1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Keystone EVM : Board initialization
4  *
5  * (C) Copyright 2014
6  *     Texas Instruments Incorporated, <www.ti.com>
7  */
8 
9 #include <common.h>
10 #include <asm/io.h>
11 #include <asm/arch/psc_defs.h>
12 #include <asm/arch/hardware.h>
13 
14 /**
15  * cpu_to_bus - swap bytes of the 32-bit data if the device is BE
16  * @ptr - array of data
17  * @length - lenght of data array
18  */
19 int cpu_to_bus(u32 *ptr, u32 length)
20 {
21 	u32 i;
22 
23 	if (!(readl(KS2_DEVSTAT) & 0x1))
24 		for (i = 0; i < length; i++, ptr++)
25 			*ptr = cpu_to_be32(*ptr);
26 
27 	return 0;
28 }
29 
30 static void turn_off_all_dsps(int num_dsps)
31 {
32 	int i;
33 
34 	for (i = 0; i < num_dsps; i++) {
35 		if (psc_disable_module(i + KS2_LPSC_GEM_0))
36 			printf("Cannot disable module for #%d DSP", i);
37 
38 		if (psc_disable_domain(i + KS2_GEM_0_PWR_DOMAIN))
39 			printf("Cannot disable domain for #%d DSP", i);
40 	}
41 }
42 
43 int misc_init_r(void)
44 {
45 	char *env;
46 	long ks2_debug = 0;
47 
48 	env = env_get("ks2_debug");
49 
50 	if (env)
51 		ks2_debug = simple_strtol(env, NULL, 0);
52 
53 	if ((ks2_debug & DBG_LEAVE_DSPS_ON) == 0)
54 		turn_off_all_dsps(KS2_NUM_DSPS);
55 
56 	return 0;
57 }
58