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 <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 DECLARE_GLOBAL_DATA_PTR; 27 28 int board_init(void) 29 { 30 int ret; 31 32 /* 33 * We need to call into regulators_enable_boot_on() again, as the call 34 * during SPL may have not included all regulators. 35 */ 36 ret = regulators_enable_boot_on(false); 37 if (ret) 38 debug("%s: Cannot enable boot on regulator\n", __func__); 39 40 return 0; 41 } 42 43 static void rk3399_force_power_on_reset(void) 44 { 45 ofnode node; 46 struct gpio_desc sysreset_gpio; 47 48 debug("%s: trying to force a power-on reset\n", __func__); 49 50 node = ofnode_path("/config"); 51 if (!ofnode_valid(node)) { 52 debug("%s: no /config node?\n", __func__); 53 return; 54 } 55 56 if (gpio_request_by_name_nodev(node, "sysreset-gpio", 0, 57 &sysreset_gpio, GPIOD_IS_OUT)) { 58 debug("%s: could not find a /config/sysreset-gpio\n", __func__); 59 return; 60 } 61 62 dm_gpio_set_value(&sysreset_gpio, 1); 63 } 64 65 void spl_board_init(void) 66 { 67 int ret; 68 struct rk3399_cru *cru = rockchip_get_cru(); 69 70 /* 71 * The RK3399 resets only 'almost all logic' (see also in the TRM 72 * "3.9.4 Global software reset"), when issuing a software reset. 73 * This may cause issues during boot-up for some configurations of 74 * the application software stack. 75 * 76 * To work around this, we test whether the last reset reason was 77 * a power-on reset and (if not) issue an overtemp-reset to reset 78 * the entire module. 79 * 80 * While this was previously fixed by modifying the various places 81 * that could generate a software reset (e.g. U-Boot's sysreset 82 * driver, the ATF or Linux), we now have it here to ensure that 83 * we no longer have to track this through the various components. 84 */ 85 if (cru->glb_rst_st != 0) 86 rk3399_force_power_on_reset(); 87 88 /* 89 * Turning the eMMC and SPI back on (if disabled via the Qseven 90 * BIOS_ENABLE) signal is done through a always-on regulator). 91 */ 92 ret = regulators_enable_boot_on(false); 93 if (ret) 94 debug("%s: Cannot enable boot on regulator\n", __func__); 95 96 preloader_console_init(); 97 } 98 99 static void setup_macaddr(void) 100 { 101 #if CONFIG_IS_ENABLED(CMD_NET) 102 int ret; 103 const char *cpuid = env_get("cpuid#"); 104 u8 hash[SHA256_SUM_LEN]; 105 int size = sizeof(hash); 106 u8 mac_addr[6]; 107 108 /* Only generate a MAC address, if none is set in the environment */ 109 if (env_get("ethaddr")) 110 return; 111 112 if (!cpuid) { 113 debug("%s: could not retrieve 'cpuid#'\n", __func__); 114 return; 115 } 116 117 ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size); 118 if (ret) { 119 debug("%s: failed to calculate SHA256\n", __func__); 120 return; 121 } 122 123 /* Copy 6 bytes of the hash to base the MAC address on */ 124 memcpy(mac_addr, hash, 6); 125 126 /* Make this a valid MAC address and set it */ 127 mac_addr[0] &= 0xfe; /* clear multicast bit */ 128 mac_addr[0] |= 0x02; /* set local assignment bit (IEEE802) */ 129 eth_env_set_enetaddr("ethaddr", mac_addr); 130 #endif 131 } 132 133 static void setup_serial(void) 134 { 135 #if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE) 136 const u32 cpuid_offset = 0x7; 137 const u32 cpuid_length = 0x10; 138 139 struct udevice *dev; 140 int ret, i; 141 u8 cpuid[cpuid_length]; 142 u8 low[cpuid_length/2], high[cpuid_length/2]; 143 char cpuid_str[cpuid_length * 2 + 1]; 144 u64 serialno; 145 char serialno_str[17]; 146 147 /* retrieve the device */ 148 ret = uclass_get_device_by_driver(UCLASS_MISC, 149 DM_GET_DRIVER(rockchip_efuse), &dev); 150 if (ret) { 151 debug("%s: could not find efuse device\n", __func__); 152 return; 153 } 154 155 /* read the cpu_id range from the efuses */ 156 ret = misc_read(dev, cpuid_offset, &cpuid, sizeof(cpuid)); 157 if (ret) { 158 debug("%s: reading cpuid from the efuses failed\n", 159 __func__); 160 return; 161 } 162 163 memset(cpuid_str, 0, sizeof(cpuid_str)); 164 for (i = 0; i < 16; i++) 165 sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]); 166 167 debug("cpuid: %s\n", cpuid_str); 168 169 /* 170 * Mix the cpuid bytes using the same rules as in 171 * ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c 172 */ 173 for (i = 0; i < 8; i++) { 174 low[i] = cpuid[1 + (i << 1)]; 175 high[i] = cpuid[i << 1]; 176 } 177 178 serialno = crc32_no_comp(0, low, 8); 179 serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32; 180 snprintf(serialno_str, sizeof(serialno_str), "%016llx", serialno); 181 182 env_set("cpuid#", cpuid_str); 183 env_set("serial#", serialno_str); 184 #endif 185 } 186 187 static void setup_iodomain(void) 188 { 189 const u32 GRF_IO_VSEL_GPIO4CD_SHIFT = 3; 190 struct rk3399_grf_regs *grf = 191 syscon_get_first_range(ROCKCHIP_SYSCON_GRF); 192 193 /* 194 * Set bit 3 in GRF_IO_VSEL so PCIE_RST# works (pin GPIO4_C6). 195 * Linux assumes that PCIE_RST# works out of the box as it probes 196 * PCIe before loading the iodomain driver. 197 */ 198 rk_setreg(&grf->io_vsel, 1 << GRF_IO_VSEL_GPIO4CD_SHIFT); 199 } 200 201 int misc_init_r(void) 202 { 203 setup_serial(); 204 setup_macaddr(); 205 setup_iodomain(); 206 207 return 0; 208 } 209 210 #ifdef CONFIG_SERIAL_TAG 211 void get_board_serial(struct tag_serialnr *serialnr) 212 { 213 char *serial_string; 214 u64 serial = 0; 215 216 serial_string = env_get("serial#"); 217 218 if (serial_string) 219 serial = simple_strtoull(serial_string, NULL, 16); 220 221 serialnr->high = (u32)(serial >> 32); 222 serialnr->low = (u32)(serial & 0xffffffff); 223 } 224 #endif 225 226 /** 227 * Switch power at an external regulator (for our root hub). 228 * 229 * @param ctrl pointer to the xHCI controller 230 * @param port port number as in the control message (one-based) 231 * @param enable boolean indicating whether to enable or disable power 232 * @return returns 0 on success, an error-code on failure 233 */ 234 static int board_usb_port_power_set(struct udevice *dev, int port, 235 bool enable) 236 { 237 #if CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_REGULATOR) 238 /* We start counting ports at 0, while USB counts from 1. */ 239 int index = port - 1; 240 const char *regname = NULL; 241 struct udevice *regulator; 242 const char *prop = "tsd,usb-port-power"; 243 int ret; 244 245 debug("%s: ctrl '%s' port %d enable %s\n", __func__, 246 dev_read_name(dev), port, enable ? "true" : "false"); 247 248 ret = dev_read_string_index(dev, prop, index, ®name); 249 if (ret < 0) { 250 debug("%s: ctrl '%s' port %d: no entry in '%s'\n", 251 __func__, dev_read_name(dev), port, prop); 252 return ret; 253 } 254 255 ret = regulator_get_by_platname(regname, ®ulator); 256 if (ret) { 257 debug("%s: ctrl '%s' port %d: could not get regulator '%s'\n", 258 __func__, dev_read_name(dev), port, regname); 259 return ret; 260 } 261 262 regulator_set_enable(regulator, enable); 263 return 0; 264 #else 265 return -ENOTSUPP; 266 #endif 267 } 268 269 void usb_hub_reset_devices(struct usb_hub_device *hub, int port) 270 { 271 struct udevice *dev = hub->pusb_dev->dev; 272 struct udevice *ctrl; 273 274 /* We are only interested in our root-hubs */ 275 if (usb_hub_is_root_hub(dev) == false) 276 return; 277 278 ctrl = usb_get_bus(dev); 279 if (!ctrl) { 280 debug("%s: could not retrieve ctrl for hub\n", __func__); 281 return; 282 } 283 284 /* 285 * To work around an incompatibility between the single-threaded 286 * USB stack in U-Boot and (a strange low-power mode of) the USB 287 * hub we have on-module, we need to delay powering on the hub 288 * until the first time the port is probed. 289 */ 290 board_usb_port_power_set(ctrl, port, true); 291 } 292