/* $NetBSD: eqos_acpi.c,v 1.2 2023/12/24 16:12:54 skrll Exp $ */
/*-
* Copyright (c) 2022 Jared McNeill <
[email protected]>
* 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 ``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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: eqos_acpi.c,v 1.2 2023/12/24 16:12:54 skrll Exp $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/device.h>
#include <sys/kmem.h>
#include <sys/rndsource.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#include <dev/mii/miivar.h>
#include <dev/ic/dwc_eqos_var.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpi_intr.h>
#define CSR_RATE_RGMII 125000000
static const struct device_compatible_entry compat_data[] = {
{ .compat = "snps,dwmac-4.20a" }, /* DT link */
DEVICE_COMPAT_EOL
};
static int eqos_acpi_match(device_t, cfdata_t, void *);
static void eqos_acpi_attach(device_t, device_t, void *);
static void eqos_acpi_init_props(struct eqos_softc *, ACPI_HANDLE);
CFATTACH_DECL_NEW(eqos_acpi, sizeof(struct eqos_softc),
eqos_acpi_match, eqos_acpi_attach, NULL, NULL);
static int
eqos_acpi_match(device_t parent, cfdata_t cf, void *aux)
{
struct acpi_attach_args *aa = aux;
return acpi_compatible_match(aa, compat_data);
}
static void
eqos_acpi_attach(device_t parent, device_t self, void *aux)
{
struct eqos_softc * const sc = device_private(self);
struct acpi_attach_args *aa = aux;
ACPI_HANDLE handle = aa->aa_node->ad_handle;
struct acpi_resources res;
struct acpi_mem *mem;
struct acpi_irq *irq;
ACPI_STATUS rv;
int error;
void *ih;
sc->sc_dev = self;
rv = acpi_resource_parse(sc->sc_dev, handle, "_CRS",
&res, &acpi_resource_parse_ops_default);
if (ACPI_FAILURE(rv))
return;
mem = acpi_res_mem(&res, 0);
if (mem == NULL) {
aprint_error_dev(self, "couldn't find mem resource\n");
goto done;
}
irq = acpi_res_irq(&res, 0);
if (irq == NULL) {
aprint_error_dev(self, "couldn't find irq resource\n");
goto done;
}
sc->sc_bst = aa->aa_memt;
error = bus_space_map(sc->sc_bst, mem->ar_base, mem->ar_length,
0, &sc->sc_bsh);
if (error != 0) {
aprint_error_dev(self, "couldn't map registers\n");
goto done;
}
sc->sc_dmat = BUS_DMA_TAG_VALID(aa->aa_dmat64) ?
aa->aa_dmat64 : aa->aa_dmat;
sc->sc_phy_id = MII_PHY_ANY;
sc->sc_csr_clock = CSR_RATE_RGMII;
eqos_acpi_init_props(sc, handle);
aprint_normal("%s", device_xname(self));
if (eqos_attach(sc) != 0)
goto done;
ih = acpi_intr_establish(self, (uint64_t)(uintptr_t)handle, IPL_NET,
true, eqos_intr, sc, device_xname(self));
if (ih == NULL) {
aprint_error_dev(self, "couldn't establish interrupt\n");
goto done;
}
done:
acpi_resource_cleanup(&res);
}
static void
eqos_acpi_init_props(struct eqos_softc *sc, ACPI_HANDLE handle)
{
prop_dictionary_t prop = device_properties(sc->sc_dev);
ACPI_STATUS rv;
ACPI_INTEGER ival;
#if notyet
ACPI_HANDLE axi;
char *sval;
#endif
/* Defaults */
prop_dictionary_set_uint(prop, "snps,wr_osr_lmt", 4);
prop_dictionary_set_uint(prop, "snps,rd_osr_lmt", 8);
/* Get settings from DSD properties */
rv = acpi_dsd_integer(handle, "snps,mixed-burst", &ival);
if (ACPI_SUCCESS(rv) && ival) {
prop_dictionary_set_bool(prop, "snps,mixed-burst", true);
}
rv = acpi_dsd_integer(handle, "snps,tso", &ival);
if (ACPI_SUCCESS(rv) && ival) {
prop_dictionary_set_bool(prop, "snps,tso", true);
}
#if notyet
rv = acpi_dsd_string(handle, "snps,axi-config", &sval);
if (ACPI_SUCCESS(rv)) {
rv = AcpiGetHandle(handle, sval, &axi);
if (ACPI_SUCCESS(rv)) {
rv = acpi_dsd_integer(axi, "snps,wr_osr_lmt", &ival);
if (ACPI_SUCCESS(rv) && ival > 0) {
prop_dictionary_set_uint(prop,
"snps,wr_osr_lmt", ival);
}
rv = acpi_dsd_integer(axi, "snps,rd_osr_lmt", &ival);
if (ACPI_SUCCESS(rv) && ival > 0) {
prop_dictionary_set_uint(prop,
"snps,rd_osr_lmt", ival);
}
}
kmem_strfree(sval);
}
#endif
}
