arch/arm/mach-socfpga/socfpga.c

   1 /*
   2  *  Copyright (C) 2012-2015 Altera Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 #include <linux/irqchip.h>
  18 #include <linux/of_address.h>
  19 #include <linux/of_irq.h>
  20 #include <linux/of_platform.h>
  21 #include <linux/reboot.h>
  22
  23 #include <asm/hardware/cache-l2x0.h>
  24 #include <asm/mach/arch.h>
  25 #include <asm/mach/map.h>
  26 #include <asm/cacheflush.h>
  27
  28 #include "core.h"
  29
  30 void __iomem *sys_manager_base_addr;
  31 void __iomem *rst_manager_base_addr;
  32 void __iomem *sdr_ctl_base_addr;
  33 unsigned long socfpga_cpu1start_addr;
  34
  35 void __init socfpga_sysmgr_init(void)
  36 {
  37         struct device_node *np;
  38
  39         np = of_find_compatible_node(NULL, NULL, "altr,sys-mgr");
  40
  41         if (of_property_read_u32(np, "cpu1-start-addr",
  42                         (u32 *) &socfpga_cpu1start_addr))
  43                 pr_err("SMP: Need cpu1-start-addr in device tree.\n");
  44
  45         /* Ensure that socfpga_cpu1start_addr is visible to other CPUs */
  46         smp_wmb();
  47         sync_cache_w(&socfpga_cpu1start_addr);
  48
  49         sys_manager_base_addr = of_iomap(np, 0);
  50
  51         np = of_find_compatible_node(NULL, NULL, "altr,rst-mgr");
  52         rst_manager_base_addr = of_iomap(np, 0);
  53
  54         np = of_find_compatible_node(NULL, NULL, "altr,sdr-ctl");
  55         sdr_ctl_base_addr = of_iomap(np, 0);
  56 }
  57
  58 static void __init socfpga_init_irq(void)
  59 {
  60         irqchip_init();
  61         socfpga_sysmgr_init();
  62         if (IS_ENABLED(CONFIG_EDAC_ALTERA_L2C))
  63                 socfpga_init_l2_ecc();
  64
  65         if (IS_ENABLED(CONFIG_EDAC_ALTERA_OCRAM))
  66                 socfpga_init_ocram_ecc();
  67 }
  68
  69 static void socfpga_cyclone5_restart(enum reboot_mode mode, const char *cmd)
  70 {
  71         u32 temp;
  72
  73         temp = readl(rst_manager_base_addr + SOCFPGA_RSTMGR_CTRL);
  74
  75         if (mode == REBOOT_HARD)
  76                 temp |= RSTMGR_CTRL_SWCOLDRSTREQ;
  77         else
  78                 temp |= RSTMGR_CTRL_SWWARMRSTREQ;
  79         writel(temp, rst_manager_base_addr + SOCFPGA_RSTMGR_CTRL);
  80 }
  81
  82 static void socfpga_arria10_restart(enum reboot_mode mode, const char *cmd)
  83 {
  84         u32 temp;
  85
  86         temp = readl(rst_manager_base_addr + SOCFPGA_A10_RSTMGR_CTRL);
  87
  88         if (mode == REBOOT_HARD)
  89                 temp |= RSTMGR_CTRL_SWCOLDRSTREQ;
  90         else
  91                 temp |= RSTMGR_CTRL_SWWARMRSTREQ;
  92         writel(temp, rst_manager_base_addr + SOCFPGA_A10_RSTMGR_CTRL);
  93 }
  94
  95 static const char *altera_dt_match[] = {
  96         "altr,socfpga",
  97         NULL
  98 };
  99
 100 DT_MACHINE_START(SOCFPGA, "Altera SOCFPGA")
 101         .l2c_aux_val    = 0,
 102         .l2c_aux_mask   = ~0,
 103         .init_irq       = socfpga_init_irq,
 104         .restart        = socfpga_cyclone5_restart,
 105         .dt_compat      = altera_dt_match,
 106 MACHINE_END
 107
 108 static const char *altera_a10_dt_match[] = {
 109         "altr,socfpga-arria10",
 110         NULL
 111 };
 112
 113 DT_MACHINE_START(SOCFPGA_A10, "Altera SOCFPGA Arria10")
 114         .l2c_aux_val    = 0,
 115         .l2c_aux_mask   = ~0,
 116         .init_irq       = socfpga_init_irq,
 117         .restart        = socfpga_arria10_restart,
 118         .dt_compat      = altera_a10_dt_match,
 119 MACHINE_END