arch/arm/mach-socfpga/socfpga.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (C) 2012-2015 Altera Corporation
   4  */
   5 #include <linux/irqchip.h>
   6 #include <linux/of.h>
   7 #include <linux/of_address.h>
   8 #include <linux/reboot.h>
   9 #include <linux/reset/socfpga.h>
  10
  11 #include <asm/mach/arch.h>
  12 #include <asm/mach/map.h>
  13 #include <asm/cacheflush.h>
  14
  15 #include "core.h"
  16
  17 void __iomem *sys_manager_base_addr;
  18 void __iomem *rst_manager_base_addr;
  19 void __iomem *sdr_ctl_base_addr;
  20 unsigned long socfpga_cpu1start_addr;
  21
  22 static void __init socfpga_sysmgr_init(void)
  23 {
  24         struct device_node *np;
  25
  26         np = of_find_compatible_node(NULL, NULL, "altr,sys-mgr");
  27
  28         if (of_property_read_u32(np, "cpu1-start-addr",
  29                         (u32 *) &socfpga_cpu1start_addr))
  30                 pr_err("SMP: Need cpu1-start-addr in device tree.\n");
  31
  32         /* Ensure that socfpga_cpu1start_addr is visible to other CPUs */
  33         smp_wmb();
  34         sync_cache_w(&socfpga_cpu1start_addr);
  35
  36         sys_manager_base_addr = of_iomap(np, 0);
  37
  38         np = of_find_compatible_node(NULL, NULL, "altr,rst-mgr");
  39         rst_manager_base_addr = of_iomap(np, 0);
  40
  41         np = of_find_compatible_node(NULL, NULL, "altr,sdr-ctl");
  42         sdr_ctl_base_addr = of_iomap(np, 0);
  43 }
  44
  45 static void __init socfpga_init_irq(void)
  46 {
  47         irqchip_init();
  48         socfpga_sysmgr_init();
  49         if (IS_ENABLED(CONFIG_EDAC_ALTERA_L2C))
  50                 socfpga_init_l2_ecc();
  51
  52         if (IS_ENABLED(CONFIG_EDAC_ALTERA_OCRAM))
  53                 socfpga_init_ocram_ecc();
  54         socfpga_reset_init();
  55 }
  56
  57 static void __init socfpga_arria10_init_irq(void)
  58 {
  59         irqchip_init();
  60         socfpga_sysmgr_init();
  61         if (IS_ENABLED(CONFIG_EDAC_ALTERA_L2C))
  62                 socfpga_init_arria10_l2_ecc();
  63         if (IS_ENABLED(CONFIG_EDAC_ALTERA_OCRAM))
  64                 socfpga_init_arria10_ocram_ecc();
  65         socfpga_reset_init();
  66 }
  67
  68 static void socfpga_cyclone5_restart(enum reboot_mode mode, const char *cmd)
  69 {
  70         u32 temp;
  71
  72         temp = readl(rst_manager_base_addr + SOCFPGA_RSTMGR_CTRL);
  73
  74         if (mode == REBOOT_WARM)
  75                 temp |= RSTMGR_CTRL_SWWARMRSTREQ;
  76         else
  77                 temp |= RSTMGR_CTRL_SWCOLDRSTREQ;
  78         writel(temp, rst_manager_base_addr + SOCFPGA_RSTMGR_CTRL);
  79 }
  80
  81 static void socfpga_arria10_restart(enum reboot_mode mode, const char *cmd)
  82 {
  83         u32 temp;
  84
  85         temp = readl(rst_manager_base_addr + SOCFPGA_A10_RSTMGR_CTRL);
  86
  87         if (mode == REBOOT_WARM)
  88                 temp |= RSTMGR_CTRL_SWWARMRSTREQ;
  89         else
  90                 temp |= RSTMGR_CTRL_SWCOLDRSTREQ;
  91         writel(temp, rst_manager_base_addr + SOCFPGA_A10_RSTMGR_CTRL);
  92 }
  93
  94 static const char *altera_dt_match[] = {
  95         "altr,socfpga",
  96         NULL
  97 };
  98
  99 DT_MACHINE_START(SOCFPGA, "Altera SOCFPGA")
 100         .l2c_aux_val    = 0,
 101         .l2c_aux_mask   = ~0,
 102         .init_irq       = socfpga_init_irq,
 103         .restart        = socfpga_cyclone5_restart,
 104         .dt_compat      = altera_dt_match,
 105 MACHINE_END
 106
 107 static const char *altera_a10_dt_match[] = {
 108         "altr,socfpga-arria10",
 109         NULL
 110 };
 111
 112 DT_MACHINE_START(SOCFPGA_A10, "Altera SOCFPGA Arria10")
 113         .l2c_aux_val    = 0,
 114         .l2c_aux_mask   = ~0,
 115         .init_irq       = socfpga_arria10_init_irq,
 116         .restart        = socfpga_arria10_restart,
 117         .dt_compat      = altera_a10_dt_match,
 118 MACHINE_END