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

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
   4  */
   5
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <environment.h>
   9 #include <misc.h>
  10 #include <spl.h>
  11 #include <syscon.h>
  12 #include <usb.h>
  13 #include <dm/pinctrl.h>
  14 #include <dm/uclass-internal.h>
  15 #include <asm/io.h>
  16 #include <asm/gpio.h>
  17 #include <asm/setup.h>
  18 #include <asm/arch/clock.h>
  19 #include <asm/arch/cru_rk3399.h>
  20 #include <asm/arch/hardware.h>
  21 #include <asm/arch/grf_rk3399.h>
  22 #include <asm/arch/periph.h>
  23 #include <power/regulator.h>
  24 #include <u-boot/sha256.h>
  25
  26 int board_init(void)
  27 {
  28         int ret;
  29
  30         /*
  31          * We need to call into regulators_enable_boot_on() again, as the call
  32          * during SPL may have not included all regulators.
  33          */
  34         ret = regulators_enable_boot_on(false);
  35         if (ret)
  36                 debug("%s: Cannot enable boot on regulator\n", __func__);
  37
  38         return 0;
  39 }
  40
  41 static void rk3399_force_power_on_reset(void)
  42 {
  43         ofnode node;
  44         struct gpio_desc sysreset_gpio;
  45
  46         debug("%s: trying to force a power-on reset\n", __func__);
  47
  48         node = ofnode_path("/config");
  49         if (!ofnode_valid(node)) {
  50                 debug("%s: no /config node?\n", __func__);
  51                 return;
  52         }
  53
  54         if (gpio_request_by_name_nodev(node, "sysreset-gpio", 0,
  55                                        &sysreset_gpio, GPIOD_IS_OUT)) {
  56                 debug("%s: could not find a /config/sysreset-gpio\n", __func__);
  57                 return;
  58         }
  59
  60         dm_gpio_set_value(&sysreset_gpio, 1);
  61 }
  62
  63 void spl_board_init(void)
  64 {
  65         int  ret;
  66         struct rk3399_cru *cru = rockchip_get_cru();
  67
  68         /*
  69          * The RK3399 resets only 'almost all logic' (see also in the TRM
  70          * "3.9.4 Global software reset"), when issuing a software reset.
  71          * This may cause issues during boot-up for some configurations of
  72          * the application software stack.
  73          *
  74          * To work around this, we test whether the last reset reason was
  75          * a power-on reset and (if not) issue an overtemp-reset to reset
  76          * the entire module.
  77          *
  78          * While this was previously fixed by modifying the various places
  79          * that could generate a software reset (e.g. U-Boot's sysreset
  80          * driver, the ATF or Linux), we now have it here to ensure that
  81          * we no longer have to track this through the various components.
  82          */
  83         if (cru->glb_rst_st != 0)
  84                 rk3399_force_power_on_reset();
  85
  86         /*
  87          * Turning the eMMC and SPI back on (if disabled via the Qseven
  88          * BIOS_ENABLE) signal is done through a always-on regulator).
  89          */
  90         ret = regulators_enable_boot_on(false);
  91         if (ret)
  92                 debug("%s: Cannot enable boot on regulator\n", __func__);
  93
  94         preloader_console_init();
  95 }
  96
  97 static void setup_macaddr(void)
  98 {
  99 #if CONFIG_IS_ENABLED(CMD_NET)
 100         int ret;
 101         const char *cpuid = env_get("cpuid#");
 102         u8 hash[SHA256_SUM_LEN];
 103         int size = sizeof(hash);
 104         u8 mac_addr[6];
 105
 106         /* Only generate a MAC address, if none is set in the environment */
 107         if (env_get("ethaddr"))
 108                 return;
 109
 110         if (!cpuid) {
 111                 debug("%s: could not retrieve 'cpuid#'\n", __func__);
 112                 return;
 113         }
 114
 115         ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
 116         if (ret) {
 117                 debug("%s: failed to calculate SHA256\n", __func__);
 118                 return;
 119         }
 120
 121         /* Copy 6 bytes of the hash to base the MAC address on */
 122         memcpy(mac_addr, hash, 6);
 123
 124         /* Make this a valid MAC address and set it */
 125         mac_addr[0] &= 0xfe;  /* clear multicast bit */
 126         mac_addr[0] |= 0x02;  /* set local assignment bit (IEEE802) */
 127         eth_env_set_enetaddr("ethaddr", mac_addr);
 128 #endif
 129 }
 130
 131 static void setup_serial(void)
 132 {
 133 #if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
 134         const u32 cpuid_offset = 0x7;
 135         const u32 cpuid_length = 0x10;
 136
 137         struct udevice *dev;
 138         int ret, i;
 139         u8 cpuid[cpuid_length];
 140         u8 low[cpuid_length/2], high[cpuid_length/2];
 141         char cpuid_str[cpuid_length * 2 + 1];
 142         u64 serialno;
 143         char serialno_str[17];
 144
 145         /* retrieve the device */
 146         ret = uclass_get_device_by_driver(UCLASS_MISC,
 147                                           DM_GET_DRIVER(rockchip_efuse), &dev);
 148         if (ret) {
 149                 debug("%s: could not find efuse device\n", __func__);
 150                 return;
 151         }
 152
 153         /* read the cpu_id range from the efuses */
 154         ret = misc_read(dev, cpuid_offset, &cpuid, sizeof(cpuid));
 155         if (ret) {
 156                 debug("%s: reading cpuid from the efuses failed\n",
 157                       __func__);
 158                 return;
 159         }
 160
 161         memset(cpuid_str, 0, sizeof(cpuid_str));
 162         for (i = 0; i < 16; i++)
 163                 sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
 164
 165         debug("cpuid: %s\n", cpuid_str);
 166
 167         /*
 168          * Mix the cpuid bytes using the same rules as in
 169          *   ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
 170          */
 171         for (i = 0; i < 8; i++) {
 172                 low[i] = cpuid[1 + (i << 1)];
 173                 high[i] = cpuid[i << 1];
 174         }
 175
 176         serialno = crc32_no_comp(0, low, 8);
 177         serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
 178         snprintf(serialno_str, sizeof(serialno_str), "%016llx", serialno);
 179
 180         env_set("cpuid#", cpuid_str);
 181         env_set("serial#", serialno_str);
 182 #endif
 183 }
 184
 185 static void setup_iodomain(void)
 186 {
 187         const u32 GRF_IO_VSEL_GPIO4CD_SHIFT = 3;
 188         struct rk3399_grf_regs *grf =
 189             syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 190
 191         /*
 192          * Set bit 3 in GRF_IO_VSEL so PCIE_RST# works (pin GPIO4_C6).
 193          * Linux assumes that PCIE_RST# works out of the box as it probes
 194          * PCIe before loading the iodomain driver.
 195          */
 196         rk_setreg(&grf->io_vsel, 1 << GRF_IO_VSEL_GPIO4CD_SHIFT);
 197 }
 198
 199 int misc_init_r(void)
 200 {
 201         setup_serial();
 202         setup_macaddr();
 203         setup_iodomain();
 204
 205         return 0;
 206 }
 207
 208 #ifdef CONFIG_SERIAL_TAG
 209 void get_board_serial(struct tag_serialnr *serialnr)
 210 {
 211         char *serial_string;
 212         u64 serial = 0;
 213
 214         serial_string = env_get("serial#");
 215
 216         if (serial_string)
 217                 serial = simple_strtoull(serial_string, NULL, 16);
 218
 219         serialnr->high = (u32)(serial >> 32);
 220         serialnr->low = (u32)(serial & 0xffffffff);
 221 }
 222 #endif
 223
 224 /**
 225  * Switch power at an external regulator (for our root hub).
 226  *
 227  * @param ctrl pointer to the xHCI controller
 228  * @param port port number as in the control message (one-based)
 229  * @param enable boolean indicating whether to enable or disable power
 230  * @return returns 0 on success, an error-code on failure
 231  */
 232 static int board_usb_port_power_set(struct udevice *dev, int port,
 233                                     bool enable)
 234 {
 235 #if CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_REGULATOR)
 236         /* We start counting ports at 0, while USB counts from 1. */
 237         int index = port - 1;
 238         const char *regname = NULL;
 239         struct udevice *regulator;
 240         const char *prop = "tsd,usb-port-power";
 241         int ret;
 242
 243         debug("%s: ctrl '%s' port %d enable %s\n", __func__,
 244               dev_read_name(dev), port, enable ? "true" : "false");
 245
 246         ret = dev_read_string_index(dev, prop, index, &regname);
 247         if (ret < 0) {
 248                 debug("%s: ctrl '%s' port %d: no entry in '%s'\n",
 249                       __func__, dev_read_name(dev), port, prop);
 250                 return ret;
 251         }
 252
 253         ret = regulator_get_by_platname(regname, &regulator);
 254         if (ret) {
 255                 debug("%s: ctrl '%s' port %d: could not get regulator '%s'\n",
 256                       __func__, dev_read_name(dev), port, regname);
 257                 return ret;
 258         }
 259
 260         regulator_set_enable(regulator, enable);
 261         return 0;
 262 #else
 263         return -ENOTSUPP;
 264 #endif
 265 }
 266
 267 void usb_hub_reset_devices(struct usb_hub_device *hub, int port)
 268 {
 269         struct udevice *dev = hub->pusb_dev->dev;
 270         struct udevice *ctrl;
 271
 272         /* We are only interested in our root-hubs */
 273         if (usb_hub_is_root_hub(dev) == false)
 274                 return;
 275
 276         ctrl = usb_get_bus(dev);
 277         if (!ctrl) {
 278                 debug("%s: could not retrieve ctrl for hub\n", __func__);
 279                 return;
 280         }
 281
 282         /*
 283          * To work around an incompatibility between the single-threaded
 284          * USB stack in U-Boot and (a strange low-power mode of) the USB
 285          * hub we have on-module, we need to delay powering on the hub
 286          * until the first time the port is probed.
 287          */
 288         board_usb_port_power_set(ctrl, port, true);
 289 }