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