
void
mainbus_attach(struct device *parent, struct device *self, void *aux)
{
struct mainbus_softc *sc = (struct mainbus_softc *)self;
char buffer[128];
int node, len;
if ((node = OF_peer(0)) == 0)
panic("mainbus: no device tree");
arm_intr_init_fdt();
sc->sc_iot = &arm64_bs_tag;
sc->sc_dmat = &mainbus_dma_tag;
sc->sc_acells = OF_getpropint(OF_peer(0), "#address-cells", 1);
sc->sc_scells = OF_getpropint(OF_peer(0), "#size-cells", 1);
if ((len = OF_getprop(node, "model", buffer, sizeof(buffer))) > 0) {
printf(": %s\n", buffer);
hw_prod = malloc(len, M_DEVBUF, M_NOWAIT);
if (hw_prod)
strlcpy(hw_prod, buffer, len);
} else
printf(": unknown model\n");
/* Attach CPU first. */
mainbus_legacy_found(self, "cpu");
/* TODO: Scan for interrupt controllers and attach them first? */
sc->sc_rangeslen = OF_getproplen(OF_peer(0), "ranges");
if (sc->sc_rangeslen > 0 && !(sc->sc_rangeslen % sizeof(uint32_t))) {
sc->sc_ranges = malloc(sc->sc_rangeslen, M_TEMP, M_WAITOK);
OF_getpropintarray(OF_peer(0), "ranges", sc->sc_ranges,
sc->sc_rangeslen);
}
/* Scan the whole tree. */
for (node = OF_child(node);
node != 0;
node = OF_peer(node))
{
mainbus_attach_node(self, node);
}
}
/*
* Look for a driver that wants to be attached to this node.
*/
void
mainbus_attach_node(struct device *self, int node)
{
struct mainbus_softc *sc = (struct mainbus_softc *)self;
struct fdt_attach_args fa;
char buffer[128];
int i, len, line;
uint32_t *cell, *reg;
if (!OF_getprop(node, "compatible", buffer, sizeof(buffer)))
return;
if (OF_getprop(node, "status", buffer, sizeof(buffer)))
if (!strcmp(buffer, "disabled"))
return;
memset(&fa, 0, sizeof(fa));
fa.fa_name = "";
fa.fa_node = node;
fa.fa_iot = sc->sc_iot;
fa.fa_dmat = sc->sc_dmat;
fa.fa_acells = sc->sc_acells;
fa.fa_scells = sc->sc_scells;
len = OF_getproplen(node, "reg");
line = (sc->sc_acells + sc->sc_scells) * sizeof(uint32_t);
if (len > 0 && (len % line) == 0) {
reg = malloc(len, M_TEMP, M_WAITOK);
OF_getpropintarray(node, "reg", reg, len);
fa.fa_reg = malloc((len / line) * sizeof(struct fdt_reg),
M_DEVBUF, M_WAITOK);
fa.fa_nreg = (len / line);
for (i = 0, cell = reg; i < len / line; i++) {
if (sc->sc_acells >= 1)
fa.fa_reg[i].addr = cell[0];
if (sc->sc_acells == 2) {
fa.fa_reg[i].addr <<= 32;
fa.fa_reg[i].addr |= cell[1];
}
cell += sc->sc_acells;
if (sc->sc_scells >= 1)
fa.fa_reg[i].size = cell[0];
if (sc->sc_scells == 2) {
fa.fa_reg[i].size <<= 32;
fa.fa_reg[i].size |= cell[1];
}
cell += sc->sc_scells;
}
free(reg, M_TEMP, len);
}
len = OF_getproplen(node, "interrupts");
if (len > 0 && (len % sizeof(uint32_t)) == 0) {
fa.fa_intr = malloc(len, M_DEVBUF, M_WAITOK);
fa.fa_nintr = len / sizeof(uint32_t);
OF_getpropintarray(node, "interrupts", fa.fa_intr, len);
}
/* TODO: attach the device's clocks first? */
config_found(self, &fa, NULL);
free(fa.fa_reg, M_DEVBUF, fa.fa_nreg * sizeof(struct fdt_reg));
free(fa.fa_intr, M_DEVBUF, fa.fa_nintr * sizeof(uint32_t));
}
/*
* Legacy support for SoCs that do not use FDT.
*/
void
mainbus_legacy_found(struct device *self, char *name)
{
union mainbus_attach_args ma;
memset(&ma, 0, sizeof(ma));
ma.ma_name = name;
config_found(self, &ma, NULL);
}
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