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

   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/version.h>
  19 #include <linux/init.h>
  20 #include <linux/ioport.h>
  21 #include <linux/pm.h>
  22
  23 #include <asm/reboot.h>
  24 #include <asm/time.h>
  25 #include <asm/ar7/ar7.h>
  26 #include <asm/ar7/prom.h>
  27
  28 static void ar7_machine_restart(char *command);
  29 static void ar7_machine_halt(void);
  30 static void ar7_machine_power_off(void);
  31
  32 static void ar7_machine_restart(char *command)
  33 {
  34         u32 *softres_reg = (u32 *)ioremap(AR7_REGS_RESET +
  35                                           AR7_RESET_SOFTWARE, 1);
  36         writel(1, softres_reg);
  37 }
  38
  39 static void ar7_machine_halt(void)
  40 {
  41         while (1);
  42 }
  43
  44 static void ar7_machine_power_off(void)
  45 {
  46         u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
  47         u32 power_state = readl(power_reg) | (3 << 30);
  48         writel(power_state, power_reg);
  49         ar7_machine_halt();
  50 }
  51
  52 const char *get_system_type(void)
  53 {
  54         u16 chip_id = ar7_chip_id();
  55         switch (chip_id) {
  56         case AR7_CHIP_7300:
  57                 return "TI AR7 (TNETD7300)";
  58         case AR7_CHIP_7100:
  59                 return "TI AR7 (TNETD7100)";
  60         case AR7_CHIP_7200:
  61                 return "TI AR7 (TNETD7200)";
  62         default:
  63                 return "TI AR7 (Unknown)";
  64         }
  65 }
  66
  67 static int __init ar7_init_console(void)
  68 {
  69         return 0;
  70 }
  71
  72 /*
  73  * Initializes basic routines and structures pointers, memory size (as
  74  * given by the bios and saves the command line.
  75  */
  76
  77 extern void ar7_init_clocks(void);
  78
  79 void __init plat_mem_setup(void)
  80 {
  81         unsigned long io_base;
  82
  83         _machine_restart = ar7_machine_restart;
  84         _machine_halt = ar7_machine_halt;
  85         pm_power_off = ar7_machine_power_off;
  86         panic_timeout = 3;
  87
  88         io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
  89         if (!io_base) panic("Can't remap IO base!\n");
  90         set_io_port_base(io_base);
  91
  92         prom_meminit();
  93         ar7_init_clocks();
  94
  95         ioport_resource.start = 0;
  96         ioport_resource.end   = ~0;
  97         iomem_resource.start  = 0;
  98         iomem_resource.end    = ~0;
  99
 100         printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
 101                                         get_system_type(),
 102                 ar7_chip_id(), ar7_chip_rev());
 103 }
 104
 105 console_initcall(ar7_init_console);