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 
rb_machine_restart(char * command)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 
rb_machine_halt(void)36 static void rb_machine_halt(void)
37 {
38 	for (;;)
39 		continue;
40 }
41 
plat_mem_setup(void)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(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 
get_system_type(void)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 }
82