1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Carsten Langgaard, carstenl@mips.com
4 * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
5 */
6 #include <linux/init.h>
7 #include <linux/ioport.h>
8 #include <linux/pm.h>
9 #include <linux/time.h>
10
11 #include <asm/reboot.h>
12 #include <asm/mach-ar7/ar7.h>
13 #include <asm/mach-ar7/prom.h>
14
ar7_machine_restart(char * command)15 static void ar7_machine_restart(char *command)
16 {
17 u32 *softres_reg = ioremap(AR7_REGS_RESET + AR7_RESET_SOFTWARE, 1);
18
19 writel(1, softres_reg);
20 }
21
ar7_machine_halt(void)22 static void ar7_machine_halt(void)
23 {
24 while (1)
25 ;
26 }
27
ar7_machine_power_off(void)28 static void ar7_machine_power_off(void)
29 {
30 u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
31 u32 power_state = readl(power_reg) | (3 << 30);
32
33 writel(power_state, power_reg);
34 ar7_machine_halt();
35 }
36
get_system_type(void)37 const char *get_system_type(void)
38 {
39 u16 chip_id = ar7_chip_id();
40 u16 titan_variant_id = titan_chip_id();
41
42 switch (chip_id) {
43 case AR7_CHIP_7100:
44 return "TI AR7 (TNETD7100)";
45 case AR7_CHIP_7200:
46 return "TI AR7 (TNETD7200)";
47 case AR7_CHIP_7300:
48 return "TI AR7 (TNETD7300)";
49 case AR7_CHIP_TITAN:
50 switch (titan_variant_id) {
51 case TITAN_CHIP_1050:
52 return "TI AR7 (TNETV1050)";
53 case TITAN_CHIP_1055:
54 return "TI AR7 (TNETV1055)";
55 case TITAN_CHIP_1056:
56 return "TI AR7 (TNETV1056)";
57 case TITAN_CHIP_1060:
58 return "TI AR7 (TNETV1060)";
59 }
60 fallthrough;
61 default:
62 return "TI AR7 (unknown)";
63 }
64 }
65
ar7_init_console(void)66 static int __init ar7_init_console(void)
67 {
68 return 0;
69 }
70 console_initcall(ar7_init_console);
71
72 /*
73 * Initializes basic routines and structures pointers, memory size (as
74 * given by the bios and saves the command line.
75 */
plat_mem_setup(void)76 void __init plat_mem_setup(void)
77 {
78 unsigned long io_base;
79
80 _machine_restart = ar7_machine_restart;
81 _machine_halt = ar7_machine_halt;
82 pm_power_off = ar7_machine_power_off;
83
84 io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
85 if (!io_base)
86 panic("Can't remap IO base!");
87 set_io_port_base(io_base);
88
89 prom_meminit();
90
91 printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
92 get_system_type(), ar7_chip_id(), ar7_chip_rev());
93 }
94