1 /* $OpenBSD: ofw_pinctrl.c,v 1.3 2020/06/06 16:59:43 patrick Exp $ */
2 /*
3 * Copyright (c) 2016 Mark Kettenis
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/types.h>
19 #include <sys/systm.h>
20 #include <sys/malloc.h>
21
22 #include <dev/ofw/openfirm.h>
23 #include <dev/ofw/ofw_pinctrl.h>
24
25 struct pinctrl {
26 int pc_phandle;
27 int (*pc_pinctrl)(uint32_t, void *);
28 void *pc_cookie;
29
30 LIST_ENTRY(pinctrl) pc_list;
31 };
32
33 void pinctrl_register_child(int, int (*)(uint32_t, void *), void *);
34
35 LIST_HEAD(, pinctrl) pinctrls = LIST_HEAD_INITIALIZER(pinctrl);
36
37 void
pinctrl_register(int node,int (* pinctrl)(uint32_t,void *),void * cookie)38 pinctrl_register(int node, int (*pinctrl)(uint32_t, void *), void *cookie)
39 {
40 for (node = OF_child(node); node; node = OF_peer(node))
41 pinctrl_register_child(node, pinctrl, cookie);
42 }
43
44 void
pinctrl_register_child(int node,int (* pinctrl)(uint32_t,void *),void * cookie)45 pinctrl_register_child(int node, int (*pinctrl)(uint32_t, void *), void *cookie)
46 {
47 struct pinctrl *pc;
48 uint32_t phandle;
49
50 phandle = OF_getpropint(node, "phandle", 0);
51 if (phandle) {
52 pc = malloc(sizeof(struct pinctrl), M_DEVBUF, M_WAITOK);
53 pc->pc_phandle = phandle;
54 pc->pc_pinctrl = pinctrl;
55 pc->pc_cookie = cookie;
56 LIST_INSERT_HEAD(&pinctrls, pc, pc_list);
57 }
58
59 for (node = OF_child(node); node; node = OF_peer(node))
60 pinctrl_register_child(node, pinctrl, cookie);
61 }
62
63 int
pinctrl_byphandle(uint32_t phandle)64 pinctrl_byphandle(uint32_t phandle)
65 {
66 struct pinctrl *pc;
67
68 if (phandle == 0)
69 return -1;
70
71 LIST_FOREACH(pc, &pinctrls, pc_list) {
72 if (pc->pc_phandle == phandle)
73 return pc->pc_pinctrl(pc->pc_phandle, pc->pc_cookie);
74 }
75
76 return -1;
77 }
78
79 int
pinctrl_byid(int node,int id)80 pinctrl_byid(int node, int id)
81 {
82 char pinctrl[32];
83 uint32_t *phandles;
84 int len, i;
85
86 snprintf(pinctrl, sizeof(pinctrl), "pinctrl-%d", id);
87 len = OF_getproplen(node, pinctrl);
88 if (len <= 0)
89 return -1;
90
91 phandles = malloc(len, M_TEMP, M_WAITOK);
92 OF_getpropintarray(node, pinctrl, phandles, len);
93 for (i = 0; i < len / sizeof(uint32_t); i++)
94 pinctrl_byphandle(phandles[i]);
95 free(phandles, M_TEMP, len);
96 return 0;
97 }
98
99 int
pinctrl_byname(int node,const char * config)100 pinctrl_byname(int node, const char *config)
101 {
102 int id;
103
104 id = OF_getindex(node, config, "pinctrl-names");
105 if (id < 0)
106 return -1;
107
108 return pinctrl_byid(node, id);
109 }
110