arch/mips/rb532/setup.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * setup.c - boot time setup code
   4  */
   5
   6 #include <linux/init.h>
   7 #include <linux/export.h>
   8
   9 #include <asm/bootinfo.h>
  10 #include <asm/reboot.h>
  11 #include <asm/time.h>
  12 #include <linux/ioport.h>
  13
  14 #include <asm/mach-rc32434/rb.h>
  15 #include <asm/mach-rc32434/pci.h>
  16
  17 struct pci_reg __iomem *pci_reg;
  18 EXPORT_SYMBOL(pci_reg);
  19
  20 static struct resource pci0_res[] = {
  21         {
  22                 .name = "pci_reg0",
  23                 .start = PCI0_BASE_ADDR,
  24                 .end = PCI0_BASE_ADDR + sizeof(struct pci_reg),
  25                 .flags = IORESOURCE_MEM,
  26         }
  27 };
  28
  29 static void rb_machine_restart(char *command)
  30 {
  31         /* just jump to the reset vector */
  32         writel(0x80000001, IDT434_REG_BASE + RST);
  33         ((void (*)(void)) KSEG1ADDR(0x1FC00000u))();
  34 }
  35
  36 static void rb_machine_halt(void)
  37 {
  38         for (;;)
  39                 continue;
  40 }
  41
  42 void __init plat_mem_setup(void)
  43 {
  44         u32 val;
  45
  46         _machine_restart = rb_machine_restart;
  47         _machine_halt = rb_machine_halt;
  48         pm_power_off = rb_machine_halt;
  49
  50         set_io_port_base(KSEG1);
  51
  52         pci_reg = ioremap_nocache(pci0_res[0].start,
  53                                 pci0_res[0].end - pci0_res[0].start);
  54         if (!pci_reg) {
  55                 printk(KERN_ERR "Could not remap PCI registers\n");
  56                 return;
  57         }
  58
  59         val = __raw_readl(&pci_reg->pcic);
  60         val &= 0xFFFFFF7;
  61         __raw_writel(val, (void *)&pci_reg->pcic);
  62
  63 #ifdef CONFIG_PCI
  64         /* Enable PCI interrupts in EPLD Mask register */
  65         *epld_mask = 0x0;
  66         *(epld_mask + 1) = 0x0;
  67 #endif
  68         write_c0_wired(0);
  69 }
  70
  71 const char *get_system_type(void)
  72 {
  73         switch (mips_machtype) {
  74         case MACH_MIKROTIK_RB532A:
  75                 return "Mikrotik RB532A";
  76                 break;
  77         default:
  78                 return "Mikrotik RB532";
  79                 break;
  80         }
  81 }