board/theobroma-systems/puma_rk3399/puma-rk3399.c

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