arch/arm/mach-socfpga/misc.c

   1 /*
   2  *  Copyright (C) 2012 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 <libfdt.h>
  12 #include <altera.h>
  13 #include <miiphy.h>
  14 #include <netdev.h>
  15 #include <watchdog.h>
  16 #include <asm/arch/reset_manager.h>
  17 #include <asm/arch/scan_manager.h>
  18 #include <asm/arch/system_manager.h>
  19 #include <asm/arch/nic301.h>
  20 #include <asm/arch/scu.h>
  21 #include <asm/pl310.h>
  22
  23 #include <dt-bindings/reset/altr,rst-mgr.h>
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 static struct pl310_regs *const pl310 =
  28         (struct pl310_regs *)CONFIG_SYS_PL310_BASE;
  29 static struct socfpga_system_manager *sysmgr_regs =
  30         (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
  31 static struct socfpga_reset_manager *reset_manager_base =
  32         (struct socfpga_reset_manager *)SOCFPGA_RSTMGR_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 int dram_init(void)
  39 {
  40         gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
  41         return 0;
  42 }
  43
  44 void enable_caches(void)
  45 {
  46 #ifndef CONFIG_SYS_ICACHE_OFF
  47         icache_enable();
  48 #endif
  49 #ifndef CONFIG_SYS_DCACHE_OFF
  50         dcache_enable();
  51 #endif
  52 }
  53
  54 void v7_outer_cache_enable(void)
  55 {
  56         /* Disable the L2 cache */
  57         clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
  58
  59         /* enable BRESP, instruction and data prefetch, full line of zeroes */
  60         setbits_le32(&pl310->pl310_aux_ctrl,
  61                      L310_AUX_CTRL_DATA_PREFETCH_MASK |
  62                      L310_AUX_CTRL_INST_PREFETCH_MASK |
  63                      L310_SHARED_ATT_OVERRIDE_ENABLE);
  64
  65         /* Enable the L2 cache */
  66         setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
  67 }
  68
  69 void v7_outer_cache_disable(void)
  70 {
  71         /* Disable the L2 cache */
  72         clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
  73 }
  74
  75 /*
  76  * DesignWare Ethernet initialization
  77  */
  78 #ifdef CONFIG_ETH_DESIGNWARE
  79 static void dwmac_deassert_reset(const unsigned int of_reset_id,
  80                                  const u32 phymode)
  81 {
  82         u32 physhift, reset;
  83
  84         if (of_reset_id == EMAC0_RESET) {
  85                 physhift = SYSMGR_EMACGRP_CTRL_PHYSEL0_LSB;
  86                 reset = SOCFPGA_RESET(EMAC0);
  87         } else if (of_reset_id == EMAC1_RESET) {
  88                 physhift = SYSMGR_EMACGRP_CTRL_PHYSEL1_LSB;
  89                 reset = SOCFPGA_RESET(EMAC1);
  90         } else {
  91                 printf("GMAC: Invalid reset ID (%i)!\n", of_reset_id);
  92                 return;
  93         }
  94
  95         /* Clearing emac0 PHY interface select to 0 */
  96         clrbits_le32(&sysmgr_regs->emacgrp_ctrl,
  97                      SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << physhift);
  98
  99         /* configure to PHY interface select choosed */
 100         setbits_le32(&sysmgr_regs->emacgrp_ctrl,
 101                      phymode << physhift);
 102
 103         /* Release the EMAC controller from reset */
 104         socfpga_per_reset(reset, 0);
 105 }
 106
 107 static u32 dwmac_phymode_to_modereg(const char *phymode, u32 *modereg)
 108 {
 109         if (!phymode)
 110                 return -EINVAL;
 111
 112         if (!strcmp(phymode, "mii") || !strcmp(phymode, "gmii")) {
 113                 *modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
 114                 return 0;
 115         }
 116
 117         if (!strcmp(phymode, "rgmii")) {
 118                 *modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII;
 119                 return 0;
 120         }
 121
 122         if (!strcmp(phymode, "rmii")) {
 123                 *modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII;
 124                 return 0;
 125         }
 126
 127         return -EINVAL;
 128 }
 129
 130 static int socfpga_eth_reset(void)
 131 {
 132         const void *fdt = gd->fdt_blob;
 133         struct fdtdec_phandle_args args;
 134         const char *phy_mode;
 135         u32 phy_modereg;
 136         int nodes[2];   /* Max. two GMACs */
 137         int ret, count;
 138         int i, node;
 139
 140         /* Put both GMACs into RESET state. */
 141         socfpga_per_reset(SOCFPGA_RESET(EMAC0), 1);
 142         socfpga_per_reset(SOCFPGA_RESET(EMAC1), 1);
 143
 144         count = fdtdec_find_aliases_for_id(fdt, "ethernet",
 145                                            COMPAT_ALTERA_SOCFPGA_DWMAC,
 146                                            nodes, ARRAY_SIZE(nodes));
 147         for (i = 0; i < count; i++) {
 148                 node = nodes[i];
 149                 if (node <= 0)
 150                         continue;
 151
 152                 ret = fdtdec_parse_phandle_with_args(fdt, node, "resets",
 153                                                      "#reset-cells", 1, 0,
 154                                                      &args);
 155                 if (ret || (args.args_count != 1)) {
 156                         debug("GMAC%i: Failed to parse DT 'resets'!\n", i);
 157                         continue;
 158                 }
 159
 160                 phy_mode = fdt_getprop(fdt, node, "phy-mode", NULL);
 161                 ret = dwmac_phymode_to_modereg(phy_mode, &phy_modereg);
 162                 if (ret) {
 163                         debug("GMAC%i: Failed to parse DT 'phy-mode'!\n", i);
 164                         continue;
 165                 }
 166
 167                 dwmac_deassert_reset(args.args[0], phy_modereg);
 168         }
 169
 170         return 0;
 171 }
 172 #else
 173 static int socfpga_eth_reset(void)
 174 {
 175         return 0;
 176 };
 177 #endif
 178
 179 struct {
 180         const char      *mode;
 181         const char      *name;
 182 } bsel_str[] = {
 183         { "rsvd", "Reserved", },
 184         { "fpga", "FPGA (HPS2FPGA Bridge)", },
 185         { "nand", "NAND Flash (1.8V)", },
 186         { "nand", "NAND Flash (3.0V)", },
 187         { "sd", "SD/MMC External Transceiver (1.8V)", },
 188         { "sd", "SD/MMC Internal Transceiver (3.0V)", },
 189         { "qspi", "QSPI Flash (1.8V)", },
 190         { "qspi", "QSPI Flash (3.0V)", },
 191 };
 192
 193 static const struct {
 194         const u16       pn;
 195         const char      *name;
 196         const char      *var;
 197 } const socfpga_fpga_model[] = {
 198         /* Cyclone V E */
 199         { 0x2b15, "Cyclone V, E/A2", "cv_e_a2" },
 200         { 0x2b05, "Cyclone V, E/A4", "cv_e_a4" },
 201         { 0x2b22, "Cyclone V, E/A5", "cv_e_a5" },
 202         { 0x2b13, "Cyclone V, E/A7", "cv_e_a7" },
 203         { 0x2b14, "Cyclone V, E/A9", "cv_e_a9" },
 204         /* Cyclone V GX/GT */
 205         { 0x2b01, "Cyclone V, GX/C3", "cv_gx_c3" },
 206         { 0x2b12, "Cyclone V, GX/C4", "cv_gx_c4" },
 207         { 0x2b02, "Cyclone V, GX/C5 or GT/D5", "cv_gx_c5" },
 208         { 0x2b03, "Cyclone V, GX/C7 or GT/D7", "cv_gx_c7" },
 209         { 0x2b04, "Cyclone V, GX/C9 or GT/D9", "cv_gx_c9" },
 210         /* Cyclone V SE/SX/ST */
 211         { 0x2d11, "Cyclone V, SE/A2 or SX/C2", "cv_se_a2" },
 212         { 0x2d01, "Cyclone V, SE/A4 or SX/C4", "cv_se_a4" },
 213         { 0x2d12, "Cyclone V, SE/A5 or SX/C5 or ST/D5", "cv_se_a5" },
 214         { 0x2d02, "Cyclone V, SE/A6 or SX/C6 or ST/D6", "cv_se_a6" },
 215         /* Arria V */
 216         { 0x2d03, "Arria V, D5", "av_d5" },
 217 };
 218
 219 static int socfpga_fpga_id(const bool print_id)
 220 {
 221         const u32 altera_mi = 0x6e;
 222         const u32 id = scan_mgr_get_fpga_id();
 223
 224         const u32 lsb = id & 0x00000001;
 225         const u32 mi = (id >> 1) & 0x000007ff;
 226         const u32 pn = (id >> 12) & 0x0000ffff;
 227         const u32 version = (id >> 28) & 0x0000000f;
 228         int i;
 229
 230         if ((mi != altera_mi) || (lsb != 1)) {
 231                 printf("FPGA:  Not Altera chip ID\n");
 232                 return -EINVAL;
 233         }
 234
 235         for (i = 0; i < ARRAY_SIZE(socfpga_fpga_model); i++)
 236                 if (pn == socfpga_fpga_model[i].pn)
 237                         break;
 238
 239         if (i == ARRAY_SIZE(socfpga_fpga_model)) {
 240                 printf("FPGA:  Unknown Altera chip, ID 0x%08x\n", id);
 241                 return -EINVAL;
 242         }
 243
 244         if (print_id)
 245                 printf("FPGA:  Altera %s, version 0x%01x\n",
 246                        socfpga_fpga_model[i].name, version);
 247         return i;
 248 }
 249
 250 /*
 251  * Print CPU information
 252  */
 253 #if defined(CONFIG_DISPLAY_CPUINFO)
 254 int print_cpuinfo(void)
 255 {
 256         const u32 bsel = readl(&sysmgr_regs->bootinfo) & 0x7;
 257         puts("CPU:   Altera SoCFPGA Platform\n");
 258         socfpga_fpga_id(1);
 259         printf("BOOT:  %s\n", bsel_str[bsel].name);
 260         return 0;
 261 }
 262 #endif
 263
 264 #ifdef CONFIG_ARCH_MISC_INIT
 265 int arch_misc_init(void)
 266 {
 267         const u32 bsel = readl(&sysmgr_regs->bootinfo) & 0x7;
 268         const int fpga_id = socfpga_fpga_id(0);
 269         setenv("bootmode", bsel_str[bsel].mode);
 270         if (fpga_id >= 0)
 271                 setenv("fpgatype", socfpga_fpga_model[fpga_id].var);
 272         return socfpga_eth_reset();
 273 }
 274 #endif
 275
 276 #if defined(CONFIG_SYS_CONSOLE_IS_IN_ENV) && \
 277 defined(CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE)
 278 int overwrite_console(void)
 279 {
 280         return 0;
 281 }
 282 #endif
 283
 284 #ifdef CONFIG_FPGA
 285 /*
 286  * FPGA programming support for SoC FPGA Cyclone V
 287  */
 288 static Altera_desc altera_fpga[] = {
 289         {
 290                 /* Family */
 291                 Altera_SoCFPGA,
 292                 /* Interface type */
 293                 fast_passive_parallel,
 294                 /* No limitation as additional data will be ignored */
 295                 -1,
 296                 /* No device function table */
 297                 NULL,
 298                 /* Base interface address specified in driver */
 299                 NULL,
 300                 /* No cookie implementation */
 301                 0
 302         },
 303 };
 304
 305 /* add device descriptor to FPGA device table */
 306 static void socfpga_fpga_add(void)
 307 {
 308         int i;
 309         fpga_init();
 310         for (i = 0; i < ARRAY_SIZE(altera_fpga); i++)
 311                 fpga_add(fpga_altera, &altera_fpga[i]);
 312 }
 313 #else
 314 static inline void socfpga_fpga_add(void) {}
 315 #endif
 316
 317 int arch_cpu_init(void)
 318 {
 319 #ifdef CONFIG_HW_WATCHDOG
 320         /*
 321          * In case the watchdog is enabled, make sure to (re-)configure it
 322          * so that the defined timeout is valid. Otherwise the SPL (Perloader)
 323          * timeout value is still active which might too short for Linux
 324          * booting.
 325          */
 326         hw_watchdog_init();
 327 #else
 328         /*
 329          * If the HW watchdog is NOT enabled, make sure it is not running,
 330          * for example because it was enabled in the preloader. This might
 331          * trigger a watchdog-triggered reboot of Linux kernel later.
 332          * Toggle watchdog reset, so watchdog in not running state.
 333          */
 334         socfpga_per_reset(SOCFPGA_RESET(L4WD0), 1);
 335         socfpga_per_reset(SOCFPGA_RESET(L4WD0), 0);
 336 #endif
 337
 338         return 0;
 339 }
 340
 341 /*
 342  * Convert all NIC-301 AMBA slaves from secure to non-secure
 343  */
 344 static void socfpga_nic301_slave_ns(void)
 345 {
 346         writel(0x1, &nic301_regs->lwhps2fpgaregs);
 347         writel(0x1, &nic301_regs->hps2fpgaregs);
 348         writel(0x1, &nic301_regs->acp);
 349         writel(0x1, &nic301_regs->rom);
 350         writel(0x1, &nic301_regs->ocram);
 351         writel(0x1, &nic301_regs->sdrdata);
 352 }
 353
 354 static uint32_t iswgrp_handoff[8];
 355
 356 int arch_early_init_r(void)
 357 {
 358         int i;
 359
 360         /*
 361          * Write magic value into magic register to unlock support for
 362          * issuing warm reset. The ancient kernel code expects this
 363          * value to be written into the register by the bootloader, so
 364          * to support that old code, we write it here instead of in the
 365          * reset_cpu() function just before resetting the CPU.
 366          */
 367         writel(0xae9efebc, &sysmgr_regs->romcodegrp_warmramgrp_enable);
 368
 369         for (i = 0; i < 8; i++) /* Cache initial SW setting regs */
 370                 iswgrp_handoff[i] = readl(&sysmgr_regs->iswgrp_handoff[i]);
 371
 372         socfpga_bridges_reset(1);
 373         socfpga_nic301_slave_ns();
 374
 375         /*
 376          * Private components security:
 377          * U-Boot : configure private timer, global timer and cpu component
 378          * access as non secure for kernel stage (as required by Linux)
 379          */
 380         setbits_le32(&scu_regs->sacr, 0xfff);
 381
 382         /* Configure the L2 controller to make SDRAM start at 0 */
 383 #ifdef CONFIG_SOCFPGA_VIRTUAL_TARGET
 384         writel(0x2, &nic301_regs->remap);
 385 #else
 386         writel(0x1, &nic301_regs->remap);       /* remap.mpuzero */
 387         writel(0x1, &pl310->pl310_addr_filter_start);
 388 #endif
 389
 390         /* Add device descriptor to FPGA device table */
 391         socfpga_fpga_add();
 392
 393 #ifdef CONFIG_DESIGNWARE_SPI
 394         /* Get Designware SPI controller out of reset */
 395         socfpga_per_reset(SOCFPGA_RESET(SPIM0), 0);
 396         socfpga_per_reset(SOCFPGA_RESET(SPIM1), 0);
 397 #endif
 398
 399 #ifdef CONFIG_NAND_DENALI
 400         socfpga_per_reset(SOCFPGA_RESET(NAND), 0);
 401 #endif
 402
 403         return 0;
 404 }
 405
 406 static void socfpga_sdram_apply_static_cfg(void)
 407 {
 408         const uint32_t staticcfg = SOCFPGA_SDR_ADDRESS + 0x505c;
 409         const uint32_t applymask = 0x8;
 410         uint32_t val = readl(staticcfg) | applymask;
 411
 412         /*
 413          * SDRAM staticcfg register specific:
 414          * When applying the register setting, the CPU must not access
 415          * SDRAM. Luckily for us, we can abuse i-cache here to help us
 416          * circumvent the SDRAM access issue. The idea is to make sure
 417          * that the code is in one full i-cache line by branching past
 418          * it and back. Once it is in the i-cache, we execute the core
 419          * of the code and apply the register settings.
 420          *
 421          * The code below uses 7 instructions, while the Cortex-A9 has
 422          * 32-byte cachelines, thus the limit is 8 instructions total.
 423          */
 424         asm volatile(
 425                 ".align 5                       \n"
 426                 "       b       2f              \n"
 427                 "1:     str     %0,     [%1]    \n"
 428                 "       dsb                     \n"
 429                 "       isb                     \n"
 430                 "       b       3f              \n"
 431                 "2:     b       1b              \n"
 432                 "3:     nop                     \n"
 433         : : "r"(val), "r"(staticcfg) : "memory", "cc");
 434 }
 435
 436 int do_bridge(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 437 {
 438         if (argc != 2)
 439                 return CMD_RET_USAGE;
 440
 441         argv++;
 442
 443         switch (*argv[0]) {
 444         case 'e':       /* Enable */
 445                 writel(iswgrp_handoff[2], &sysmgr_regs->fpgaintfgrp_module);
 446                 socfpga_sdram_apply_static_cfg();
 447                 writel(iswgrp_handoff[3], SOCFPGA_SDR_ADDRESS + 0x5080);
 448                 writel(iswgrp_handoff[0], &reset_manager_base->brg_mod_reset);
 449                 writel(iswgrp_handoff[1], &nic301_regs->remap);
 450                 break;
 451         case 'd':       /* Disable */
 452                 writel(0, &sysmgr_regs->fpgaintfgrp_module);
 453                 writel(0, SOCFPGA_SDR_ADDRESS + 0x5080);
 454                 socfpga_sdram_apply_static_cfg();
 455                 writel(0, &reset_manager_base->brg_mod_reset);
 456                 writel(1, &nic301_regs->remap);
 457                 break;
 458         default:
 459                 return CMD_RET_USAGE;
 460         }
 461
 462         return 0;
 463 }
 464
 465 U_BOOT_CMD(
 466         bridge, 2, 1, do_bridge,
 467         "SoCFPGA HPS FPGA bridge control",
 468         "enable  - Enable HPS-to-FPGA, FPGA-to-HPS, LWHPS-to-FPGA bridges\n"
 469         "bridge disable - Enable HPS-to-FPGA, FPGA-to-HPS, LWHPS-to-FPGA bridges\n"
 470         ""
 471 );