xref: /openbmc/linux/arch/mips/ar7/setup.c (revision 7dd65feb)
1 /*
2  * Carsten Langgaard, carstenl@mips.com
3  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
4  *
5  *  This program is free software; you can distribute it and/or modify it
6  *  under the terms of the GNU General Public License (Version 2) as
7  *  published by the Free Software Foundation.
8  *
9  *  This program is distributed in the hope it will be useful, but WITHOUT
10  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  *  for more details.
13  *
14  *  You should have received a copy of the GNU General Public License along
15  *  with this program; if not, write to the Free Software Foundation, Inc.,
16  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
17  */
18 #include <linux/init.h>
19 #include <linux/ioport.h>
20 #include <linux/pm.h>
21 #include <linux/time.h>
22 
23 #include <asm/reboot.h>
24 #include <asm/mach-ar7/ar7.h>
25 #include <asm/mach-ar7/prom.h>
26 
27 static void ar7_machine_restart(char *command)
28 {
29 	u32 *softres_reg = ioremap(AR7_REGS_RESET +
30 					  AR7_RESET_SOFTWARE, 1);
31 	writel(1, softres_reg);
32 }
33 
34 static void ar7_machine_halt(void)
35 {
36 	while (1)
37 		;
38 }
39 
40 static void ar7_machine_power_off(void)
41 {
42 	u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
43 	u32 power_state = readl(power_reg) | (3 << 30);
44 	writel(power_state, power_reg);
45 	ar7_machine_halt();
46 }
47 
48 const char *get_system_type(void)
49 {
50 	u16 chip_id = ar7_chip_id();
51 	switch (chip_id) {
52 	case AR7_CHIP_7300:
53 		return "TI AR7 (TNETD7300)";
54 	case AR7_CHIP_7100:
55 		return "TI AR7 (TNETD7100)";
56 	case AR7_CHIP_7200:
57 		return "TI AR7 (TNETD7200)";
58 	default:
59 		return "TI AR7 (Unknown)";
60 	}
61 }
62 
63 static int __init ar7_init_console(void)
64 {
65 	return 0;
66 }
67 console_initcall(ar7_init_console);
68 
69 /*
70  * Initializes basic routines and structures pointers, memory size (as
71  * given by the bios and saves the command line.
72  */
73 
74 void __init plat_mem_setup(void)
75 {
76 	unsigned long io_base;
77 
78 	_machine_restart = ar7_machine_restart;
79 	_machine_halt = ar7_machine_halt;
80 	pm_power_off = ar7_machine_power_off;
81 	panic_timeout = 3;
82 
83 	io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
84 	if (!io_base)
85 		panic("Can't remap IO base!\n");
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(),
92 		ar7_chip_id(), ar7_chip_rev());
93 }
94