arch/arm/mach-clps711x/p720t.c

   1 /*
   2  *  linux/arch/arm/mach-clps711x/p720t.c
   3  *
   4  *  Copyright (C) 2000-2001 Deep Blue Solutions Ltd
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/types.h>
  23 #include <linux/string.h>
  24 #include <linux/mm.h>
  25 #include <linux/io.h>
  26
  27 #include <mach/hardware.h>
  28 #include <asm/pgtable.h>
  29 #include <asm/page.h>
  30 #include <asm/setup.h>
  31 #include <asm/sizes.h>
  32 #include <asm/mach-types.h>
  33 #include <asm/mach/arch.h>
  34 #include <asm/mach/map.h>
  35 #include <mach/syspld.h>
  36
  37 #include "common.h"
  38
  39 /*
  40  * Map the P720T system PLD.  It occupies two address spaces:
  41  *  SYSPLD_PHYS_BASE and SYSPLD_PHYS_BASE + 0x00400000
  42  * We map both here.
  43  */
  44 static struct map_desc p720t_io_desc[] __initdata = {
  45         {
  46                 .virtual        = SYSPLD_VIRT_BASE,
  47                 .pfn            = __phys_to_pfn(SYSPLD_PHYS_BASE),
  48                 .length         = SZ_1M,
  49                 .type           = MT_DEVICE
  50         }, {
  51                 .virtual        = 0xfe400000,
  52                 .pfn            = __phys_to_pfn(0x10400000),
  53                 .length         = SZ_1M,
  54                 .type           = MT_DEVICE
  55         }
  56 };
  57
  58 static void __init
  59 fixup_p720t(struct tag *tag, char **cmdline, struct meminfo *mi)
  60 {
  61         /*
  62          * Our bootloader doesn't setup any tags (yet).
  63          */
  64         if (tag->hdr.tag != ATAG_CORE) {
  65                 tag->hdr.tag = ATAG_CORE;
  66                 tag->hdr.size = tag_size(tag_core);
  67                 tag->u.core.flags = 0;
  68                 tag->u.core.pagesize = PAGE_SIZE;
  69                 tag->u.core.rootdev = 0x0100;
  70
  71                 tag = tag_next(tag);
  72                 tag->hdr.tag = ATAG_MEM;
  73                 tag->hdr.size = tag_size(tag_mem32);
  74                 tag->u.mem.size = 4096;
  75                 tag->u.mem.start = PHYS_OFFSET;
  76
  77                 tag = tag_next(tag);
  78                 tag->hdr.tag = ATAG_NONE;
  79                 tag->hdr.size = 0;
  80         }
  81 }
  82
  83 static void __init p720t_map_io(void)
  84 {
  85         clps711x_map_io();
  86         iotable_init(p720t_io_desc, ARRAY_SIZE(p720t_io_desc));
  87 }
  88
  89 static void __init p720t_init_early(void)
  90 {
  91         /*
  92          * Power down as much as possible in case we don't
  93          * have the drivers loaded.
  94          */
  95         PLD_LCDEN = 0;
  96         PLD_PWR  &= ~(PLD_S4_ON|PLD_S3_ON|PLD_S2_ON|PLD_S1_ON);
  97
  98         PLD_KBD   = 0;
  99         PLD_IO    = 0;
 100         PLD_IRDA  = 0;
 101         PLD_CODEC = 0;
 102         PLD_TCH   = 0;
 103         PLD_SPI   = 0;
 104         if (!IS_ENABLED(CONFIG_DEBUG_LL)) {
 105                 PLD_COM2 = 0;
 106                 PLD_COM1 = 0;
 107         }
 108 }
 109
 110 MACHINE_START(P720T, "ARM-Prospector720T")
 111         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
 112         .atag_offset    = 0x100,
 113         .fixup          = fixup_p720t,
 114         .init_early     = p720t_init_early,
 115         .map_io         = p720t_map_io,
 116         .init_irq       = clps711x_init_irq,
 117         .timer          = &clps711x_timer,
 118         .restart        = clps711x_restart,
 119 MACHINE_END