1/*-
2 * Copyright (c) 2012 Semihalf.
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/systm.h>
32#include <sys/kernel.h>
33#include <sys/module.h>
34#include <sys/slicer.h>
35
36#include <dev/fdt/fdt_common.h>
37
38#define DEBUG
39#undef DEBUG
40
41#ifdef DEBUG
42#define debugf(fmt, args...) do { printf("%s(): ", __func__);	\
43    printf(fmt,##args); } while (0)
44#else
45#define debugf(fmt, args...)
46#endif
47
48int
49flash_fill_slices(device_t dev, struct flash_slice *slices, int *slices_num)
50{
51	char *slice_name;
52	phandle_t dt_node, dt_child;
53	u_long base, size;
54	int i;
55	ssize_t name_len;
56
57	/*
58	 * We assume the caller provides buffer for FLASH_SLICES_MAX_NUM
59	 * flash_slice structures.
60	 */
61	if (slices == NULL) {
62		*slices_num = 0;
63		return (ENOMEM);
64	}
65
66	dt_node = ofw_bus_get_node(dev);
67	for (dt_child = OF_child(dt_node), i = 0; dt_child != 0;
68	    dt_child = OF_peer(dt_child)) {
69
70		if (i == FLASH_SLICES_MAX_NUM) {
71			debugf("not enough buffer for slice i=%d\n", i);
72			break;
73		}
74
75		/*
76		 * Retrieve start and size of the slice.
77		 */
78		if (fdt_regsize(dt_child, &base, &size) != 0) {
79			debugf("error during processing reg property, i=%d\n",
80			    i);
81			continue;
82		}
83
84		if (size == 0) {
85			debugf("slice i=%d with no size\n", i);
86			continue;
87		}
88
89		/*
90		 * Retrieve label.
91		 */
92		name_len = OF_getprop_alloc(dt_child, "label", sizeof(char),
93		    (void **)&slice_name);
94		if (name_len <= 0) {
95			/* Use node name if no label defined */
96			name_len = OF_getprop_alloc(dt_child, "name", sizeof(char),
97			    (void **)&slice_name);
98			if (name_len <= 0) {
99				debugf("slice i=%d with no name\n", i);
100				slice_name = NULL;
101			}
102		}
103
104		/*
105		 * Fill slice entry data.
106		 */
107		slices[i].base = base;
108		slices[i].size = size;
109		slices[i].label = slice_name;
110		i++;
111	}
112
113	*slices_num = i;
114	return (0);
115}
116