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/mtd/physmap.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/m48t86.h>
  22 #include <asm/io.h>
  23 #include <asm/hardware.h>
  24 #include <asm/mach-types.h>
  25 #include <asm/mach/arch.h>
  26 #include <asm/mach/map.h>
  27
  28 static struct map_desc ts72xx_io_desc[] __initdata = {
  29         {
  30                 .virtual        = TS72XX_MODEL_VIRT_BASE,
  31                 .pfn            = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
  32                 .length         = TS72XX_MODEL_SIZE,
  33                 .type           = MT_DEVICE,
  34         }, {
  35                 .virtual        = TS72XX_OPTIONS_VIRT_BASE,
  36                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
  37                 .length         = TS72XX_OPTIONS_SIZE,
  38                 .type           = MT_DEVICE,
  39         }, {
  40                 .virtual        = TS72XX_OPTIONS2_VIRT_BASE,
  41                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
  42                 .length         = TS72XX_OPTIONS2_SIZE,
  43                 .type           = MT_DEVICE,
  44         }, {
  45                 .virtual        = TS72XX_RTC_INDEX_VIRT_BASE,
  46                 .pfn            = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
  47                 .length         = TS72XX_RTC_INDEX_SIZE,
  48                 .type           = MT_DEVICE,
  49         }, {
  50                 .virtual        = TS72XX_RTC_DATA_VIRT_BASE,
  51                 .pfn            = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
  52                 .length         = TS72XX_RTC_DATA_SIZE,
  53                 .type           = MT_DEVICE,
  54         }
  55 };
  56
  57 static struct map_desc ts72xx_nand_io_desc[] __initdata = {
  58         {
  59                 .virtual        = TS72XX_NAND_DATA_VIRT_BASE,
  60                 .pfn            = __phys_to_pfn(TS72XX_NAND1_DATA_PHYS_BASE),
  61                 .length         = TS72XX_NAND_DATA_SIZE,
  62                 .type           = MT_DEVICE,
  63         }, {
  64                 .virtual        = TS72XX_NAND_CONTROL_VIRT_BASE,
  65                 .pfn            = __phys_to_pfn(TS72XX_NAND1_CONTROL_PHYS_BASE),
  66                 .length         = TS72XX_NAND_CONTROL_SIZE,
  67                 .type           = MT_DEVICE,
  68         }, {
  69                 .virtual        = TS72XX_NAND_BUSY_VIRT_BASE,
  70                 .pfn            = __phys_to_pfn(TS72XX_NAND1_BUSY_PHYS_BASE),
  71                 .length         = TS72XX_NAND_BUSY_SIZE,
  72                 .type           = MT_DEVICE,
  73         }
  74 };
  75
  76 static struct map_desc ts72xx_alternate_nand_io_desc[] __initdata = {
  77         {
  78                 .virtual        = TS72XX_NAND_DATA_VIRT_BASE,
  79                 .pfn            = __phys_to_pfn(TS72XX_NAND2_DATA_PHYS_BASE),
  80                 .length         = TS72XX_NAND_DATA_SIZE,
  81                 .type           = MT_DEVICE,
  82         }, {
  83                 .virtual        = TS72XX_NAND_CONTROL_VIRT_BASE,
  84                 .pfn            = __phys_to_pfn(TS72XX_NAND2_CONTROL_PHYS_BASE),
  85                 .length         = TS72XX_NAND_CONTROL_SIZE,
  86                 .type           = MT_DEVICE,
  87         }, {
  88                 .virtual        = TS72XX_NAND_BUSY_VIRT_BASE,
  89                 .pfn            = __phys_to_pfn(TS72XX_NAND2_BUSY_PHYS_BASE),
  90                 .length         = TS72XX_NAND_BUSY_SIZE,
  91                 .type           = MT_DEVICE,
  92         }
  93 };
  94
  95 static void __init ts72xx_map_io(void)
  96 {
  97         ep93xx_map_io();
  98         iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
  99
 100         /*
 101          * The TS-7200 has NOR flash, the other models have NAND flash.
 102          */
 103         if (!board_is_ts7200()) {
 104                 if (is_ts9420_installed()) {
 105                         iotable_init(ts72xx_alternate_nand_io_desc,
 106                                 ARRAY_SIZE(ts72xx_alternate_nand_io_desc));
 107                 } else {
 108                         iotable_init(ts72xx_nand_io_desc,
 109                                 ARRAY_SIZE(ts72xx_nand_io_desc));
 110                 }
 111         }
 112 }
 113
 114 static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
 115 {
 116         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
 117         return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
 118 }
 119
 120 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
 121 {
 122         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
 123         __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
 124 }
 125
 126 static struct m48t86_ops ts72xx_rtc_ops = {
 127         .readbyte               = ts72xx_rtc_readbyte,
 128         .writebyte              = ts72xx_rtc_writebyte,
 129 };
 130
 131 static struct platform_device ts72xx_rtc_device = {
 132         .name                   = "rtc-m48t86",
 133         .id                     = -1,
 134         .dev                    = {
 135                 .platform_data          = &ts72xx_rtc_ops,
 136         },
 137         .num_resources          = 0,
 138 };
 139
 140 static void __init ts72xx_init_machine(void)
 141 {
 142         ep93xx_init_devices();
 143         if (board_is_ts7200())
 144                 physmap_configure(TS72XX_NOR_PHYS_BASE, 0x01000000, 1, NULL);
 145         platform_device_register(&ts72xx_rtc_device);
 146 }
 147
 148 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
 149         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 150         .phys_io        = EP93XX_APB_PHYS_BASE,
 151         .io_pg_offst    = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
 152         .boot_params    = 0x00000100,
 153         .map_io         = ts72xx_map_io,
 154         .init_irq       = ep93xx_init_irq,
 155         .timer          = &ep93xx_timer,
 156         .init_machine   = ts72xx_init_machine,
 157 MACHINE_END