1 /* 2 * Copyright (C) 2012-2017 Altera Corporation <www.altera.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <asm/io.h> 9 #include <errno.h> 10 #include <fdtdec.h> 11 #include <linux/libfdt.h> 12 #include <altera.h> 13 #include <miiphy.h> 14 #include <netdev.h> 15 #include <watchdog.h> 16 #include <asm/arch/misc.h> 17 #include <asm/arch/reset_manager.h> 18 #include <asm/arch/scan_manager.h> 19 #include <asm/arch/sdram.h> 20 #include <asm/arch/system_manager.h> 21 #include <asm/arch/nic301.h> 22 #include <asm/arch/scu.h> 23 #include <asm/pl310.h> 24 25 #include <dt-bindings/reset/altr,rst-mgr.h> 26 27 DECLARE_GLOBAL_DATA_PTR; 28 29 static struct pl310_regs *const pl310 = 30 (struct pl310_regs *)CONFIG_SYS_PL310_BASE; 31 static struct socfpga_system_manager *sysmgr_regs = 32 (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS; 33 static struct nic301_registers *nic301_regs = 34 (struct nic301_registers *)SOCFPGA_L3REGS_ADDRESS; 35 static struct scu_registers *scu_regs = 36 (struct scu_registers *)SOCFPGA_MPUSCU_ADDRESS; 37 38 /* 39 * DesignWare Ethernet initialization 40 */ 41 #ifdef CONFIG_ETH_DESIGNWARE 42 void dwmac_deassert_reset(const unsigned int of_reset_id, 43 const u32 phymode) 44 { 45 u32 physhift, reset; 46 47 if (of_reset_id == EMAC0_RESET) { 48 physhift = SYSMGR_EMACGRP_CTRL_PHYSEL0_LSB; 49 reset = SOCFPGA_RESET(EMAC0); 50 } else if (of_reset_id == EMAC1_RESET) { 51 physhift = SYSMGR_EMACGRP_CTRL_PHYSEL1_LSB; 52 reset = SOCFPGA_RESET(EMAC1); 53 } else { 54 printf("GMAC: Invalid reset ID (%i)!\n", of_reset_id); 55 return; 56 } 57 58 /* configure to PHY interface select choosed */ 59 clrsetbits_le32(&sysmgr_regs->emacgrp_ctrl, 60 SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << physhift, 61 phymode << physhift); 62 63 /* Release the EMAC controller from reset */ 64 socfpga_per_reset(reset, 0); 65 } 66 67 static u32 dwmac_phymode_to_modereg(const char *phymode, u32 *modereg) 68 { 69 if (!phymode) 70 return -EINVAL; 71 72 if (!strcmp(phymode, "mii") || !strcmp(phymode, "gmii")) { 73 *modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII; 74 return 0; 75 } 76 77 if (!strcmp(phymode, "rgmii")) { 78 *modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII; 79 return 0; 80 } 81 82 if (!strcmp(phymode, "rmii")) { 83 *modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII; 84 return 0; 85 } 86 87 return -EINVAL; 88 } 89 90 static int socfpga_eth_reset(void) 91 { 92 const void *fdt = gd->fdt_blob; 93 struct fdtdec_phandle_args args; 94 const char *phy_mode; 95 u32 phy_modereg; 96 int nodes[2]; /* Max. two GMACs */ 97 int ret, count; 98 int i, node; 99 100 /* Put both GMACs into RESET state. */ 101 socfpga_per_reset(SOCFPGA_RESET(EMAC0), 1); 102 socfpga_per_reset(SOCFPGA_RESET(EMAC1), 1); 103 104 count = fdtdec_find_aliases_for_id(fdt, "ethernet", 105 COMPAT_ALTERA_SOCFPGA_DWMAC, 106 nodes, ARRAY_SIZE(nodes)); 107 for (i = 0; i < count; i++) { 108 node = nodes[i]; 109 if (node <= 0) 110 continue; 111 112 ret = fdtdec_parse_phandle_with_args(fdt, node, "resets", 113 "#reset-cells", 1, 0, 114 &args); 115 if (ret || (args.args_count != 1)) { 116 debug("GMAC%i: Failed to parse DT 'resets'!\n", i); 117 continue; 118 } 119 120 phy_mode = fdt_getprop(fdt, node, "phy-mode", NULL); 121 ret = dwmac_phymode_to_modereg(phy_mode, &phy_modereg); 122 if (ret) { 123 debug("GMAC%i: Failed to parse DT 'phy-mode'!\n", i); 124 continue; 125 } 126 127 dwmac_deassert_reset(args.args[0], phy_modereg); 128 } 129 130 return 0; 131 } 132 #else 133 static int socfpga_eth_reset(void) 134 { 135 return 0; 136 }; 137 #endif 138 139 static const struct { 140 const u16 pn; 141 const char *name; 142 const char *var; 143 } socfpga_fpga_model[] = { 144 /* Cyclone V E */ 145 { 0x2b15, "Cyclone V, E/A2", "cv_e_a2" }, 146 { 0x2b05, "Cyclone V, E/A4", "cv_e_a4" }, 147 { 0x2b22, "Cyclone V, E/A5", "cv_e_a5" }, 148 { 0x2b13, "Cyclone V, E/A7", "cv_e_a7" }, 149 { 0x2b14, "Cyclone V, E/A9", "cv_e_a9" }, 150 /* Cyclone V GX/GT */ 151 { 0x2b01, "Cyclone V, GX/C3", "cv_gx_c3" }, 152 { 0x2b12, "Cyclone V, GX/C4", "cv_gx_c4" }, 153 { 0x2b02, "Cyclone V, GX/C5 or GT/D5", "cv_gx_c5" }, 154 { 0x2b03, "Cyclone V, GX/C7 or GT/D7", "cv_gx_c7" }, 155 { 0x2b04, "Cyclone V, GX/C9 or GT/D9", "cv_gx_c9" }, 156 /* Cyclone V SE/SX/ST */ 157 { 0x2d11, "Cyclone V, SE/A2 or SX/C2", "cv_se_a2" }, 158 { 0x2d01, "Cyclone V, SE/A4 or SX/C4", "cv_se_a4" }, 159 { 0x2d12, "Cyclone V, SE/A5 or SX/C5 or ST/D5", "cv_se_a5" }, 160 { 0x2d02, "Cyclone V, SE/A6 or SX/C6 or ST/D6", "cv_se_a6" }, 161 /* Arria V */ 162 { 0x2d03, "Arria V, D5", "av_d5" }, 163 }; 164 165 static int socfpga_fpga_id(const bool print_id) 166 { 167 const u32 altera_mi = 0x6e; 168 const u32 id = scan_mgr_get_fpga_id(); 169 170 const u32 lsb = id & 0x00000001; 171 const u32 mi = (id >> 1) & 0x000007ff; 172 const u32 pn = (id >> 12) & 0x0000ffff; 173 const u32 version = (id >> 28) & 0x0000000f; 174 int i; 175 176 if ((mi != altera_mi) || (lsb != 1)) { 177 printf("FPGA: Not Altera chip ID\n"); 178 return -EINVAL; 179 } 180 181 for (i = 0; i < ARRAY_SIZE(socfpga_fpga_model); i++) 182 if (pn == socfpga_fpga_model[i].pn) 183 break; 184 185 if (i == ARRAY_SIZE(socfpga_fpga_model)) { 186 printf("FPGA: Unknown Altera chip, ID 0x%08x\n", id); 187 return -EINVAL; 188 } 189 190 if (print_id) 191 printf("FPGA: Altera %s, version 0x%01x\n", 192 socfpga_fpga_model[i].name, version); 193 return i; 194 } 195 196 /* 197 * Print CPU information 198 */ 199 #if defined(CONFIG_DISPLAY_CPUINFO) 200 int print_cpuinfo(void) 201 { 202 const u32 bsel = 203 SYSMGR_GET_BOOTINFO_BSEL(readl(&sysmgr_regs->bootinfo)); 204 205 puts("CPU: Altera SoCFPGA Platform\n"); 206 socfpga_fpga_id(1); 207 208 printf("BOOT: %s\n", bsel_str[bsel].name); 209 return 0; 210 } 211 #endif 212 213 #ifdef CONFIG_ARCH_MISC_INIT 214 int arch_misc_init(void) 215 { 216 const u32 bsel = readl(&sysmgr_regs->bootinfo) & 0x7; 217 const int fpga_id = socfpga_fpga_id(0); 218 env_set("bootmode", bsel_str[bsel].mode); 219 if (fpga_id >= 0) 220 env_set("fpgatype", socfpga_fpga_model[fpga_id].var); 221 return socfpga_eth_reset(); 222 } 223 #endif 224 225 /* 226 * Convert all NIC-301 AMBA slaves from secure to non-secure 227 */ 228 static void socfpga_nic301_slave_ns(void) 229 { 230 writel(0x1, &nic301_regs->lwhps2fpgaregs); 231 writel(0x1, &nic301_regs->hps2fpgaregs); 232 writel(0x1, &nic301_regs->acp); 233 writel(0x1, &nic301_regs->rom); 234 writel(0x1, &nic301_regs->ocram); 235 writel(0x1, &nic301_regs->sdrdata); 236 } 237 238 static u32 iswgrp_handoff[8]; 239 240 int arch_early_init_r(void) 241 { 242 int i; 243 244 /* 245 * Write magic value into magic register to unlock support for 246 * issuing warm reset. The ancient kernel code expects this 247 * value to be written into the register by the bootloader, so 248 * to support that old code, we write it here instead of in the 249 * reset_cpu() function just before resetting the CPU. 250 */ 251 writel(0xae9efebc, &sysmgr_regs->romcodegrp_warmramgrp_enable); 252 253 for (i = 0; i < 8; i++) /* Cache initial SW setting regs */ 254 iswgrp_handoff[i] = readl(&sysmgr_regs->iswgrp_handoff[i]); 255 256 socfpga_bridges_reset(1); 257 258 socfpga_nic301_slave_ns(); 259 260 /* 261 * Private components security: 262 * U-Boot : configure private timer, global timer and cpu component 263 * access as non secure for kernel stage (as required by Linux) 264 */ 265 setbits_le32(&scu_regs->sacr, 0xfff); 266 267 /* Configure the L2 controller to make SDRAM start at 0 */ 268 #ifdef CONFIG_SOCFPGA_VIRTUAL_TARGET 269 writel(0x2, &nic301_regs->remap); 270 #else 271 writel(0x1, &nic301_regs->remap); /* remap.mpuzero */ 272 writel(0x1, &pl310->pl310_addr_filter_start); 273 #endif 274 275 /* Add device descriptor to FPGA device table */ 276 socfpga_fpga_add(); 277 278 #ifdef CONFIG_DESIGNWARE_SPI 279 /* Get Designware SPI controller out of reset */ 280 socfpga_per_reset(SOCFPGA_RESET(SPIM0), 0); 281 socfpga_per_reset(SOCFPGA_RESET(SPIM1), 0); 282 #endif 283 284 #ifdef CONFIG_NAND_DENALI 285 socfpga_per_reset(SOCFPGA_RESET(NAND), 0); 286 #endif 287 288 return 0; 289 } 290 291 #ifndef CONFIG_SPL_BUILD 292 static struct socfpga_reset_manager *reset_manager_base = 293 (struct socfpga_reset_manager *)SOCFPGA_RSTMGR_ADDRESS; 294 static struct socfpga_sdr_ctrl *sdr_ctrl = 295 (struct socfpga_sdr_ctrl *)SDR_CTRLGRP_ADDRESS; 296 297 static void socfpga_sdram_apply_static_cfg(void) 298 { 299 const u32 applymask = 0x8; 300 u32 val = readl(&sdr_ctrl->static_cfg) | applymask; 301 302 /* 303 * SDRAM staticcfg register specific: 304 * When applying the register setting, the CPU must not access 305 * SDRAM. Luckily for us, we can abuse i-cache here to help us 306 * circumvent the SDRAM access issue. The idea is to make sure 307 * that the code is in one full i-cache line by branching past 308 * it and back. Once it is in the i-cache, we execute the core 309 * of the code and apply the register settings. 310 * 311 * The code below uses 7 instructions, while the Cortex-A9 has 312 * 32-byte cachelines, thus the limit is 8 instructions total. 313 */ 314 asm volatile( 315 ".align 5 \n" 316 " b 2f \n" 317 "1: str %0, [%1] \n" 318 " dsb \n" 319 " isb \n" 320 " b 3f \n" 321 "2: b 1b \n" 322 "3: nop \n" 323 : : "r"(val), "r"(&sdr_ctrl->static_cfg) : "memory", "cc"); 324 } 325 326 static int do_bridge(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 327 { 328 if (argc != 2) 329 return CMD_RET_USAGE; 330 331 argv++; 332 333 switch (*argv[0]) { 334 case 'e': /* Enable */ 335 writel(iswgrp_handoff[2], &sysmgr_regs->fpgaintfgrp_module); 336 socfpga_sdram_apply_static_cfg(); 337 writel(iswgrp_handoff[3], &sdr_ctrl->fpgaport_rst); 338 writel(iswgrp_handoff[0], &reset_manager_base->brg_mod_reset); 339 writel(iswgrp_handoff[1], &nic301_regs->remap); 340 break; 341 case 'd': /* Disable */ 342 writel(0, &sysmgr_regs->fpgaintfgrp_module); 343 writel(0, &sdr_ctrl->fpgaport_rst); 344 socfpga_sdram_apply_static_cfg(); 345 writel(0, &reset_manager_base->brg_mod_reset); 346 writel(1, &nic301_regs->remap); 347 break; 348 default: 349 return CMD_RET_USAGE; 350 } 351 352 return 0; 353 } 354 355 U_BOOT_CMD( 356 bridge, 2, 1, do_bridge, 357 "SoCFPGA HPS FPGA bridge control", 358 "enable - Enable HPS-to-FPGA, FPGA-to-HPS, LWHPS-to-FPGA bridges\n" 359 "bridge disable - Enable HPS-to-FPGA, FPGA-to-HPS, LWHPS-to-FPGA bridges\n" 360 "" 361 ); 362 #endif 363