arch/arm/mach-socfpga/misc_gen5.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  Copyright (C) 2012-2017 Altera Corporation <www.altera.com>
   4  */
   5
   6 #include <common.h>
   7 #include <asm/io.h>
   8 #include <env.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  * FPGA programming support for SoC FPGA Cyclone V
  40  */
  41 static Altera_desc altera_fpga[] = {
  42         {
  43                 /* Family */
  44                 Altera_SoCFPGA,
  45                 /* Interface type */
  46                 fast_passive_parallel,
  47                 /* No limitation as additional data will be ignored */
  48                 -1,
  49                 /* No device function table */
  50                 NULL,
  51                 /* Base interface address specified in driver */
  52                 NULL,
  53                 /* No cookie implementation */
  54                 0
  55         },
  56 };
  57
  58 static const struct {
  59         const u16       pn;
  60         const char      *name;
  61         const char      *var;
  62 } socfpga_fpga_model[] = {
  63         /* Cyclone V E */
  64         { 0x2b15, "Cyclone V, E/A2", "cv_e_a2" },
  65         { 0x2b05, "Cyclone V, E/A4", "cv_e_a4" },
  66         { 0x2b22, "Cyclone V, E/A5", "cv_e_a5" },
  67         { 0x2b13, "Cyclone V, E/A7", "cv_e_a7" },
  68         { 0x2b14, "Cyclone V, E/A9", "cv_e_a9" },
  69         /* Cyclone V GX/GT */
  70         { 0x2b01, "Cyclone V, GX/C3", "cv_gx_c3" },
  71         { 0x2b12, "Cyclone V, GX/C4", "cv_gx_c4" },
  72         { 0x2b02, "Cyclone V, GX/C5 or GT/D5", "cv_gx_c5" },
  73         { 0x2b03, "Cyclone V, GX/C7 or GT/D7", "cv_gx_c7" },
  74         { 0x2b04, "Cyclone V, GX/C9 or GT/D9", "cv_gx_c9" },
  75         /* Cyclone V SE/SX/ST */
  76         { 0x2d11, "Cyclone V, SE/A2 or SX/C2", "cv_se_a2" },
  77         { 0x2d01, "Cyclone V, SE/A4 or SX/C4", "cv_se_a4" },
  78         { 0x2d12, "Cyclone V, SE/A5 or SX/C5 or ST/D5", "cv_se_a5" },
  79         { 0x2d02, "Cyclone V, SE/A6 or SX/C6 or ST/D6", "cv_se_a6" },
  80         /* Arria V */
  81         { 0x2d03, "Arria V, D5", "av_d5" },
  82         /* Arria V ST/SX */
  83         { 0x2d13, "Arria V, ST/D3 or SX/B3", "av_st_d3" },
  84 };
  85
  86 static int socfpga_fpga_id(const bool print_id)
  87 {
  88         const u32 altera_mi = 0x6e;
  89         const u32 id = scan_mgr_get_fpga_id();
  90
  91         const u32 lsb = id & 0x00000001;
  92         const u32 mi = (id >> 1) & 0x000007ff;
  93         const u32 pn = (id >> 12) & 0x0000ffff;
  94         const u32 version = (id >> 28) & 0x0000000f;
  95         int i;
  96
  97         if ((mi != altera_mi) || (lsb != 1)) {
  98                 printf("FPGA:  Not Altera chip ID\n");
  99                 return -EINVAL;
 100         }
 101
 102         for (i = 0; i < ARRAY_SIZE(socfpga_fpga_model); i++)
 103                 if (pn == socfpga_fpga_model[i].pn)
 104                         break;
 105
 106         if (i == ARRAY_SIZE(socfpga_fpga_model)) {
 107                 printf("FPGA:  Unknown Altera chip, ID 0x%08x\n", id);
 108                 return -EINVAL;
 109         }
 110
 111         if (print_id)
 112                 printf("FPGA:  Altera %s, version 0x%01x\n",
 113                        socfpga_fpga_model[i].name, version);
 114         return i;
 115 }
 116
 117 /*
 118  * Print CPU information
 119  */
 120 #if defined(CONFIG_DISPLAY_CPUINFO)
 121 int print_cpuinfo(void)
 122 {
 123         const u32 bsel =
 124                 SYSMGR_GET_BOOTINFO_BSEL(readl(&sysmgr_regs->bootinfo));
 125
 126         puts("CPU:   Altera SoCFPGA Platform\n");
 127         socfpga_fpga_id(1);
 128
 129         printf("BOOT:  %s\n", bsel_str[bsel].name);
 130         return 0;
 131 }
 132 #endif
 133
 134 #ifdef CONFIG_ARCH_MISC_INIT
 135 int arch_misc_init(void)
 136 {
 137         const u32 bsel = readl(&sysmgr_regs->bootinfo) & 0x7;
 138         const int fpga_id = socfpga_fpga_id(0);
 139         env_set("bootmode", bsel_str[bsel].mode);
 140         if (fpga_id >= 0)
 141                 env_set("fpgatype", socfpga_fpga_model[fpga_id].var);
 142         return 0;
 143 }
 144 #endif
 145
 146 /*
 147  * Convert all NIC-301 AMBA slaves from secure to non-secure
 148  */
 149 static void socfpga_nic301_slave_ns(void)
 150 {
 151         writel(0x1, &nic301_regs->lwhps2fpgaregs);
 152         writel(0x1, &nic301_regs->hps2fpgaregs);
 153         writel(0x1, &nic301_regs->acp);
 154         writel(0x1, &nic301_regs->rom);
 155         writel(0x1, &nic301_regs->ocram);
 156         writel(0x1, &nic301_regs->sdrdata);
 157 }
 158
 159 void socfpga_sdram_remap_zero(void)
 160 {
 161         u32 remap;
 162
 163         socfpga_nic301_slave_ns();
 164
 165         /*
 166          * Private components security:
 167          * U-Boot : configure private timer, global timer and cpu component
 168          * access as non secure for kernel stage (as required by Linux)
 169          */
 170         setbits_le32(&scu_regs->sacr, 0xfff);
 171
 172         /* Configure the L2 controller to make SDRAM start at 0 */
 173         remap = 0x1; /* remap.mpuzero */
 174         /* Keep fpga bridge enabled when running from FPGA onchip RAM */
 175         if (socfpga_is_booting_from_fpga())
 176                 remap |= 0x8; /* remap.hps2fpga */
 177         writel(remap, &nic301_regs->remap);
 178
 179         writel(0x1, &pl310->pl310_addr_filter_start);
 180 }
 181
 182 static u32 iswgrp_handoff[8];
 183
 184 int arch_early_init_r(void)
 185 {
 186         int i;
 187
 188         /*
 189          * Write magic value into magic register to unlock support for
 190          * issuing warm reset. The ancient kernel code expects this
 191          * value to be written into the register by the bootloader, so
 192          * to support that old code, we write it here instead of in the
 193          * reset_cpu() function just before resetting the CPU.
 194          */
 195         writel(0xae9efebc, &sysmgr_regs->romcodegrp_warmramgrp_enable);
 196
 197         for (i = 0; i < 8; i++) /* Cache initial SW setting regs */
 198                 iswgrp_handoff[i] = readl(&sysmgr_regs->iswgrp_handoff[i]);
 199
 200         socfpga_bridges_reset(1);
 201
 202         socfpga_sdram_remap_zero();
 203
 204         /* Add device descriptor to FPGA device table */
 205         socfpga_fpga_add(&altera_fpga[0]);
 206
 207         return 0;
 208 }
 209
 210 #ifndef CONFIG_SPL_BUILD
 211 static struct socfpga_reset_manager *reset_manager_base =
 212         (struct socfpga_reset_manager *)SOCFPGA_RSTMGR_ADDRESS;
 213 static struct socfpga_sdr_ctrl *sdr_ctrl =
 214         (struct socfpga_sdr_ctrl *)SDR_CTRLGRP_ADDRESS;
 215
 216 void do_bridge_reset(int enable, unsigned int mask)
 217 {
 218         int i;
 219
 220         if (enable) {
 221                 socfpga_bridges_set_handoff_regs(!(mask & BIT(0)),
 222                                                  !(mask & BIT(1)),
 223                                                  !(mask & BIT(2)));
 224                 for (i = 0; i < 2; i++) {       /* Reload SW setting cache */
 225                         iswgrp_handoff[i] =
 226                                 readl(&sysmgr_regs->iswgrp_handoff[i]);
 227                 }
 228
 229                 writel(iswgrp_handoff[2], &sysmgr_regs->fpgaintfgrp_module);
 230                 writel(iswgrp_handoff[3], &sdr_ctrl->fpgaport_rst);
 231                 writel(iswgrp_handoff[0], &reset_manager_base->brg_mod_reset);
 232                 writel(iswgrp_handoff[1], &nic301_regs->remap);
 233
 234                 writel(0x7, &reset_manager_base->brg_mod_reset);
 235                 writel(iswgrp_handoff[0], &reset_manager_base->brg_mod_reset);
 236         } else {
 237                 writel(0, &sysmgr_regs->fpgaintfgrp_module);
 238                 writel(0, &sdr_ctrl->fpgaport_rst);
 239                 writel(0x7, &reset_manager_base->brg_mod_reset);
 240                 writel(1, &nic301_regs->remap);
 241         }
 242 }
 243 #endif