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
  29 #include <mach/hardware.h>
  30 #include <asm/pgtable.h>
  31 #include <asm/page.h>
  32 #include <asm/setup.h>
  33 #include <asm/sizes.h>
  34 #include <asm/mach-types.h>
  35 #include <asm/mach/arch.h>
  36 #include <asm/mach/map.h>
  37 #include <mach/syspld.h>
  38
  39 #include <asm/hardware/clps7111.h>
  40
  41 #include "common.h"
  42
  43 /*
  44  * Map the P720T system PLD.  It occupies two address spaces:
  45  *  SYSPLD_PHYS_BASE and SYSPLD_PHYS_BASE + 0x00400000
  46  * We map both here.
  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_1M,
  53                 .type           = MT_DEVICE
  54         }, {
  55                 .virtual        = 0xfe400000,
  56                 .pfn            = __phys_to_pfn(0x10400000),
  57                 .length         = SZ_1M,
  58                 .type           = MT_DEVICE
  59         }
  60 };
  61
  62 static void __init
  63 fixup_p720t(struct tag *tag, char **cmdline, struct meminfo *mi)
  64 {
  65         /*
  66          * Our bootloader doesn't setup any tags (yet).
  67          */
  68         if (tag->hdr.tag != ATAG_CORE) {
  69                 tag->hdr.tag = ATAG_CORE;
  70                 tag->hdr.size = tag_size(tag_core);
  71                 tag->u.core.flags = 0;
  72                 tag->u.core.pagesize = PAGE_SIZE;
  73                 tag->u.core.rootdev = 0x0100;
  74
  75                 tag = tag_next(tag);
  76                 tag->hdr.tag = ATAG_MEM;
  77                 tag->hdr.size = tag_size(tag_mem32);
  78                 tag->u.mem.size = 4096;
  79                 tag->u.mem.start = PHYS_OFFSET;
  80
  81                 tag = tag_next(tag);
  82                 tag->hdr.tag = ATAG_NONE;
  83                 tag->hdr.size = 0;
  84         }
  85 }
  86
  87 static void __init p720t_map_io(void)
  88 {
  89         clps711x_map_io();
  90         iotable_init(p720t_io_desc, ARRAY_SIZE(p720t_io_desc));
  91 }
  92
  93 static void __init p720t_init_early(void)
  94 {
  95         /*
  96          * Power down as much as possible in case we don't
  97          * have the drivers loaded.
  98          */
  99         PLD_LCDEN = 0;
 100         PLD_PWR  &= ~(PLD_S4_ON|PLD_S3_ON|PLD_S2_ON|PLD_S1_ON);
 101
 102         PLD_KBD   = 0;
 103         PLD_IO    = 0;
 104         PLD_IRDA  = 0;
 105         PLD_CODEC = 0;
 106         PLD_TCH   = 0;
 107         PLD_SPI   = 0;
 108         if (!IS_ENABLED(CONFIG_DEBUG_LL)) {
 109                 PLD_COM2 = 0;
 110                 PLD_COM1 = 0;
 111         }
 112 }
 113
 114 /*
 115  * LED controled by CPLD
 116  */
 117 #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
 118 static void p720t_led_set(struct led_classdev *cdev,
 119                               enum led_brightness b)
 120 {
 121         u8 reg = clps_readb(PDDR);
 122
 123         if (b != LED_OFF)
 124                 reg |= 0x1;
 125         else
 126                 reg &= ~0x1;
 127
 128         clps_writeb(reg, PDDR);
 129 }
 130
 131 static enum led_brightness p720t_led_get(struct led_classdev *cdev)
 132 {
 133         u8 reg = clps_readb(PDDR);
 134
 135         return (reg & 0x1) ? LED_FULL : LED_OFF;
 136 }
 137
 138 static int __init p720t_leds_init(void)
 139 {
 140
 141         struct led_classdev *cdev;
 142         int ret;
 143
 144         if (!machine_is_p720t())
 145                 return -ENODEV;
 146
 147         cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
 148         if (!cdev)
 149                 return -ENOMEM;
 150
 151         cdev->name = "p720t:0";
 152         cdev->brightness_set = p720t_led_set;
 153         cdev->brightness_get = p720t_led_get;
 154         cdev->default_trigger = "heartbeat";
 155
 156         ret = led_classdev_register(NULL, cdev);
 157         if (ret < 0) {
 158                 kfree(cdev);
 159                 return ret;
 160         }
 161
 162         return 0;
 163 }
 164
 165 /*
 166  * Since we may have triggers on any subsystem, defer registration
 167  * until after subsystem_init.
 168  */
 169 fs_initcall(p720t_leds_init);
 170 #endif
 171
 172 MACHINE_START(P720T, "ARM-Prospector720T")
 173         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
 174         .atag_offset    = 0x100,
 175         .fixup          = fixup_p720t,
 176         .init_early     = p720t_init_early,
 177         .map_io         = p720t_map_io,
 178         .init_irq       = clps711x_init_irq,
 179         .timer          = &clps711x_timer,
 180         .restart        = clps711x_restart,
 181 MACHINE_END