target/linux/ar7/files/arch/mips/ar7/setup.c

   1 /*
   2  * $Id$
   3  *
   4  * Copyright (C) 2006, 2007 OpenWrt.org
   5  *
   6  * Carsten Langgaard, carstenl@mips.com
   7  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
   8  *
   9  *  This program is free software; you can distribute it and/or modify it
  10  *  under the terms of the GNU General Public License (Version 2) as
  11  *  published by the Free Software Foundation.
  12  *
  13  *  This program is distributed in the hope it will be useful, but WITHOUT
  14  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16  *  for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License along
  19  *  with this program; if not, write to the Free Software Foundation, Inc.,
  20  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  21  */
  22 #include <linux/init.h>
  23 #include <linux/ioport.h>
  24 #include <linux/pm.h>
  25
  26 #include <asm/mips-boards/prom.h>
  27 #include <asm/reboot.h>
  28 #include <asm/time.h>
  29 #include <asm/ar7/ar7.h>
  30
  31 extern void ar7_time_init(void);
  32 static void ar7_machine_restart(char *command);
  33 static void ar7_machine_halt(void);
  34 static void ar7_machine_power_off(void);
  35
  36 static void ar7_machine_restart(char *command)
  37 {
  38         u32 *softres_reg = (u32 *)ioremap(AR7_REGS_RESET +
  39                                           AR7_RESET_SOFTWARE, 1);
  40         writel(1, softres_reg);
  41 }
  42
  43 static void ar7_machine_halt(void)
  44 {
  45         while (1);
  46 }
  47
  48 static void ar7_machine_power_off(void)
  49 {
  50         u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
  51         u32 power_state = readl(power_reg) | (3 << 30);
  52         writel(power_state, power_reg);
  53         ar7_machine_halt();
  54 }
  55
  56 const char *get_system_type(void)
  57 {
  58         u16 chip_id = ar7_chip_id();
  59         switch (chip_id) {
  60         case AR7_CHIP_7300:
  61                 return "TI AR7 (TNETD7300)";
  62         case AR7_CHIP_7100:
  63                 return "TI AR7 (TNETD7100)";
  64         case AR7_CHIP_7200:
  65                 return "TI AR7 (TNETD7200)";
  66         default:
  67                 return "TI AR7 (Unknown)";
  68         }
  69 }
  70
  71 static int __init ar7_init_console(void)
  72 {
  73         return 0;
  74 }
  75
  76 /*
  77  * Initializes basic routines and structures pointers, memory size (as
  78  * given by the bios and saves the command line.
  79  */
  80
  81 extern void ar7_init_clocks(void);
  82
  83 void __init plat_mem_setup(void)
  84 {
  85         unsigned long io_base;
  86
  87         _machine_restart = ar7_machine_restart;
  88         _machine_halt = ar7_machine_halt;
  89         pm_power_off = ar7_machine_power_off;
  90         board_time_init = ar7_time_init;
  91         panic_timeout = 3;
  92
  93         io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
  94         if (!io_base) panic("Can't remap IO base!\n");
  95         set_io_port_base(io_base);
  96
  97         prom_meminit();
  98         ar7_init_clocks();
  99
 100         ioport_resource.start = 0;
 101         ioport_resource.end   = ~0;
 102         iomem_resource.start  = 0;
 103         iomem_resource.end    = ~0;
 104
 105         printk("%s, ID: 0x%04x, Revision: 0x%02x\n", get_system_type(),
 106                 ar7_chip_id(), ar7_chip_rev());
 107 }
 108
 109 console_initcall(ar7_init_console);