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

   1 /*
   2  * Copyright (C) 2006, 2007 OpenWrt.org
   3  *
   4  * Carsten Langgaard, carstenl@mips.com
   5  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
   6  *
   7  *  This program is free software; you can distribute it and/or modify it
   8  *  under the terms of the GNU General Public License (Version 2) as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope it will be useful, but WITHOUT
  12  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  *  for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License along
  17  *  with this program; if not, write to the Free Software Foundation, Inc.,
  18  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  19  */
  20 #include <linux/version.h>
  21 #include <linux/init.h>
  22 #include <linux/ioport.h>
  23 #include <linux/pm.h>
  24
  25 #include <asm/reboot.h>
  26 #include <asm/time.h>
  27 #include <asm/ar7/ar7.h>
  28 #include <asm/ar7/prom.h>
  29
  30 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24) /* TODO remove when 2.6.24 is stable */
  31 extern void ar7_time_init(void);
  32 #endif
  33 static void ar7_machine_restart(char *command);
  34 static void ar7_machine_halt(void);
  35 static void ar7_machine_power_off(void);
  36
  37 static void ar7_machine_restart(char *command)
  38 {
  39         u32 *softres_reg = (u32 *)ioremap(AR7_REGS_RESET +
  40                                           AR7_RESET_SOFTWARE, 1);
  41         writel(1, softres_reg);
  42 }
  43
  44 static void ar7_machine_halt(void)
  45 {
  46         while (1);
  47 }
  48
  49 static void ar7_machine_power_off(void)
  50 {
  51         u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
  52         u32 power_state = readl(power_reg) | (3 << 30);
  53         writel(power_state, power_reg);
  54         ar7_machine_halt();
  55 }
  56
  57 const char *get_system_type(void)
  58 {
  59         u16 chip_id = ar7_chip_id();
  60         switch (chip_id) {
  61         case AR7_CHIP_7300:
  62                 return "TI AR7 (TNETD7300)";
  63         case AR7_CHIP_7100:
  64                 return "TI AR7 (TNETD7100)";
  65         case AR7_CHIP_7200:
  66                 return "TI AR7 (TNETD7200)";
  67         default:
  68                 return "TI AR7 (Unknown)";
  69         }
  70 }
  71
  72 static int __init ar7_init_console(void)
  73 {
  74         return 0;
  75 }
  76
  77 /*
  78  * Initializes basic routines and structures pointers, memory size (as
  79  * given by the bios and saves the command line.
  80  */
  81
  82 extern void ar7_init_clocks(void);
  83
  84 void __init plat_mem_setup(void)
  85 {
  86         unsigned long io_base;
  87
  88         _machine_restart = ar7_machine_restart;
  89         _machine_halt = ar7_machine_halt;
  90         pm_power_off = ar7_machine_power_off;
  91 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24) /* TODO remove when 2.6.24 is stable */
  92         board_time_init = ar7_time_init;
  93 #endif
  94         panic_timeout = 3;
  95
  96         io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
  97         if (!io_base) panic("Can't remap IO base!\n");
  98         set_io_port_base(io_base);
  99
 100         prom_meminit();
 101         ar7_init_clocks();
 102
 103         ioport_resource.start = 0;
 104         ioport_resource.end   = ~0;
 105         iomem_resource.start  = 0;
 106         iomem_resource.end    = ~0;
 107
 108         printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
 109                                         get_system_type(),
 110                 ar7_chip_id(), ar7_chip_rev());
 111 }
 112
 113 console_initcall(ar7_init_console);