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 /* 200 * Swap mmc0 and mmc1 in boot_targets if booted from SD-Card. 201 * 202 * If bootsource is uSD-card we can assume that we want to use the 203 * SD-Card instead of the eMMC as first boot_target for distroboot. 204 * We only want to swap the defaults and not any custom environment a 205 * user has set. We exit early if a changed boot_targets environment 206 * is detected. 207 */ 208 static int setup_boottargets(void) 209 { 210 const char *boot_device = 211 ofnode_get_chosen_prop("u-boot,spl-boot-device"); 212 char *env_default, *env; 213 214 if (!boot_device) { 215 debug("%s: /chosen/u-boot,spl-boot-device not set\n", 216 __func__); 217 return -1; 218 } 219 debug("%s: booted from %s\n", __func__, boot_device); 220 221 env_default = env_get_default("boot_targets"); 222 env = env_get("boot_targets"); 223 if (!env) { 224 debug("%s: boot_targets does not exist\n", __func__); 225 return -1; 226 } 227 debug("%s: boot_targets current: %s - default: %s\n", 228 __func__, env, env_default); 229 230 if (strcmp(env_default, env) != 0) { 231 debug("%s: boot_targets not default, don't change it\n", 232 __func__); 233 return 0; 234 } 235 236 /* 237 * Only run, if booting from mmc1 (i.e. /dwmmc@fe320000) and 238 * only consider cases where the default boot-order first 239 * tries to boot from mmc0 (eMMC) and then from mmc1 240 * (i.e. external SD). 241 * 242 * In other words: the SD card will be moved to earlier in the 243 * order, if U-Boot was also loaded from the SD-card. 244 */ 245 if (!strcmp(boot_device, "/dwmmc@fe320000")) { 246 char *mmc0, *mmc1; 247 248 debug("%s: booted from SD-Card\n", __func__); 249 mmc0 = strstr(env, "mmc0"); 250 mmc1 = strstr(env, "mmc1"); 251 252 if (!mmc0 || !mmc1) { 253 debug("%s: only one mmc boot_target found\n", __func__); 254 return -1; 255 } 256 257 /* 258 * If mmc0 comes first in the boot order, we need to change 259 * the strings to make mmc1 first. 260 */ 261 if (mmc0 < mmc1) { 262 mmc0[3] = '1'; 263 mmc1[3] = '0'; 264 debug("%s: set boot_targets to: %s\n", __func__, env); 265 env_set("boot_targets", env); 266 } 267 } 268 269 return 0; 270 } 271 272 int misc_init_r(void) 273 { 274 setup_serial(); 275 setup_macaddr(); 276 setup_iodomain(); 277 setup_boottargets(); 278 279 return 0; 280 } 281 282 #ifdef CONFIG_SERIAL_TAG 283 void get_board_serial(struct tag_serialnr *serialnr) 284 { 285 char *serial_string; 286 u64 serial = 0; 287 288 serial_string = env_get("serial#"); 289 290 if (serial_string) 291 serial = simple_strtoull(serial_string, NULL, 16); 292 293 serialnr->high = (u32)(serial >> 32); 294 serialnr->low = (u32)(serial & 0xffffffff); 295 } 296 #endif 297 298 /** 299 * Switch power at an external regulator (for our root hub). 300 * 301 * @param ctrl pointer to the xHCI controller 302 * @param port port number as in the control message (one-based) 303 * @param enable boolean indicating whether to enable or disable power 304 * @return returns 0 on success, an error-code on failure 305 */ 306 static int board_usb_port_power_set(struct udevice *dev, int port, 307 bool enable) 308 { 309 #if CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_REGULATOR) 310 /* We start counting ports at 0, while USB counts from 1. */ 311 int index = port - 1; 312 const char *regname = NULL; 313 struct udevice *regulator; 314 const char *prop = "tsd,usb-port-power"; 315 int ret; 316 317 debug("%s: ctrl '%s' port %d enable %s\n", __func__, 318 dev_read_name(dev), port, enable ? "true" : "false"); 319 320 ret = dev_read_string_index(dev, prop, index, ®name); 321 if (ret < 0) { 322 debug("%s: ctrl '%s' port %d: no entry in '%s'\n", 323 __func__, dev_read_name(dev), port, prop); 324 return ret; 325 } 326 327 ret = regulator_get_by_platname(regname, ®ulator); 328 if (ret) { 329 debug("%s: ctrl '%s' port %d: could not get regulator '%s'\n", 330 __func__, dev_read_name(dev), port, regname); 331 return ret; 332 } 333 334 regulator_set_enable(regulator, enable); 335 return 0; 336 #else 337 return -ENOTSUPP; 338 #endif 339 } 340 341 void usb_hub_reset_devices(struct usb_hub_device *hub, int port) 342 { 343 struct udevice *dev = hub->pusb_dev->dev; 344 struct udevice *ctrl; 345 346 /* We are only interested in our root-hubs */ 347 if (usb_hub_is_root_hub(dev) == false) 348 return; 349 350 ctrl = usb_get_bus(dev); 351 if (!ctrl) { 352 debug("%s: could not retrieve ctrl for hub\n", __func__); 353 return; 354 } 355 356 /* 357 * To work around an incompatibility between the single-threaded 358 * USB stack in U-Boot and (a strange low-power mode of) the USB 359 * hub we have on-module, we need to delay powering on the hub 360 * until the first time the port is probed. 361 */ 362 board_usb_port_power_set(ctrl, port, true); 363 } 364