arch/arm/mach-ep93xx/ts72xx.c

   1 /*
   2  * arch/arm/mach-ep93xx/ts72xx.c
   3  * Technologic Systems TS72xx SBC support.
   4  *
   5  * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or (at
  10  * your option) any later version.
  11  */
  12
  13 #include <linux/config.h>
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/mm.h>
  17 #include <linux/sched.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/ioport.h>
  20 #include <linux/mtd/physmap.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/m48t86.h>
  23 #include <asm/io.h>
  24 #include <asm/hardware.h>
  25 #include <asm/mach-types.h>
  26 #include <asm/mach/arch.h>
  27 #include <asm/mach/map.h>
  28
  29 static struct map_desc ts72xx_io_desc[] __initdata = {
  30         {
  31                 .virtual        = TS72XX_MODEL_VIRT_BASE,
  32                 .pfn            = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
  33                 .length         = TS72XX_MODEL_SIZE,
  34                 .type           = MT_DEVICE,
  35         }, {
  36                 .virtual        = TS72XX_OPTIONS_VIRT_BASE,
  37                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
  38                 .length         = TS72XX_OPTIONS_SIZE,
  39                 .type           = MT_DEVICE,
  40         }, {
  41                 .virtual        = TS72XX_OPTIONS2_VIRT_BASE,
  42                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
  43                 .length         = TS72XX_OPTIONS2_SIZE,
  44                 .type           = MT_DEVICE,
  45         }, {
  46                 .virtual        = TS72XX_RTC_INDEX_VIRT_BASE,
  47                 .pfn            = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
  48                 .length         = TS72XX_RTC_INDEX_SIZE,
  49                 .type           = MT_DEVICE,
  50         }, {
  51                 .virtual        = TS72XX_RTC_DATA_VIRT_BASE,
  52                 .pfn            = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
  53                 .length         = TS72XX_RTC_DATA_SIZE,
  54                 .type           = MT_DEVICE,
  55         }
  56 };
  57
  58 static struct map_desc ts72xx_nand_io_desc[] __initdata = {
  59         {
  60                 .virtual        = TS72XX_NAND_DATA_VIRT_BASE,
  61                 .pfn            = __phys_to_pfn(TS72XX_NAND1_DATA_PHYS_BASE),
  62                 .length         = TS72XX_NAND_DATA_SIZE,
  63                 .type           = MT_DEVICE,
  64         }, {
  65                 .virtual        = TS72XX_NAND_CONTROL_VIRT_BASE,
  66                 .pfn            = __phys_to_pfn(TS72XX_NAND1_CONTROL_PHYS_BASE),
  67                 .length         = TS72XX_NAND_CONTROL_SIZE,
  68                 .type           = MT_DEVICE,
  69         }, {
  70                 .virtual        = TS72XX_NAND_BUSY_VIRT_BASE,
  71                 .pfn            = __phys_to_pfn(TS72XX_NAND1_BUSY_PHYS_BASE),
  72                 .length         = TS72XX_NAND_BUSY_SIZE,
  73                 .type           = MT_DEVICE,
  74         }
  75 };
  76
  77 static struct map_desc ts72xx_alternate_nand_io_desc[] __initdata = {
  78         {
  79                 .virtual        = TS72XX_NAND_DATA_VIRT_BASE,
  80                 .pfn            = __phys_to_pfn(TS72XX_NAND2_DATA_PHYS_BASE),
  81                 .length         = TS72XX_NAND_DATA_SIZE,
  82                 .type           = MT_DEVICE,
  83         }, {
  84                 .virtual        = TS72XX_NAND_CONTROL_VIRT_BASE,
  85                 .pfn            = __phys_to_pfn(TS72XX_NAND2_CONTROL_PHYS_BASE),
  86                 .length         = TS72XX_NAND_CONTROL_SIZE,
  87                 .type           = MT_DEVICE,
  88         }, {
  89                 .virtual        = TS72XX_NAND_BUSY_VIRT_BASE,
  90                 .pfn            = __phys_to_pfn(TS72XX_NAND2_BUSY_PHYS_BASE),
  91                 .length         = TS72XX_NAND_BUSY_SIZE,
  92                 .type           = MT_DEVICE,
  93         }
  94 };
  95
  96 static void __init ts72xx_map_io(void)
  97 {
  98         ep93xx_map_io();
  99         iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
 100
 101         /*
 102          * The TS-7200 has NOR flash, the other models have NAND flash.
 103          */
 104         if (!board_is_ts7200()) {
 105                 if (is_ts9420_installed()) {
 106                         iotable_init(ts72xx_alternate_nand_io_desc,
 107                                 ARRAY_SIZE(ts72xx_alternate_nand_io_desc));
 108                 } else {
 109                         iotable_init(ts72xx_nand_io_desc,
 110                                 ARRAY_SIZE(ts72xx_nand_io_desc));
 111                 }
 112         }
 113 }
 114
 115 static struct physmap_flash_data ts72xx_flash_data = {
 116         .width          = 1,
 117 };
 118
 119 static struct resource ts72xx_flash_resource = {
 120         .start          = TS72XX_NOR_PHYS_BASE,
 121         .end            = TS72XX_NOR_PHYS_BASE + 0x00ffffff,
 122         .flags          = IORESOURCE_MEM,
 123 };
 124
 125 static struct platform_device ts72xx_flash = {
 126         .name           = "physmap-flash",
 127         .id             = 0,
 128         .dev            = {
 129                 .platform_data  = &ts72xx_flash_data,
 130         },
 131         .num_resources  = 1,
 132         .resource       = &ts72xx_flash_resource,
 133 };
 134
 135 static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
 136 {
 137         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
 138         return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
 139 }
 140
 141 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
 142 {
 143         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
 144         __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
 145 }
 146
 147 static struct m48t86_ops ts72xx_rtc_ops = {
 148         .readbyte               = ts72xx_rtc_readbyte,
 149         .writebyte              = ts72xx_rtc_writebyte,
 150 };
 151
 152 static struct platform_device ts72xx_rtc_device = {
 153         .name                   = "rtc-m48t86",
 154         .id                     = -1,
 155         .dev                    = {
 156                 .platform_data          = &ts72xx_rtc_ops,
 157         },
 158         .num_resources          = 0,
 159 };
 160
 161 static void __init ts72xx_init_machine(void)
 162 {
 163         ep93xx_init_devices();
 164         if (board_is_ts7200())
 165                 platform_device_register(&ts72xx_flash);
 166         platform_device_register(&ts72xx_rtc_device);
 167 }
 168
 169 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
 170         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 171         .phys_io        = EP93XX_APB_PHYS_BASE,
 172         .io_pg_offst    = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
 173         .boot_params    = 0x00000100,
 174         .map_io         = ts72xx_map_io,
 175         .init_irq       = ep93xx_init_irq,
 176         .timer          = &ep93xx_timer,
 177         .init_machine   = ts72xx_init_machine,
 178 MACHINE_END