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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  14
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/io.h>
  19 #include <linux/mtd/nand.h>
  20 #include <linux/mtd/partitions.h>
  21
  22 #include <mach/hardware.h>
  23
  24 #include <asm/mach-types.h>
  25 #include <asm/mach/map.h>
  26 #include <asm/mach/arch.h>
  27
  28 #include "soc.h"
  29 #include "ts72xx.h"
  30
  31 static struct map_desc ts72xx_io_desc[] __initdata = {
  32         {
  33                 .virtual        = (unsigned long)TS72XX_MODEL_VIRT_BASE,
  34                 .pfn            = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
  35                 .length         = TS72XX_MODEL_SIZE,
  36                 .type           = MT_DEVICE,
  37         }, {
  38                 .virtual        = (unsigned long)TS72XX_OPTIONS_VIRT_BASE,
  39                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
  40                 .length         = TS72XX_OPTIONS_SIZE,
  41                 .type           = MT_DEVICE,
  42         }, {
  43                 .virtual        = (unsigned long)TS72XX_OPTIONS2_VIRT_BASE,
  44                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
  45                 .length         = TS72XX_OPTIONS2_SIZE,
  46                 .type           = MT_DEVICE,
  47         }
  48 };
  49
  50 static void __init ts72xx_map_io(void)
  51 {
  52         ep93xx_map_io();
  53         iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
  54 }
  55
  56
  57 /*************************************************************************
  58  * NAND flash
  59  *************************************************************************/
  60 #define TS72XX_NAND_CONTROL_ADDR_LINE   22      /* 0xN0400000 */
  61 #define TS72XX_NAND_BUSY_ADDR_LINE      23      /* 0xN0800000 */
  62
  63 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
  64                                   int cmd, unsigned int ctrl)
  65 {
  66         struct nand_chip *chip = mtd_to_nand(mtd);
  67
  68         if (ctrl & NAND_CTRL_CHANGE) {
  69                 void __iomem *addr = chip->IO_ADDR_R;
  70                 unsigned char bits;
  71
  72                 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
  73
  74                 bits = __raw_readb(addr) & ~0x07;
  75                 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
  76                 bits |= (ctrl & NAND_CLE);      /* bit 1 -> bit 1 */
  77                 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
  78
  79                 __raw_writeb(bits, addr);
  80         }
  81
  82         if (cmd != NAND_CMD_NONE)
  83                 __raw_writeb(cmd, chip->IO_ADDR_W);
  84 }
  85
  86 static int ts72xx_nand_device_ready(struct mtd_info *mtd)
  87 {
  88         struct nand_chip *chip = mtd_to_nand(mtd);
  89         void __iomem *addr = chip->IO_ADDR_R;
  90
  91         addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
  92
  93         return !!(__raw_readb(addr) & 0x20);
  94 }
  95
  96 #define TS72XX_BOOTROM_PART_SIZE        (SZ_16K)
  97 #define TS72XX_REDBOOT_PART_SIZE        (SZ_2M + SZ_1M)
  98
  99 static struct mtd_partition ts72xx_nand_parts[] = {
 100         {
 101                 .name           = "TS-BOOTROM",
 102                 .offset         = 0,
 103                 .size           = TS72XX_BOOTROM_PART_SIZE,
 104                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 105         }, {
 106                 .name           = "Linux",
 107                 .offset         = MTDPART_OFS_RETAIN,
 108                 .size           = TS72XX_REDBOOT_PART_SIZE,
 109                                 /* leave so much for last partition */
 110         }, {
 111                 .name           = "RedBoot",
 112                 .offset         = MTDPART_OFS_APPEND,
 113                 .size           = MTDPART_SIZ_FULL,
 114                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 115         },
 116 };
 117
 118 static struct platform_nand_data ts72xx_nand_data = {
 119         .chip = {
 120                 .nr_chips       = 1,
 121                 .chip_offset    = 0,
 122                 .chip_delay     = 15,
 123                 .partitions     = ts72xx_nand_parts,
 124                 .nr_partitions  = ARRAY_SIZE(ts72xx_nand_parts),
 125         },
 126         .ctrl = {
 127                 .cmd_ctrl       = ts72xx_nand_hwcontrol,
 128                 .dev_ready      = ts72xx_nand_device_ready,
 129         },
 130 };
 131
 132 static struct resource ts72xx_nand_resource[] = {
 133         {
 134                 .start          = 0,                    /* filled in later */
 135                 .end            = 0,                    /* filled in later */
 136                 .flags          = IORESOURCE_MEM,
 137         },
 138 };
 139
 140 static struct platform_device ts72xx_nand_flash = {
 141         .name                   = "gen_nand",
 142         .id                     = -1,
 143         .dev.platform_data      = &ts72xx_nand_data,
 144         .resource               = ts72xx_nand_resource,
 145         .num_resources          = ARRAY_SIZE(ts72xx_nand_resource),
 146 };
 147
 148
 149 static void __init ts72xx_register_flash(void)
 150 {
 151         /*
 152          * TS7200 has NOR flash all other TS72xx board have NAND flash.
 153          */
 154         if (board_is_ts7200()) {
 155                 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
 156         } else {
 157                 resource_size_t start;
 158
 159                 if (is_ts9420_installed())
 160                         start = EP93XX_CS7_PHYS_BASE;
 161                 else
 162                         start = EP93XX_CS6_PHYS_BASE;
 163
 164                 ts72xx_nand_resource[0].start = start;
 165                 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
 166
 167                 platform_device_register(&ts72xx_nand_flash);
 168         }
 169 }
 170
 171 /*************************************************************************
 172  * RTC M48T86
 173  *************************************************************************/
 174 #define TS72XX_RTC_INDEX_PHYS_BASE      (EP93XX_CS1_PHYS_BASE + 0x00800000)
 175 #define TS72XX_RTC_DATA_PHYS_BASE       (EP93XX_CS1_PHYS_BASE + 0x01700000)
 176
 177 static struct resource ts72xx_rtc_resources[] = {
 178         DEFINE_RES_MEM(TS72XX_RTC_INDEX_PHYS_BASE, 0x01),
 179         DEFINE_RES_MEM(TS72XX_RTC_DATA_PHYS_BASE, 0x01),
 180 };
 181
 182 static struct platform_device ts72xx_rtc_device = {
 183         .name           = "rtc-m48t86",
 184         .id             = -1,
 185         .resource       = ts72xx_rtc_resources,
 186         .num_resources  = ARRAY_SIZE(ts72xx_rtc_resources),
 187 };
 188
 189 static struct resource ts72xx_wdt_resources[] = {
 190         {
 191                 .start  = TS72XX_WDT_CONTROL_PHYS_BASE,
 192                 .end    = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
 193                 .flags  = IORESOURCE_MEM,
 194         },
 195         {
 196                 .start  = TS72XX_WDT_FEED_PHYS_BASE,
 197                 .end    = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
 198                 .flags  = IORESOURCE_MEM,
 199         },
 200 };
 201
 202 static struct platform_device ts72xx_wdt_device = {
 203         .name           = "ts72xx-wdt",
 204         .id             = -1,
 205         .num_resources  = ARRAY_SIZE(ts72xx_wdt_resources),
 206         .resource       = ts72xx_wdt_resources,
 207 };
 208
 209 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
 210         .phy_id         = 1,
 211 };
 212
 213 static void __init ts72xx_init_machine(void)
 214 {
 215         ep93xx_init_devices();
 216         ts72xx_register_flash();
 217         platform_device_register(&ts72xx_rtc_device);
 218         platform_device_register(&ts72xx_wdt_device);
 219
 220         ep93xx_register_eth(&ts72xx_eth_data, 1);
 221 }
 222
 223 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
 224         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 225         .atag_offset    = 0x100,
 226         .map_io         = ts72xx_map_io,
 227         .init_irq       = ep93xx_init_irq,
 228         .init_time      = ep93xx_timer_init,
 229         .init_machine   = ts72xx_init_machine,
 230         .init_late      = ep93xx_init_late,
 231         .restart        = ep93xx_restart,
 232 MACHINE_END