1 /* $NetBSD: ofw_spi_subr.c,v 1.1 2021/02/04 20:19:09 thorpej Exp $ */
2
3 /*
4 * Copyright 1998
5 * Digital Equipment Corporation. All rights reserved.
6 *
7 * This software is furnished under license and may be used and
8 * copied only in accordance with the following terms and conditions.
9 * Subject to these conditions, you may download, copy, install,
10 * use, modify and distribute this software in source and/or binary
11 * form. No title or ownership is transferred hereby.
12 *
13 * 1) Any source code used, modified or distributed must reproduce
14 * and retain this copyright notice and list of conditions as
15 * they appear in the source file.
16 *
17 * 2) No right is granted to use any trade name, trademark, or logo of
18 * Digital Equipment Corporation. Neither the "Digital Equipment
19 * Corporation" name nor any trademark or logo of Digital Equipment
20 * Corporation may be used to endorse or promote products derived
21 * from this software without the prior written permission of
22 * Digital Equipment Corporation.
23 *
24 * 3) This software is provided "AS-IS" and any express or implied
25 * warranties, including but not limited to, any implied warranties
26 * of merchantability, fitness for a particular purpose, or
27 * non-infringement are disclaimed. In no event shall DIGITAL be
28 * liable for any damages whatsoever, and in particular, DIGITAL
29 * shall not be liable for special, indirect, consequential, or
30 * incidental damages or damages for lost profits, loss of
31 * revenue or loss of use, whether such damages arise in contract,
32 * negligence, tort, under statute, in equity, at law or otherwise,
33 * even if advised of the possibility of such damage.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: ofw_spi_subr.c,v 1.1 2021/02/04 20:19:09 thorpej Exp $");
38
39 #include <sys/param.h>
40 #include <sys/device.h>
41 #include <sys/kmem.h>
42 #include <sys/systm.h>
43 #include <dev/ofw/openfirm.h>
44
45 void
of_enter_spi_devs(prop_dictionary_t props,int ofnode,size_t cell_size)46 of_enter_spi_devs(prop_dictionary_t props, int ofnode, size_t cell_size)
47 {
48 int node, len;
49 char name[32];
50 uint64_t reg64;
51 uint32_t reg32;
52 uint32_t slave;
53 u_int32_t maxfreq;
54 prop_array_t array = NULL;
55 prop_dictionary_t dev;
56 int mode;
57
58 for (node = OF_child(ofnode); node; node = OF_peer(node)) {
59 if (OF_getprop(node, "name", name, sizeof(name)) <= 0)
60 continue;
61 len = OF_getproplen(node, "reg");
62 slave = 0;
63 if (cell_size == 8 && len >= sizeof(reg64)) {
64 if (OF_getprop(node, "reg", ®64, sizeof(reg64))
65 < sizeof(reg64))
66 continue;
67 slave = be64toh(reg64);
68 } else if (cell_size == 4 && len >= sizeof(reg32)) {
69 if (OF_getprop(node, "reg", ®32, sizeof(reg32))
70 < sizeof(reg32))
71 continue;
72 slave = be32toh(reg32);
73 } else {
74 continue;
75 }
76 if (of_getprop_uint32(node, "spi-max-frequency", &maxfreq)) {
77 maxfreq = 0;
78 }
79 mode = ((int)of_hasprop(node, "cpol") << 1) | (int)of_hasprop(node, "cpha");
80
81 if (array == NULL)
82 array = prop_array_create();
83
84 dev = prop_dictionary_create();
85 prop_dictionary_set_string(dev, "name", name);
86 prop_dictionary_set_uint32(dev, "slave", slave);
87 prop_dictionary_set_uint32(dev, "mode", mode);
88 if (maxfreq > 0)
89 prop_dictionary_set_uint32(dev, "spi-max-frequency", maxfreq);
90 prop_dictionary_set_uint64(dev, "cookie", node);
91 of_to_dataprop(dev, node, "compatible", "compatible");
92 prop_array_add(array, dev);
93 prop_object_release(dev);
94 }
95
96 if (array != NULL) {
97 prop_dictionary_set(props, "spi-child-devices", array);
98 prop_object_release(array);
99 }
100 }
101