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/gpio.h>
  27 #include <asm/ar7/prom.h>
  28
  29 static int titan_variant;  /*hold the results of the gpio_init_titan_variant() so that it is only called once*/
  30 static void ar7_machine_restart(char *command);
  31 static void ar7_machine_halt(void);
  32 static void ar7_machine_power_off(void);
  33
  34 static void ar7_machine_restart(char *command)
  35 {
  36         u32 *softres_reg = (u32 *)ioremap(AR7_REGS_RESET +
  37                                           AR7_RESET_SOFTWARE, 1);
  38         writel(1, softres_reg);
  39 }
  40
  41 static void ar7_machine_halt(void)
  42 {
  43         while (1);
  44 }
  45
  46 static void ar7_machine_power_off(void)
  47 {
  48         u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
  49         u32 power_state = readl(power_reg) | (3 << 30);
  50         writel(power_state, power_reg);
  51         ar7_machine_halt();
  52 }
  53
  54 const char *get_system_type(void)
  55 {
  56         u16 chip_id = ar7_chip_id();
  57         switch (chip_id) {
  58         case AR7_CHIP_7300:
  59                 return "TI AR7 (TNETD7300)";
  60         case AR7_CHIP_7100:
  61                 return "TI AR7 (TNETD7100)";
  62         case AR7_CHIP_7200:
  63                 return "TI AR7 (TNETD7200)";
  64         case AR7_CHIP_TITAN:
  65                 titan_variant = ar7_init_titan_variant();
  66                 switch (titan_variant /*(gpio_get_value_titan(1) >> 12) & 0xf*/) {
  67                 case TITAN_CHIP_1050:
  68                         return "TI AR7 (TNETV1050)";
  69                 case TITAN_CHIP_1055:
  70                         return "TI AR7 (TNETV1055)";
  71                 case TITAN_CHIP_1056:
  72                         return "TI AR7 (TNETV1056)";
  73                 case TITAN_CHIP_1060:
  74                         return "TI AR7 (TNETV1060)";
  75                 }
  76         default:
  77                 return "TI AR7 (Unknown)";
  78         }
  79 }
  80
  81 static int __init ar7_init_console(void)
  82 {
  83         return 0;
  84 }
  85
  86 /*
  87  * Initializes basic routines and structures pointers, memory size (as
  88  * given by the bios and saves the command line.
  89  */
  90
  91 extern void ar7_init_clocks(void);
  92
  93 void __init plat_mem_setup(void)
  94 {
  95         unsigned long io_base;
  96
  97         _machine_restart = ar7_machine_restart;
  98         _machine_halt = ar7_machine_halt;
  99         pm_power_off = ar7_machine_power_off;
 100         panic_timeout = 3;
 101
 102         io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
 103         if (!io_base) panic("Can't remap IO base!\n");
 104         set_io_port_base(io_base);
 105
 106         prom_meminit();
 107         ar7_init_clocks();
 108
 109         ioport_resource.start = 0;
 110         ioport_resource.end   = ~0;
 111         iomem_resource.start  = 0;
 112         iomem_resource.end    = ~0;
 113
 114         printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
 115                                         get_system_type(),
 116                 ar7_chip_id(), ar7_chip_rev());
 117 }
 118
 119 console_initcall(ar7_init_console);