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 #include <linux/slab.h>
  27 #include <linux/leds.h>
  28 #include <linux/platform_device.h>
  29
  30 #include <mach/hardware.h>
  31 #include <asm/pgtable.h>
  32 #include <asm/page.h>
  33 #include <asm/setup.h>
  34 #include <asm/sizes.h>
  35 #include <asm/mach-types.h>
  36 #include <asm/mach/arch.h>
  37 #include <asm/mach/map.h>
  38 #include <mach/syspld.h>
  39
  40 #include "common.h"
  41
  42 #define GPIO_USERLED    CLPS711X_GPIO(3, 0)
  43
  44 /*
  45  * Map the P720T system PLD. It occupies two address spaces:
  46  * 0x10000000 and 0x10400000. We map both regions as one.
  47  */
  48 static struct map_desc p720t_io_desc[] __initdata = {
  49         {
  50                 .virtual        = SYSPLD_VIRT_BASE,
  51                 .pfn            = __phys_to_pfn(SYSPLD_PHYS_BASE),
  52                 .length         = SZ_8M,
  53                 .type           = MT_DEVICE,
  54         },
  55 };
  56
  57 static void __init
  58 fixup_p720t(struct tag *tag, char **cmdline, struct meminfo *mi)
  59 {
  60         /*
  61          * Our bootloader doesn't setup any tags (yet).
  62          */
  63         if (tag->hdr.tag != ATAG_CORE) {
  64                 tag->hdr.tag = ATAG_CORE;
  65                 tag->hdr.size = tag_size(tag_core);
  66                 tag->u.core.flags = 0;
  67                 tag->u.core.pagesize = PAGE_SIZE;
  68                 tag->u.core.rootdev = 0x0100;
  69
  70                 tag = tag_next(tag);
  71                 tag->hdr.tag = ATAG_MEM;
  72                 tag->hdr.size = tag_size(tag_mem32);
  73                 tag->u.mem.size = 4096;
  74                 tag->u.mem.start = PHYS_OFFSET;
  75
  76                 tag = tag_next(tag);
  77                 tag->hdr.tag = ATAG_NONE;
  78                 tag->hdr.size = 0;
  79         }
  80 }
  81
  82 static void __init p720t_map_io(void)
  83 {
  84         clps711x_map_io();
  85         iotable_init(p720t_io_desc, ARRAY_SIZE(p720t_io_desc));
  86 }
  87
  88 static void __init p720t_init_early(void)
  89 {
  90         /*
  91          * Power down as much as possible in case we don't
  92          * have the drivers loaded.
  93          */
  94         PLD_LCDEN = 0;
  95         PLD_PWR  &= ~(PLD_S4_ON|PLD_S3_ON|PLD_S2_ON|PLD_S1_ON);
  96
  97         PLD_KBD   = 0;
  98         PLD_IO    = 0;
  99         PLD_IRDA  = 0;
 100         PLD_CODEC = 0;
 101         PLD_TCH   = 0;
 102         PLD_SPI   = 0;
 103         if (!IS_ENABLED(CONFIG_DEBUG_LL)) {
 104                 PLD_COM2 = 0;
 105                 PLD_COM1 = 0;
 106         }
 107 }
 108
 109 static struct gpio_led p720t_gpio_leds[] = {
 110         {
 111                 .name                   = "User LED",
 112                 .default_trigger        = "heartbeat",
 113                 .gpio                   = GPIO_USERLED,
 114         },
 115 };
 116
 117 static struct gpio_led_platform_data p720t_gpio_led_pdata __initdata = {
 118         .leds           = p720t_gpio_leds,
 119         .num_leds       = ARRAY_SIZE(p720t_gpio_leds),
 120 };
 121
 122 static void __init p720t_init_late(void)
 123 {
 124         platform_device_register_data(&platform_bus, "leds-gpio", 0,
 125                                       &p720t_gpio_led_pdata,
 126                                       sizeof(p720t_gpio_led_pdata));
 127 }
 128
 129 MACHINE_START(P720T, "ARM-Prospector720T")
 130         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
 131         .atag_offset    = 0x100,
 132         .fixup          = fixup_p720t,
 133         .map_io         = p720t_map_io,
 134         .init_early     = p720t_init_early,
 135         .init_irq       = clps711x_init_irq,
 136         .timer          = &clps711x_timer,
 137         .init_late      = p720t_init_late,
 138         .restart        = clps711x_restart,
 139 MACHINE_END