arch/arm/mach-socfpga/misc.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 <errno.h>
   9 #include <fdtdec.h>
  10 #include <linux/libfdt.h>
  11 #include <altera.h>
  12 #include <miiphy.h>
  13 #include <netdev.h>
  14 #include <watchdog.h>
  15 #include <asm/arch/misc.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 DECLARE_GLOBAL_DATA_PTR;
  24
  25 #ifdef CONFIG_SYS_L2_PL310
  26 static const struct pl310_regs *const pl310 =
  27         (struct pl310_regs *)CONFIG_SYS_PL310_BASE;
  28 #endif
  29
  30 struct bsel bsel_str[] = {
  31         { "rsvd", "Reserved", },
  32         { "fpga", "FPGA (HPS2FPGA Bridge)", },
  33         { "nand", "NAND Flash (1.8V)", },
  34         { "nand", "NAND Flash (3.0V)", },
  35         { "sd", "SD/MMC External Transceiver (1.8V)", },
  36         { "sd", "SD/MMC Internal Transceiver (3.0V)", },
  37         { "qspi", "QSPI Flash (1.8V)", },
  38         { "qspi", "QSPI Flash (3.0V)", },
  39 };
  40
  41 int dram_init(void)
  42 {
  43         if (fdtdec_setup_mem_size_base() != 0)
  44                 return -EINVAL;
  45
  46         return 0;
  47 }
  48
  49 void enable_caches(void)
  50 {
  51 #ifndef CONFIG_SYS_ICACHE_OFF
  52         icache_enable();
  53 #endif
  54 #ifndef CONFIG_SYS_DCACHE_OFF
  55         dcache_enable();
  56 #endif
  57 }
  58
  59 #ifdef CONFIG_SYS_L2_PL310
  60 void v7_outer_cache_enable(void)
  61 {
  62         /* Disable the L2 cache */
  63         clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
  64
  65         /* enable BRESP, instruction and data prefetch, full line of zeroes */
  66         setbits_le32(&pl310->pl310_aux_ctrl,
  67                      L310_AUX_CTRL_DATA_PREFETCH_MASK |
  68                      L310_AUX_CTRL_INST_PREFETCH_MASK |
  69                      L310_SHARED_ATT_OVERRIDE_ENABLE);
  70
  71         /* Enable the L2 cache */
  72         setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
  73 }
  74
  75 void v7_outer_cache_disable(void)
  76 {
  77         /* Disable the L2 cache */
  78         clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
  79 }
  80 #endif
  81
  82 #if defined(CONFIG_SYS_CONSOLE_IS_IN_ENV) && \
  83 defined(CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE)
  84 int overwrite_console(void)
  85 {
  86         return 0;
  87 }
  88 #endif
  89
  90 #ifdef CONFIG_FPGA
  91 /* add device descriptor to FPGA device table */
  92 void socfpga_fpga_add(void *fpga_desc)
  93 {
  94         fpga_init();
  95         fpga_add(fpga_altera, fpga_desc);
  96 }
  97 #endif
  98
  99 int arch_cpu_init(void)
 100 {
 101 #ifdef CONFIG_HW_WATCHDOG
 102         /*
 103          * In case the watchdog is enabled, make sure to (re-)configure it
 104          * so that the defined timeout is valid. Otherwise the SPL (Perloader)
 105          * timeout value is still active which might too short for Linux
 106          * booting.
 107          */
 108         hw_watchdog_init();
 109 #else
 110         /*
 111          * If the HW watchdog is NOT enabled, make sure it is not running,
 112          * for example because it was enabled in the preloader. This might
 113          * trigger a watchdog-triggered reboot of Linux kernel later.
 114          * Toggle watchdog reset, so watchdog in not running state.
 115          */
 116         socfpga_per_reset(SOCFPGA_RESET(L4WD0), 1);
 117         socfpga_per_reset(SOCFPGA_RESET(L4WD0), 0);
 118 #endif
 119
 120         return 0;
 121 }
 122
 123 #ifndef CONFIG_SPL_BUILD
 124 static int do_bridge(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 125 {
 126         if (argc != 2)
 127                 return CMD_RET_USAGE;
 128
 129         argv++;
 130
 131         switch (*argv[0]) {
 132         case 'e':       /* Enable */
 133                 do_bridge_reset(1);
 134                 break;
 135         case 'd':       /* Disable */
 136                 do_bridge_reset(0);
 137                 break;
 138         default:
 139                 return CMD_RET_USAGE;
 140         }
 141
 142         return 0;
 143 }
 144
 145 U_BOOT_CMD(bridge, 2, 1, do_bridge,
 146            "SoCFPGA HPS FPGA bridge control",
 147            "enable  - Enable HPS-to-FPGA, FPGA-to-HPS, LWHPS-to-FPGA bridges\n"
 148            "bridge disable - Enable HPS-to-FPGA, FPGA-to-HPS, LWHPS-to-FPGA bridges\n"
 149            ""
 150 );
 151
 152 #endif