Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
15static 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
22static void ar7_machine_halt(void)
23{
24 while (1)
25 ;
26}
27
28static 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
37const 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 default:
61 return "TI AR7 (unknown)";
62 }
63}
64
65static int __init ar7_init_console(void)
66{
67 return 0;
68}
69console_initcall(ar7_init_console);
70
71/*
72 * Initializes basic routines and structures pointers, memory size (as
73 * given by the bios and saves the command line.
74 */
75void __init plat_mem_setup(void)
76{
77 unsigned long io_base;
78
79 _machine_restart = ar7_machine_restart;
80 _machine_halt = ar7_machine_halt;
81 pm_power_off = ar7_machine_power_off;
82
83 io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
84 if (!io_base)
85 panic("Can't remap IO base!");
86 set_io_port_base(io_base);
87
88 prom_meminit();
89
90 printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
91 get_system_type(), ar7_chip_id(), ar7_chip_rev());
92}