arch/arm/mach-socfpga/misc_gen5.c

   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