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 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24) /* TODO remove when 2.6.24 is stable */
  29 extern void ar7_time_init(void);
  30 #endif
  31 static void ar7_machine_restart(char *command);
  32 static void ar7_machine_halt(void);
  33 static void ar7_machine_power_off(void);
  34
  35 static void ar7_machine_restart(char *command)
  36 {
  37         u32 *softres_reg = (u32 *)ioremap(AR7_REGS_RESET +
  38                                           AR7_RESET_SOFTWARE, 1);
  39         writel(1, softres_reg);
  40 }
  41
  42 static void ar7_machine_halt(void)
  43 {
  44         while (1);
  45 }
  46
  47 static void ar7_machine_power_off(void)
  48 {
  49         u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
  50         u32 power_state = readl(power_reg) | (3 << 30);
  51         writel(power_state, power_reg);
  52         ar7_machine_halt();
  53 }
  54
  55 const char *get_system_type(void)
  56 {
  57         u16 chip_id = ar7_chip_id();
  58         switch (chip_id) {
  59         case AR7_CHIP_7300:
  60                 return "TI AR7 (TNETD7300)";
  61         case AR7_CHIP_7100:
  62                 return "TI AR7 (TNETD7100)";
  63         case AR7_CHIP_7200:
  64                 return "TI AR7 (TNETD7200)";
  65         default:
  66                 return "TI AR7 (Unknown)";
  67         }
  68 }
  69
  70 static int __init ar7_init_console(void)
  71 {
  72         return 0;
  73 }
  74
  75 /*
  76  * Initializes basic routines and structures pointers, memory size (as
  77  * given by the bios and saves the command line.
  78  */
  79
  80 extern void ar7_init_clocks(void);
  81
  82 void __init plat_mem_setup(void)
  83 {
  84         unsigned long io_base;
  85
  86         _machine_restart = ar7_machine_restart;
  87         _machine_halt = ar7_machine_halt;
  88         pm_power_off = ar7_machine_power_off;
  89 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24) /* TODO remove when 2.6.24 is stable */
  90         board_time_init = ar7_time_init;
  91 #endif
  92         panic_timeout = 3;
  93
  94         io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
  95         if (!io_base) panic("Can't remap IO base!\n");
  96         set_io_port_base(io_base);
  97
  98         prom_meminit();
  99         ar7_init_clocks();
 100
 101         ioport_resource.start = 0;
 102         ioport_resource.end   = ~0;
 103         iomem_resource.start  = 0;
 104         iomem_resource.end    = ~0;
 105
 106         printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
 107                                         get_system_type(),
 108                 ar7_chip_id(), ar7_chip_rev());
 109 }
 110
 111 console_initcall(ar7_init_console);