1 /* $OpenBSD: pluart_fdt.c,v 1.8 2022/06/27 13:03:32 anton Exp $ */
2 /*
3 * Copyright (c) 2014 Patrick Wildt <patrick@blueri.se>
4 * Copyright (c) 2005 Dale Rahn <drahn@dalerahn.com>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/param.h>
20 #include <sys/systm.h>
21 #include <sys/tty.h>
22
23 #include <machine/bus.h>
24 #include <machine/fdt.h>
25
26 #include <dev/ic/pluartvar.h>
27
28 #include <dev/ofw/fdt.h>
29 #include <dev/ofw/openfirm.h>
30 #include <dev/ofw/ofw_clock.h>
31 #include <dev/ofw/ofw_pinctrl.h>
32
33 int pluart_fdt_match(struct device *, void *, void *);
34 void pluart_fdt_attach(struct device *, struct device *, void *);
35
36 const struct cfattach pluart_fdt_ca = {
37 sizeof(struct pluart_softc), pluart_fdt_match, pluart_fdt_attach
38 };
39
40 void
pluart_init_cons(void)41 pluart_init_cons(void)
42 {
43 struct fdt_reg reg;
44 void *node;
45
46 if ((node = fdt_find_cons("arm,pl011")) == NULL)
47 return;
48 if (fdt_get_reg(node, 0, ®))
49 return;
50
51 pluartcnattach(fdt_cons_bs_tag, reg.addr, B115200, TTYDEF_CFLAG);
52 }
53
54 int
pluart_fdt_match(struct device * parent,void * self,void * aux)55 pluart_fdt_match(struct device *parent, void *self, void *aux)
56 {
57 struct fdt_attach_args *faa = aux;
58
59 return OF_is_compatible(faa->fa_node, "arm,pl011");
60 }
61
62 void
pluart_fdt_attach(struct device * parent,struct device * self,void * aux)63 pluart_fdt_attach(struct device *parent, struct device *self, void *aux)
64 {
65 struct fdt_attach_args *faa = aux;
66 struct pluart_softc *sc = (struct pluart_softc *) self;
67 uint32_t periphid;
68
69 if (faa->fa_nreg < 1) {
70 printf(": no registers\n");
71 return;
72 }
73
74 if (OF_is_compatible(faa->fa_node, "arm,sbsa-uart")) {
75 sc->sc_hwflags |= COM_HW_SBSA;
76 } else {
77 clock_enable_all(faa->fa_node);
78 sc->sc_clkfreq = clock_get_frequency(faa->fa_node, "uartclk");
79 }
80
81 periphid = OF_getpropint(faa->fa_node, "arm,primecell-periphid", 0);
82 if (periphid != 0)
83 sc->sc_hwrev = (periphid >> 20) & 0x0f;
84
85 sc->sc_irq = fdt_intr_establish(faa->fa_node, IPL_TTY, pluart_intr,
86 sc, sc->sc_dev.dv_xname);
87
88 sc->sc_iot = faa->fa_iot;
89 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size,
90 0, &sc->sc_ioh))
91 panic("pluartattach: bus_space_map failed!");
92
93 pinctrl_byname(faa->fa_node, "default");
94
95 pluart_attach_common(sc, stdout_node == faa->fa_node);
96 }
97