NetBSD/sys/arch/arm/fdt/plmmc_fdt.c

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/* $NetBSD: plmmc_fdt.c,v 1.4 2021/01/27 03:10:19 thorpej Exp $ */
/*-
* Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
* 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: plmmc_fdt.c,v 1.4 2021/01/27 03:10:19 thorpej Exp $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <dev/fdt/fdtvar.h>
#include <dev/ic/pl181reg.h>
#include <dev/ic/pl181var.h>
static int plmmc_fdt_match(device_t, cfdata_t, void *);
static void plmmc_fdt_attach(device_t, device_t, void *);
static const struct device_compatible_entry compat_data[] = {
{ .compat = "arm,pl180" },
{ .compat = "arm,pl181" },
DEVICE_COMPAT_EOL
};
CFATTACH_DECL_NEW(plmmc_fdt, sizeof(struct plmmc_softc),
plmmc_fdt_match, plmmc_fdt_attach, NULL, NULL);
static int
plmmc_fdt_match(device_t parent, cfdata_t cf, void *aux)
{
struct fdt_attach_args * const faa = aux;
return of_compatible_match(faa->faa_phandle, compat_data);
}
static void
plmmc_fdt_attach(device_t parent, device_t self, void *aux)
{
struct plmmc_softc * const sc = device_private(self);
struct fdt_attach_args * const faa = aux;
const int phandle = faa->faa_phandle;
struct clk *clk;
bus_addr_t addr;
bus_size_t size;
void *ih;
if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
aprint_error(": missing 'reg' property\n");
return;
}
clk = fdtbus_clock_get_index(phandle, 0);
if (clk == NULL) {
aprint_error(": couldn't get clock\n");
return;
}
if (clk_enable(clk) != 0) {
aprint_error(": couldn't enable clock\n");
return;
}
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char intrstr[128];
if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
aprint_error(": failed to decode interrupt\n");
return;
}
sc->sc_dev = self;
sc->sc_clock_freq = clk_get_rate(clk);
of_getprop_uint32(phandle, "max-frequency", &sc->sc_max_freq);
sc->sc_bst = faa->faa_bst;
if (bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_bsh)) {
aprint_error(": couldn't map device\n");
return;
}
aprint_naive("\n");
aprint_normal("\n");
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ih = fdtbus_intr_establish_xname(phandle, 0, IPL_BIO, 0, plmmc_intr, sc,
device_xname(self));
if (ih == NULL) {
aprint_error_dev(self, "couldn't install interrupt handler\n");
return;
}
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aprint_normal_dev(self, "interrupting on %s\n", intrstr);
plmmc_init(sc);
}