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Long overdue suggestions from Taylor Campbell and a few syntax/style 

tweaks from myself.

From Michael McConville
This commit is contained in:
macallan 2015-11-17 16:53:21 +00:00
parent ff955c277f
commit b9de1f8955
1 changed files with 16 additions and 23 deletions
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37
sys/arch/mips/ingenic/ingenic_rng.c
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@ -1,4 +1,4 @@
/* $NetBSD: ingenic_rng.c,v 1.2 2015/08/30 05:09:16 macallan Exp $ */
/* $NetBSD: ingenic_rng.c,v 1.3 2015/11/17 16:53:21 macallan Exp $ */
/*-
* Copyright (c) 2015 Michael McConville
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ingenic_rng.c,v 1.2 2015/08/30 05:09:16 macallan Exp $");
__KERNEL_RCSID(0, "$NetBSD: ingenic_rng.c,v 1.3 2015/11/17 16:53:21 macallan Exp $");
/*
* adapted from Jared McNeill's amlogic_rng.c
@ -79,29 +79,25 @@ CFATTACH_DECL_NEW(ingenic_rng, sizeof(struct ingenic_rng_softc),
static int
ingenic_rng_match(device_t parent, cfdata_t cf, void *aux)
{
struct apbus_attach_args *aa = aux;
const struct apbus_attach_args *aa = aux;
if (strcmp(aa->aa_name, "jzrng") == 0) {
return 1;
} else {
return 0;
}
return !(strcmp(aa->aa_name, "jzrng"));
}
static void
ingenic_rng_attach(device_t parent, device_t self, void *aux)
{
struct ingenic_rng_softc * const sc = device_private(self);
struct apbus_attach_args * const aa = aux;
const struct apbus_attach_args * const aa = aux;
bus_addr_t addr = aa->aa_addr;
int error;
sc->sc_dev = self;
sc->sc_bst = aa->aa_bst;
if (aa->aa_addr == 0) {
aa->aa_addr = JZ_RNG;
}
if (addr == 0)
addr = JZ_RNG;
error = bus_space_map(aa->aa_bst, aa->aa_addr, 4, 0, &sc->sc_bsh);
error = bus_space_map(aa->aa_bst, addr, 4, 0, &sc->sc_bsh);
if (error) {
aprint_error_dev(self,
"can't map registers for %s: %d\n", aa->aa_name, error);
@ -135,10 +131,7 @@ ingenic_rng_get(struct ingenic_rng_softc *sc)
mutex_spin_enter(&sc->sc_intr_lock);
while (sc->sc_bytes_wanted) {
bus_space_read_region_4(sc->sc_bst, sc->sc_bsh, 0, &data, 1);
#if 0
device_printf(sc->sc_dev, "random output: %x\n", data);
#endif
data = bus_space_read_4(sc->sc_bst, sc->sc_bsh, 0);
mutex_spin_exit(&sc->sc_intr_lock);
mutex_spin_enter(&sc->sc_rnd_lock);
rnd_add_data(&sc->sc_rndsource, &data, sizeof(data),
@ -157,14 +150,14 @@ ingenic_rng_get_cb(size_t bytes_wanted, void *priv)
struct ingenic_rng_softc * const sc = priv;
mutex_spin_enter(&sc->sc_intr_lock);
if (sc->sc_bytes_wanted == 0) {
if (sc->sc_bytes_wanted == 0)
softint_schedule(sc->sc_sih);
}
if (bytes_wanted > (UINT_MAX - sc->sc_bytes_wanted)) {
if (bytes_wanted > (UINT_MAX - sc->sc_bytes_wanted))
sc->sc_bytes_wanted = UINT_MAX;
} else {
else
sc->sc_bytes_wanted += bytes_wanted;
}
mutex_spin_exit(&sc->sc_intr_lock);
}