1 /*
2  * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6 #include <common.h>
7 #include <dm.h>
8 #include <misc.h>
9 #include <ram.h>
10 #include <dm/pinctrl.h>
11 #include <dm/uclass-internal.h>
12 #include <misc.h>
13 #include <asm/setup.h>
14 #include <asm/arch/periph.h>
15 #include <power/regulator.h>
16 #include <u-boot/sha256.h>
17 
18 #define RK3399_CPUID_OFF  0x7
19 #define RK3399_CPUID_LEN  0x10
20 
21 DECLARE_GLOBAL_DATA_PTR;
22 
23 #define RK3399_CPUID_OFF  0x7
24 #define RK3399_CPUID_LEN  0x10
25 
26 DECLARE_GLOBAL_DATA_PTR;
27 
28 int board_init(void)
29 {
30 	struct udevice *pinctrl, *regulator;
31 	int ret;
32 
33 	/*
34 	 * The PWM does not have decicated interrupt number in dts and can
35 	 * not get periph_id by pinctrl framework, so let's init them here.
36 	 * The PWM2 and PWM3 are for pwm regulators.
37 	 */
38 	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
39 	if (ret) {
40 		debug("%s: Cannot find pinctrl device\n", __func__);
41 		goto out;
42 	}
43 
44 	ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_PWM2);
45 	if (ret) {
46 		debug("%s PWM2 pinctrl init fail!\n", __func__);
47 		goto out;
48 	}
49 
50 	/* rk3399 need to init vdd_center to get the correct output voltage */
51 	ret = regulator_get_by_platname("vdd_center", &regulator);
52 	if (ret)
53 		debug("%s: Cannot get vdd_center regulator\n", __func__);
54 
55 	ret = regulator_get_by_platname("vcc5v0_host", &regulator);
56 	if (ret) {
57 		debug("%s vcc5v0_host init fail! ret %d\n", __func__, ret);
58 		goto out;
59 	}
60 
61 	ret = regulator_set_enable(regulator, true);
62 	if (ret) {
63 		debug("%s vcc5v0-host-en set fail!\n", __func__);
64 		goto out;
65 	}
66 
67 out:
68 	return 0;
69 }
70 
71 static void setup_macaddr(void)
72 {
73 #if CONFIG_IS_ENABLED(CMD_NET)
74 	int ret;
75 	const char *cpuid = getenv("cpuid#");
76 	u8 hash[SHA256_SUM_LEN];
77 	int size = sizeof(hash);
78 	u8 mac_addr[6];
79 
80 	/* Only generate a MAC address, if none is set in the environment */
81 	if (getenv("ethaddr"))
82 		return;
83 
84 	if (!cpuid) {
85 		debug("%s: could not retrieve 'cpuid#'\n", __func__);
86 		return;
87 	}
88 
89 	ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
90 	if (ret) {
91 		debug("%s: failed to calculate SHA256\n", __func__);
92 		return;
93 	}
94 
95 	/* Copy 6 bytes of the hash to base the MAC address on */
96 	memcpy(mac_addr, hash, 6);
97 
98 	/* Make this a valid MAC address and set it */
99 	mac_addr[0] &= 0xfe;  /* clear multicast bit */
100 	mac_addr[0] |= 0x02;  /* set local assignment bit (IEEE802) */
101 	eth_setenv_enetaddr("ethaddr", mac_addr);
102 #endif
103 
104 	return;
105 }
106 
107 static void setup_serial(void)
108 {
109 #if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
110 	struct udevice *dev;
111 	int ret, i;
112 	u8 cpuid[RK3399_CPUID_LEN];
113 	u8 low[RK3399_CPUID_LEN/2], high[RK3399_CPUID_LEN/2];
114 	char cpuid_str[RK3399_CPUID_LEN * 2 + 1];
115 	u64 serialno;
116 	char serialno_str[16];
117 
118 	/* retrieve the device */
119 	ret = uclass_get_device_by_driver(UCLASS_MISC,
120 					  DM_GET_DRIVER(rockchip_efuse), &dev);
121 	if (ret) {
122 		debug("%s: could not find efuse device\n", __func__);
123 		return;
124 	}
125 
126 	/* read the cpu_id range from the efuses */
127 	ret = misc_read(dev, RK3399_CPUID_OFF, &cpuid, sizeof(cpuid));
128 	if (ret) {
129 		debug("%s: reading cpuid from the efuses failed\n",
130 		      __func__);
131 		return;
132 	}
133 
134 	memset(cpuid_str, 0, sizeof(cpuid_str));
135 	for (i = 0; i < 16; i++)
136 		sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
137 
138 	debug("cpuid: %s\n", cpuid_str);
139 
140 	/*
141 	 * Mix the cpuid bytes using the same rules as in
142 	 *   ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
143 	 */
144 	for (i = 0; i < 8; i++) {
145 		low[i] = cpuid[1 + (i << 1)];
146 		high[i] = cpuid[i << 1];
147 	}
148 
149 	serialno = crc32_no_comp(0, low, 8);
150 	serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
151 	snprintf(serialno_str, sizeof(serialno_str), "%llx", serialno);
152 
153 	setenv("cpuid#", cpuid_str);
154 	setenv("serial#", serialno_str);
155 #endif
156 
157 	return;
158 }
159 
160 int misc_init_r(void)
161 {
162 	setup_serial();
163 	setup_macaddr();
164 
165 	return 0;
166 }
167 
168 #ifdef CONFIG_SERIAL_TAG
169 void get_board_serial(struct tag_serialnr *serialnr)
170 {
171 	char *serial_string;
172 	u64 serial = 0;
173 
174 	serial_string = getenv("serial#");
175 
176 	if (serial_string)
177 		serial = simple_strtoull(serial_string, NULL, 16);
178 
179 	serialnr->high = (u32)(serial >> 32);
180 	serialnr->low = (u32)(serial & 0xffffffff);
181 }
182 #endif
183