1/*-
2 * Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/param.h>
31#include <sys/conf.h>
32#include <sys/bus.h>
33#include <sys/kernel.h>
34#include <sys/kobj.h>
35#include <sys/malloc.h>
36#include <sys/mutex.h>
37#include <sys/module.h>
38#include <sys/rman.h>
39#include <sys/systm.h>
40
41#include <machine/bus.h>
42
43#include <dev/ofw/ofw_bus.h>
44#include <dev/ofw/ofw_bus_subr.h>
45#include <dev/extres/clk/clk_link.h>
46
47static int clknode_link_init(struct clknode *clk, device_t dev);
48static int clknode_link_recalc(struct clknode *clk, uint64_t *freq);
49static int clknode_link_set_freq(struct clknode *clk, uint64_t fin,
50    uint64_t *fout, int flags, int *stop);
51static int clknode_link_set_mux(struct clknode *clk, int idx);
52static int clknode_link_set_gate(struct clknode *clk, bool enable);
53
54static clknode_method_t clknode_link_methods[] = {
55	/* Device interface */
56	CLKNODEMETHOD(clknode_init,	   clknode_link_init),
57	CLKNODEMETHOD(clknode_recalc_freq, clknode_link_recalc),
58	CLKNODEMETHOD(clknode_set_freq,	   clknode_link_set_freq),
59	CLKNODEMETHOD(clknode_set_gate,	   clknode_link_set_gate),
60	CLKNODEMETHOD(clknode_set_mux,	   clknode_link_set_mux),
61	CLKNODEMETHOD_END
62};
63DEFINE_CLASS_1(clknode_link, clknode_link_class, clknode_link_methods,
64   0, clknode_class);
65
66static int
67clknode_link_init(struct clknode *clk, device_t dev)
68{
69	return(0);
70}
71
72static int
73clknode_link_recalc(struct clknode *clk, uint64_t *freq)
74{
75
76	printf("%s: Attempt to use unresolved linked clock: %s\n", __func__,
77	    clknode_get_name(clk));
78	return (EBADF);
79}
80
81static int
82clknode_link_set_freq(struct clknode *clk, uint64_t fin, uint64_t *fout,
83    int flags, int *stop)
84{
85
86	printf("%s: Attempt to use unresolved linked clock: %s\n", __func__,
87	    clknode_get_name(clk));
88	return (EBADF);
89}
90
91static int
92clknode_link_set_mux(struct clknode *clk, int idx)
93{
94
95	printf("%s: Attempt to use unresolved linked clock: %s\n", __func__,
96	    clknode_get_name(clk));
97	return (EBADF);
98}
99
100static int
101clknode_link_set_gate(struct clknode *clk, bool enable)
102{
103
104	printf("%s: Attempt to use unresolved linked clock: %s\n", __func__,
105	    clknode_get_name(clk));
106	return (EBADF);
107}
108
109int
110clknode_link_register(struct clkdom *clkdom, struct clk_link_def *clkdef)
111{
112	struct clknode *clk;
113	struct clknode_init_def tmp;
114
115	tmp = clkdef->clkdef;
116	tmp.flags |= CLK_NODE_LINKED;
117	clk = clknode_create(clkdom, &clknode_link_class, &tmp);
118	if (clk == NULL)
119		return (1);
120	clknode_register(clkdom, clk);
121	return (0);
122}
123