1 /*
2  * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <dm.h>
9 #include <misc.h>
10 #include <dm/pinctrl.h>
11 #include <dm/uclass-internal.h>
12 #include <asm/setup.h>
13 #include <asm/arch/periph.h>
14 #include <power/regulator.h>
15 #include <spl.h>
16 #include <u-boot/sha256.h>
17 
18 DECLARE_GLOBAL_DATA_PTR;
19 
20 int board_init(void)
21 {
22 	int ret;
23 
24 	/*
25 	 * We need to call into regulators_enable_boot_on() again, as the call
26 	 * during SPL may have not included all regulators.
27 	 */
28 	ret = regulators_enable_boot_on(false);
29 	if (ret)
30 		debug("%s: Cannot enable boot on regulator\n", __func__);
31 
32 	return 0;
33 }
34 
35 void spl_board_init(void)
36 {
37 	preloader_console_init();
38 }
39 
40 static void setup_macaddr(void)
41 {
42 #if CONFIG_IS_ENABLED(CMD_NET)
43 	int ret;
44 	const char *cpuid = env_get("cpuid#");
45 	u8 hash[SHA256_SUM_LEN];
46 	int size = sizeof(hash);
47 	u8 mac_addr[6];
48 
49 	/* Only generate a MAC address, if none is set in the environment */
50 	if (env_get("ethaddr"))
51 		return;
52 
53 	if (!cpuid) {
54 		debug("%s: could not retrieve 'cpuid#'\n", __func__);
55 		return;
56 	}
57 
58 	ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
59 	if (ret) {
60 		debug("%s: failed to calculate SHA256\n", __func__);
61 		return;
62 	}
63 
64 	/* Copy 6 bytes of the hash to base the MAC address on */
65 	memcpy(mac_addr, hash, 6);
66 
67 	/* Make this a valid MAC address and set it */
68 	mac_addr[0] &= 0xfe;  /* clear multicast bit */
69 	mac_addr[0] |= 0x02;  /* set local assignment bit (IEEE802) */
70 	eth_env_set_enetaddr("ethaddr", mac_addr);
71 #endif
72 }
73 
74 static void setup_serial(void)
75 {
76 #if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
77 	const u32 cpuid_offset = 0x7;
78 	const u32 cpuid_length = 0x10;
79 
80 	struct udevice *dev;
81 	int ret, i;
82 	u8 cpuid[cpuid_length];
83 	u8 low[cpuid_length/2], high[cpuid_length/2];
84 	char cpuid_str[cpuid_length * 2 + 1];
85 	u64 serialno;
86 	char serialno_str[17];
87 
88 	/* retrieve the device */
89 	ret = uclass_get_device_by_driver(UCLASS_MISC,
90 					  DM_GET_DRIVER(rockchip_efuse), &dev);
91 	if (ret) {
92 		debug("%s: could not find efuse device\n", __func__);
93 		return;
94 	}
95 
96 	/* read the cpu_id range from the efuses */
97 	ret = misc_read(dev, cpuid_offset, &cpuid, sizeof(cpuid));
98 	if (ret) {
99 		debug("%s: reading cpuid from the efuses failed\n",
100 		      __func__);
101 		return;
102 	}
103 
104 	memset(cpuid_str, 0, sizeof(cpuid_str));
105 	for (i = 0; i < 16; i++)
106 		sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
107 
108 	debug("cpuid: %s\n", cpuid_str);
109 
110 	/*
111 	 * Mix the cpuid bytes using the same rules as in
112 	 *   ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
113 	 */
114 	for (i = 0; i < 8; i++) {
115 		low[i] = cpuid[1 + (i << 1)];
116 		high[i] = cpuid[i << 1];
117 	}
118 
119 	serialno = crc32_no_comp(0, low, 8);
120 	serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
121 	snprintf(serialno_str, sizeof(serialno_str), "%llx", serialno);
122 
123 	env_set("cpuid#", cpuid_str);
124 	env_set("serial#", serialno_str);
125 #endif
126 }
127 
128 int misc_init_r(void)
129 {
130 	setup_serial();
131 	setup_macaddr();
132 
133 	return 0;
134 }
135 
136 #ifdef CONFIG_SERIAL_TAG
137 void get_board_serial(struct tag_serialnr *serialnr)
138 {
139 	char *serial_string;
140 	u64 serial = 0;
141 
142 	serial_string = env_get("serial#");
143 
144 	if (serial_string)
145 		serial = simple_strtoull(serial_string, NULL, 16);
146 
147 	serialnr->high = (u32)(serial >> 32);
148 	serialnr->low = (u32)(serial & 0xffffffff);
149 }
150 #endif
151