1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se>
*
* 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.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/libkern.h>
#include <sys/types.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/fdt/simplebus.h>
#include <dev/extres/clk/clk_mux.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include "clock_common.h"
#if 0
#define DPRINTF(dev, msg...) device_printf(dev, msg)
#else
#define DPRINTF(dev, msg...)
#endif
void
read_clock_cells(device_t dev, struct clock_cell_info *clk) {
ssize_t numbytes_clocks;
phandle_t node, parent, *cells;
int index, ncells, rv;
node = ofw_bus_get_node(dev);
/* Get names of parent clocks */
numbytes_clocks = OF_getproplen(node, "clocks");
clk->num_clock_cells = numbytes_clocks / sizeof(cell_t);
/* Allocate space and get clock cells content */
/* clock_cells / clock_cells_ncells will be freed in
* find_parent_clock_names()
*/
clk->clock_cells = malloc(numbytes_clocks, M_DEVBUF, M_WAITOK|M_ZERO);
clk->clock_cells_ncells = malloc(clk->num_clock_cells*sizeof(uint8_t),
M_DEVBUF, M_WAITOK|M_ZERO);
OF_getencprop(node, "clocks", clk->clock_cells, numbytes_clocks);
/* Count number of clocks */
clk->num_real_clocks = 0;
for (index = 0; index < clk->num_clock_cells; index++) {
rv = ofw_bus_parse_xref_list_alloc(node, "clocks", "#clock-cells",
clk->num_real_clocks, &parent, &ncells, &cells);
if (rv != 0)
continue;
if (cells != NULL)
OF_prop_free(cells);
clk->clock_cells_ncells[index] = ncells;
index += ncells;
clk->num_real_clocks++;
}
}
int
find_parent_clock_names(device_t dev, struct clock_cell_info *clk, struct clknode_init_def *def) {
int index, clock_index, err;
bool found_all = true;
clk_t parent;
/* Figure out names */
for (index = 0, clock_index = 0; index < clk->num_clock_cells; index++) {
/* Get name of parent clock */
err = clk_get_by_ofw_index(dev, 0, clock_index, &parent);
if (err != 0) {
clock_index++;
found_all = false;
DPRINTF(dev, "Failed to find clock_cells[%d]=0x%x\n",
index, clk->clock_cells[index]);
index += clk->clock_cells_ncells[index];
continue;
}
def->parent_names[clock_index] = clk_get_name(parent);
clk_release(parent);
DPRINTF(dev, "Found parent clock[%d/%d]: %s\n",
clock_index, clk->num_real_clocks,
def->parent_names[clock_index]);
clock_index++;
index += clk->clock_cells_ncells[index];
}
if (!found_all) {
return 1;
}
free(clk->clock_cells, M_DEVBUF);
free(clk->clock_cells_ncells, M_DEVBUF);
return 0;
}
void
create_clkdef(device_t dev, struct clock_cell_info *clk, struct clknode_init_def *def) {
def->id = 1;
clk_parse_ofw_clk_name(dev, ofw_bus_get_node(dev), &def->name);
DPRINTF(dev, "node name: %s\n", def->name);
def->parent_cnt = clk->num_real_clocks;
def->parent_names = malloc(clk->num_real_clocks*sizeof(char *),
M_OFWPROP, M_WAITOK);
}
void
free_clkdef(struct clknode_init_def *def) {
OF_prop_free(__DECONST(char *, def->name));
OF_prop_free(def->parent_names);
}
|
