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, ®name); 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, ®ulator); 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 } 290
