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 <environment.h> 10 #include <misc.h> 11 #include <spl.h> 12 #include <syscon.h> 13 #include <usb.h> 14 #include <dm/pinctrl.h> 15 #include <dm/uclass-internal.h> 16 #include <asm/io.h> 17 #include <asm/gpio.h> 18 #include <asm/setup.h> 19 #include <asm/arch/clock.h> 20 #include <asm/arch/cru_rk3399.h> 21 #include <asm/arch/hardware.h> 22 #include <asm/arch/grf_rk3399.h> 23 #include <asm/arch/periph.h> 24 #include <power/regulator.h> 25 #include <u-boot/sha256.h> 26 27 int board_init(void) 28 { 29 int ret; 30 31 /* 32 * We need to call into regulators_enable_boot_on() again, as the call 33 * during SPL may have not included all regulators. 34 */ 35 ret = regulators_enable_boot_on(false); 36 if (ret) 37 debug("%s: Cannot enable boot on regulator\n", __func__); 38 39 return 0; 40 } 41 42 static void rk3399_force_power_on_reset(void) 43 { 44 ofnode node; 45 struct gpio_desc sysreset_gpio; 46 47 debug("%s: trying to force a power-on reset\n", __func__); 48 49 node = ofnode_path("/config"); 50 if (!ofnode_valid(node)) { 51 debug("%s: no /config node?\n", __func__); 52 return; 53 } 54 55 if (gpio_request_by_name_nodev(node, "sysreset-gpio", 0, 56 &sysreset_gpio, GPIOD_IS_OUT)) { 57 debug("%s: could not find a /config/sysreset-gpio\n", __func__); 58 return; 59 } 60 61 dm_gpio_set_value(&sysreset_gpio, 1); 62 } 63 64 void spl_board_init(void) 65 { 66 int ret; 67 struct rk3399_cru *cru = rockchip_get_cru(); 68 69 /* 70 * The RK3399 resets only 'almost all logic' (see also in the TRM 71 * "3.9.4 Global software reset"), when issuing a software reset. 72 * This may cause issues during boot-up for some configurations of 73 * the application software stack. 74 * 75 * To work around this, we test whether the last reset reason was 76 * a power-on reset and (if not) issue an overtemp-reset to reset 77 * the entire module. 78 * 79 * While this was previously fixed by modifying the various places 80 * that could generate a software reset (e.g. U-Boot's sysreset 81 * driver, the ATF or Linux), we now have it here to ensure that 82 * we no longer have to track this through the various components. 83 */ 84 if (cru->glb_rst_st != 0) 85 rk3399_force_power_on_reset(); 86 87 /* 88 * Turning the eMMC and SPI back on (if disabled via the Qseven 89 * BIOS_ENABLE) signal is done through a always-on regulator). 90 */ 91 ret = regulators_enable_boot_on(false); 92 if (ret) 93 debug("%s: Cannot enable boot on regulator\n", __func__); 94 95 preloader_console_init(); 96 } 97 98 static void setup_macaddr(void) 99 { 100 #if CONFIG_IS_ENABLED(CMD_NET) 101 int ret; 102 const char *cpuid = env_get("cpuid#"); 103 u8 hash[SHA256_SUM_LEN]; 104 int size = sizeof(hash); 105 u8 mac_addr[6]; 106 107 /* Only generate a MAC address, if none is set in the environment */ 108 if (env_get("ethaddr")) 109 return; 110 111 if (!cpuid) { 112 debug("%s: could not retrieve 'cpuid#'\n", __func__); 113 return; 114 } 115 116 ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size); 117 if (ret) { 118 debug("%s: failed to calculate SHA256\n", __func__); 119 return; 120 } 121 122 /* Copy 6 bytes of the hash to base the MAC address on */ 123 memcpy(mac_addr, hash, 6); 124 125 /* Make this a valid MAC address and set it */ 126 mac_addr[0] &= 0xfe; /* clear multicast bit */ 127 mac_addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ 128 eth_env_set_enetaddr("ethaddr", mac_addr); 129 #endif 130 } 131 132 static void setup_serial(void) 133 { 134 #if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE) 135 const u32 cpuid_offset = 0x7; 136 const u32 cpuid_length = 0x10; 137 138 struct udevice *dev; 139 int ret, i; 140 u8 cpuid[cpuid_length]; 141 u8 low[cpuid_length/2], high[cpuid_length/2]; 142 char cpuid_str[cpuid_length * 2 + 1]; 143 u64 serialno; 144 char serialno_str[17]; 145 146 /* retrieve the device */ 147 ret = uclass_get_device_by_driver(UCLASS_MISC, 148 DM_GET_DRIVER(rockchip_efuse), &dev); 149 if (ret) { 150 debug("%s: could not find efuse device\n", __func__); 151 return; 152 } 153 154 /* read the cpu_id range from the efuses */ 155 ret = misc_read(dev, cpuid_offset, &cpuid, sizeof(cpuid)); 156 if (ret) { 157 debug("%s: reading cpuid from the efuses failed\n", 158 __func__); 159 return; 160 } 161 162 memset(cpuid_str, 0, sizeof(cpuid_str)); 163 for (i = 0; i < 16; i++) 164 sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]); 165 166 debug("cpuid: %s\n", cpuid_str); 167 168 /* 169 * Mix the cpuid bytes using the same rules as in 170 * ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c 171 */ 172 for (i = 0; i < 8; i++) { 173 low[i] = cpuid[1 + (i << 1)]; 174 high[i] = cpuid[i << 1]; 175 } 176 177 serialno = crc32_no_comp(0, low, 8); 178 serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32; 179 snprintf(serialno_str, sizeof(serialno_str), "%016llx", serialno); 180 181 env_set("cpuid#", cpuid_str); 182 env_set("serial#", serialno_str); 183 #endif 184 } 185 186 static void setup_iodomain(void) 187 { 188 const u32 GRF_IO_VSEL_GPIO4CD_SHIFT = 3; 189 struct rk3399_grf_regs *grf = 190 syscon_get_first_range(ROCKCHIP_SYSCON_GRF); 191 192 /* 193 * Set bit 3 in GRF_IO_VSEL so PCIE_RST# works (pin GPIO4_C6). 194 * Linux assumes that PCIE_RST# works out of the box as it probes 195 * PCIe before loading the iodomain driver. 196 */ 197 rk_setreg(&grf->io_vsel, 1 << GRF_IO_VSEL_GPIO4CD_SHIFT); 198 } 199 200 int misc_init_r(void) 201 { 202 setup_serial(); 203 setup_macaddr(); 204 setup_iodomain(); 205 206 return 0; 207 } 208 209 #ifdef CONFIG_SERIAL_TAG 210 void get_board_serial(struct tag_serialnr *serialnr) 211 { 212 char *serial_string; 213 u64 serial = 0; 214 215 serial_string = env_get("serial#"); 216 217 if (serial_string) 218 serial = simple_strtoull(serial_string, NULL, 16); 219 220 serialnr->high = (u32)(serial >> 32); 221 serialnr->low = (u32)(serial & 0xffffffff); 222 } 223 #endif 224 225 /** 226 * Switch power at an external regulator (for our root hub). 227 * 228 * @param ctrl pointer to the xHCI controller 229 * @param port port number as in the control message (one-based) 230 * @param enable boolean indicating whether to enable or disable power 231 * @return returns 0 on success, an error-code on failure 232 */ 233 static int board_usb_port_power_set(struct udevice *dev, int port, 234 bool enable) 235 { 236 #if CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_REGULATOR) 237 /* We start counting ports at 0, while USB counts from 1. */ 238 int index = port - 1; 239 const char *regname = NULL; 240 struct udevice *regulator; 241 const char *prop = "tsd,usb-port-power"; 242 int ret; 243 244 debug("%s: ctrl '%s' port %d enable %s\n", __func__, 245 dev_read_name(dev), port, enable ? "true" : "false"); 246 247 ret = dev_read_string_index(dev, prop, index, ®name); 248 if (ret < 0) { 249 debug("%s: ctrl '%s' port %d: no entry in '%s'\n", 250 __func__, dev_read_name(dev), port, prop); 251 return ret; 252 } 253 254 ret = regulator_get_by_platname(regname, ®ulator); 255 if (ret) { 256 debug("%s: ctrl '%s' port %d: could not get regulator '%s'\n", 257 __func__, dev_read_name(dev), port, regname); 258 return ret; 259 } 260 261 regulator_set_enable(regulator, enable); 262 return 0; 263 #else 264 return -ENOTSUPP; 265 #endif 266 } 267 268 void usb_hub_reset_devices(struct usb_hub_device *hub, int port) 269 { 270 struct udevice *dev = hub->pusb_dev->dev; 271 struct udevice *ctrl; 272 273 /* We are only interested in our root-hubs */ 274 if (usb_hub_is_root_hub(dev) == false) 275 return; 276 277 ctrl = usb_get_bus(dev); 278 if (!ctrl) { 279 debug("%s: could not retrieve ctrl for hub\n", __func__); 280 return; 281 } 282 283 /* 284 * To work around an incompatibility between the single-threaded 285 * USB stack in U-Boot and (a strange low-power mode of) the USB 286 * hub we have on-module, we need to delay powering on the hub 287 * until the first time the port is probed. 288 */ 289 board_usb_port_power_set(ctrl, port, true); 290 } 291