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 <config.h>
   7 #include <cpu_func.h>
   8 #include <init.h>
   9 #include <asm/global_data.h>
  10 #include <asm/io.h>
  11 #include <env.h>
  12 #include <errno.h>
  13 #include <fdtdec.h>
  14 #include <linux/bitops.h>
  15 #include <linux/libfdt.h>
  16 #include <altera.h>
  17 #include <miiphy.h>
  18 #include <netdev.h>
  19 #include <watchdog.h>
  20 #include <asm/arch/misc.h>
  21 #include <asm/arch/reset_manager.h>
  22 #include <asm/arch/scan_manager.h>
  23 #include <asm/arch/sdram.h>
  24 #include <asm/arch/system_manager.h>
  25 #include <asm/arch/nic301.h>
  26 #include <asm/arch/scu.h>
  27 #include <asm/pl310.h>
  28
  29 #include <dt-bindings/reset/altr,rst-mgr.h>
  30
  31 DECLARE_GLOBAL_DATA_PTR;
  32
  33 static struct pl310_regs *const pl310 =
  34         (struct pl310_regs *)CFG_SYS_PL310_BASE;
  35 static struct nic301_registers *nic301_regs =
  36         (struct nic301_registers *)SOCFPGA_L3REGS_ADDRESS;
  37 static struct scu_registers *scu_regs =
  38         (struct scu_registers *)SOCFPGA_MPUSCU_ADDRESS;
  39
  40 /*
  41  * FPGA programming support for SoC FPGA Cyclone V
  42  */
  43 static Altera_desc altera_fpga[] = {
  44         {
  45                 /* Family */
  46                 Altera_SoCFPGA,
  47                 /* Interface type */
  48                 fast_passive_parallel,
  49                 /* No limitation as additional data will be ignored */
  50                 -1,
  51                 /* No device function table */
  52                 NULL,
  53                 /* Base interface address specified in driver */
  54                 NULL,
  55                 /* No cookie implementation */
  56                 0
  57         },
  58 };
  59
  60 static const struct {
  61         const u16       pn;
  62         const char      *name;
  63         const char      *var;
  64 } socfpga_fpga_model[] = {
  65         /* Cyclone V E */
  66         { 0x2b15, "Cyclone V, E/A2", "cv_e_a2" },
  67         { 0x2b05, "Cyclone V, E/A4", "cv_e_a4" },
  68         { 0x2b22, "Cyclone V, E/A5", "cv_e_a5" },
  69         { 0x2b13, "Cyclone V, E/A7", "cv_e_a7" },
  70         { 0x2b14, "Cyclone V, E/A9", "cv_e_a9" },
  71         /* Cyclone V GX/GT */
  72         { 0x2b01, "Cyclone V, GX/C3", "cv_gx_c3" },
  73         { 0x2b12, "Cyclone V, GX/C4", "cv_gx_c4" },
  74         { 0x2b02, "Cyclone V, GX/C5 or GT/D5", "cv_gx_c5" },
  75         { 0x2b03, "Cyclone V, GX/C7 or GT/D7", "cv_gx_c7" },
  76         { 0x2b04, "Cyclone V, GX/C9 or GT/D9", "cv_gx_c9" },
  77         /* Cyclone V SE/SX/ST */
  78         { 0x2d11, "Cyclone V, SE/A2 or SX/C2", "cv_se_a2" },
  79         { 0x2d01, "Cyclone V, SE/A4 or SX/C4", "cv_se_a4" },
  80         { 0x2d12, "Cyclone V, SE/A5 or SX/C5 or ST/D5", "cv_se_a5" },
  81         { 0x2d02, "Cyclone V, SE/A6 or SX/C6 or ST/D6", "cv_se_a6" },
  82         /* Arria V */
  83         { 0x2d03, "Arria V, D5", "av_d5" },
  84         /* Arria V ST/SX */
  85         { 0x2d13, "Arria V, ST/D3 or SX/B3", "av_st_d3" },
  86 };
  87
  88 static int socfpga_fpga_id(const bool print_id)
  89 {
  90         const u32 altera_mi = 0x6e;
  91         const u32 id = scan_mgr_get_fpga_id();
  92
  93         const u32 lsb = id & 0x00000001;
  94         const u32 mi = (id >> 1) & 0x000007ff;
  95         const u32 pn = (id >> 12) & 0x0000ffff;
  96         const u32 version = (id >> 28) & 0x0000000f;
  97         int i;
  98
  99         if ((mi != altera_mi) || (lsb != 1)) {
 100                 printf("FPGA:  Not Altera chip ID\n");
 101                 return -EINVAL;
 102         }
 103
 104         for (i = 0; i < ARRAY_SIZE(socfpga_fpga_model); i++)
 105                 if (pn == socfpga_fpga_model[i].pn)
 106                         break;
 107
 108         if (i == ARRAY_SIZE(socfpga_fpga_model)) {
 109                 printf("FPGA:  Unknown Altera chip, ID 0x%08x\n", id);
 110                 return -EINVAL;
 111         }
 112
 113         if (print_id)
 114                 printf("FPGA:  Altera %s, version 0x%01x\n",
 115                        socfpga_fpga_model[i].name, version);
 116         return i;
 117 }
 118
 119 /*
 120  * Print CPU information
 121  */
 122 #if defined(CONFIG_DISPLAY_CPUINFO)
 123 int print_cpuinfo(void)
 124 {
 125         const u32 bootinfo = readl(socfpga_get_sysmgr_addr() +
 126                                    SYSMGR_GEN5_BOOTINFO);
 127         const u32 bsel = SYSMGR_GET_BOOTINFO_BSEL(bootinfo);
 128
 129         puts("CPU:   Altera SoCFPGA Platform\n");
 130         socfpga_fpga_id(1);
 131
 132         printf("BOOT:  %s\n", bsel_str[bsel].name);
 133         return 0;
 134 }
 135 #endif
 136
 137 #ifdef CONFIG_ARCH_MISC_INIT
 138 int arch_misc_init(void)
 139 {
 140         const u32 bsel = readl(socfpga_get_sysmgr_addr() +
 141                                SYSMGR_GEN5_BOOTINFO) & 0x7;
 142         const int fpga_id = socfpga_fpga_id(0);
 143         env_set("bootmode", bsel_str[bsel].mode);
 144         if (fpga_id >= 0)
 145                 env_set("fpgatype", socfpga_fpga_model[fpga_id].var);
 146         return 0;
 147 }
 148 #endif
 149
 150 /*
 151  * Convert all NIC-301 AMBA slaves from secure to non-secure
 152  */
 153 static void socfpga_nic301_slave_ns(void)
 154 {
 155         writel(0x1, &nic301_regs->lwhps2fpgaregs);
 156         writel(0x1, &nic301_regs->hps2fpgaregs);
 157         writel(0x1, &nic301_regs->acp);
 158         writel(0x1, &nic301_regs->rom);
 159         writel(0x1, &nic301_regs->ocram);
 160         writel(0x1, &nic301_regs->sdrdata);
 161 }
 162
 163 void socfpga_sdram_remap_zero(void)
 164 {
 165         u32 remap;
 166
 167         socfpga_nic301_slave_ns();
 168
 169         /*
 170          * Private components security:
 171          * U-Boot : configure private timer, global timer and cpu component
 172          * access as non secure for kernel stage (as required by Linux)
 173          */
 174         setbits_le32(&scu_regs->sacr, 0xfff);
 175
 176         /* Configure the L2 controller to make SDRAM start at 0 */
 177         remap = 0x1; /* remap.mpuzero */
 178         /* Keep fpga bridge enabled when running from FPGA onchip RAM */
 179         if (socfpga_is_booting_from_fpga())
 180                 remap |= 0x8; /* remap.hps2fpga */
 181         writel(remap, &nic301_regs->remap);
 182
 183         writel(0x1, &pl310->pl310_addr_filter_start);
 184 }
 185
 186 static u32 iswgrp_handoff[8];
 187
 188 int arch_early_init_r(void)
 189 {
 190         int i;
 191
 192         /*
 193          * Write magic value into magic register to unlock support for
 194          * issuing warm reset. The ancient kernel code expects this
 195          * value to be written into the register by the bootloader, so
 196          * to support that old code, we write it here instead of in the
 197          * reset_cpu() function just before resetting the CPU.
 198          */
 199         writel(0xae9efebc,
 200                socfpga_get_sysmgr_addr() + SYSMGR_GEN5_WARMRAMGRP_EN);
 201
 202         for (i = 0; i < 8; i++) /* Cache initial SW setting regs */
 203                 iswgrp_handoff[i] = readl(socfpga_get_sysmgr_addr() +
 204                                           SYSMGR_ISWGRP_HANDOFF_OFFSET(i));
 205
 206         socfpga_bridges_reset(1);
 207
 208         socfpga_sdram_remap_zero();
 209
 210         /* Add device descriptor to FPGA device table */
 211         socfpga_fpga_add(&altera_fpga[0]);
 212
 213         return 0;
 214 }
 215
 216 #ifndef CONFIG_SPL_BUILD
 217 static struct socfpga_sdr_ctrl *sdr_ctrl =
 218         (struct socfpga_sdr_ctrl *)SDR_CTRLGRP_ADDRESS;
 219
 220 void do_bridge_reset(int enable, unsigned int mask)
 221 {
 222         int i;
 223
 224         if (enable) {
 225                 socfpga_bridges_set_handoff_regs(!(mask & BIT(0)),
 226                                                  !(mask & BIT(1)),
 227                                                  !(mask & BIT(2)));
 228                 for (i = 0; i < 2; i++) {       /* Reload SW setting cache */
 229                         iswgrp_handoff[i] =
 230                                 readl(socfpga_get_sysmgr_addr() +
 231                                       SYSMGR_ISWGRP_HANDOFF_OFFSET(i));
 232                 }
 233
 234                 writel(iswgrp_handoff[2],
 235                        socfpga_get_sysmgr_addr() +
 236                        SYSMGR_GEN5_FPGAINFGRP_MODULE);
 237                 writel(iswgrp_handoff[3], &sdr_ctrl->fpgaport_rst);
 238                 writel(iswgrp_handoff[0],
 239                        socfpga_get_rstmgr_addr() + RSTMGR_GEN5_BRGMODRST);
 240                 writel(iswgrp_handoff[1], &nic301_regs->remap);
 241
 242                 writel(0x7, socfpga_get_rstmgr_addr() + RSTMGR_GEN5_BRGMODRST);
 243                 writel(iswgrp_handoff[0],
 244                        socfpga_get_rstmgr_addr() + RSTMGR_GEN5_BRGMODRST);
 245         } else {
 246                 writel(0, socfpga_get_sysmgr_addr() +
 247                        SYSMGR_GEN5_FPGAINFGRP_MODULE);
 248                 writel(0, &sdr_ctrl->fpgaport_rst);
 249                 writel(0x7, socfpga_get_rstmgr_addr() + RSTMGR_GEN5_BRGMODRST);
 250                 writel(1, &nic301_regs->remap);
 251         }
 252 }
 253 #endif