1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Freescale SOC support functions
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Author: Scott Wood <scottwood@freescale.com>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright (c) 2007 Freescale Semiconductor, Inc.
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include "ops.h"
11*4882a593Smuzhiyun #include "types.h"
12*4882a593Smuzhiyun #include "fsl-soc.h"
13*4882a593Smuzhiyun #include "stdio.h"
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun static u32 prop_buf[MAX_PROP_LEN / 4];
16*4882a593Smuzhiyun
fsl_get_immr(void)17*4882a593Smuzhiyun u32 *fsl_get_immr(void)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun void *soc;
20*4882a593Smuzhiyun unsigned long ret = 0;
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun soc = find_node_by_devtype(NULL, "soc");
23*4882a593Smuzhiyun if (soc) {
24*4882a593Smuzhiyun int size;
25*4882a593Smuzhiyun u32 naddr;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun size = getprop(soc, "#address-cells", prop_buf, MAX_PROP_LEN);
28*4882a593Smuzhiyun if (size == 4)
29*4882a593Smuzhiyun naddr = prop_buf[0];
30*4882a593Smuzhiyun else
31*4882a593Smuzhiyun naddr = 2;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun if (naddr != 1 && naddr != 2)
34*4882a593Smuzhiyun goto err;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun size = getprop(soc, "ranges", prop_buf, MAX_PROP_LEN);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun if (size < 12)
39*4882a593Smuzhiyun goto err;
40*4882a593Smuzhiyun if (prop_buf[0] != 0)
41*4882a593Smuzhiyun goto err;
42*4882a593Smuzhiyun if (naddr == 2 && prop_buf[1] != 0)
43*4882a593Smuzhiyun goto err;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun if (!dt_xlate_addr(soc, prop_buf + naddr, 8, &ret))
46*4882a593Smuzhiyun ret = 0;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun err:
50*4882a593Smuzhiyun if (!ret)
51*4882a593Smuzhiyun printf("fsl_get_immr: Failed to find immr base\r\n");
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun return (u32 *)ret;
54*4882a593Smuzhiyun }
55