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/m48t86.h>
  20 #include <linux/mtd/physmap.h>
  21 #include <linux/mtd/nand.h>
  22 #include <linux/mtd/partitions.h>
  23
  24 #include <mach/hardware.h>
  25 #include <mach/ts72xx.h>
  26
  27 #include <asm/mach-types.h>
  28 #include <asm/mach/map.h>
  29 #include <asm/mach/arch.h>
  30
  31
  32 static struct map_desc ts72xx_io_desc[] __initdata = {
  33         {
  34                 .virtual        = TS72XX_MODEL_VIRT_BASE,
  35                 .pfn            = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
  36                 .length         = TS72XX_MODEL_SIZE,
  37                 .type           = MT_DEVICE,
  38         }, {
  39                 .virtual        = TS72XX_OPTIONS_VIRT_BASE,
  40                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
  41                 .length         = TS72XX_OPTIONS_SIZE,
  42                 .type           = MT_DEVICE,
  43         }, {
  44                 .virtual        = TS72XX_OPTIONS2_VIRT_BASE,
  45                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
  46                 .length         = TS72XX_OPTIONS2_SIZE,
  47                 .type           = MT_DEVICE,
  48         }, {
  49                 .virtual        = TS72XX_RTC_INDEX_VIRT_BASE,
  50                 .pfn            = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
  51                 .length         = TS72XX_RTC_INDEX_SIZE,
  52                 .type           = MT_DEVICE,
  53         }, {
  54                 .virtual        = TS72XX_RTC_DATA_VIRT_BASE,
  55                 .pfn            = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
  56                 .length         = TS72XX_RTC_DATA_SIZE,
  57                 .type           = MT_DEVICE,
  58         }
  59 };
  60
  61 static void __init ts72xx_map_io(void)
  62 {
  63         ep93xx_map_io();
  64         iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
  65 }
  66
  67
  68 /*************************************************************************
  69  * NAND flash
  70  *************************************************************************/
  71 #define TS72XX_NAND_CONTROL_ADDR_LINE   22      /* 0xN0400000 */
  72 #define TS72XX_NAND_BUSY_ADDR_LINE      23      /* 0xN0800000 */
  73
  74 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
  75                                   int cmd, unsigned int ctrl)
  76 {
  77         struct nand_chip *chip = mtd->priv;
  78
  79         if (ctrl & NAND_CTRL_CHANGE) {
  80                 void __iomem *addr = chip->IO_ADDR_R;
  81                 unsigned char bits;
  82
  83                 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
  84
  85                 bits = __raw_readb(addr) & ~0x07;
  86                 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
  87                 bits |= (ctrl & NAND_CLE);      /* bit 1 -> bit 1 */
  88                 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
  89
  90                 __raw_writeb(bits, addr);
  91         }
  92
  93         if (cmd != NAND_CMD_NONE)
  94                 __raw_writeb(cmd, chip->IO_ADDR_W);
  95 }
  96
  97 static int ts72xx_nand_device_ready(struct mtd_info *mtd)
  98 {
  99         struct nand_chip *chip = mtd->priv;
 100         void __iomem *addr = chip->IO_ADDR_R;
 101
 102         addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
 103
 104         return !!(__raw_readb(addr) & 0x20);
 105 }
 106
 107 static const char *ts72xx_nand_part_probes[] = { "cmdlinepart", NULL };
 108
 109 #define TS72XX_BOOTROM_PART_SIZE        (SZ_16K)
 110 #define TS72XX_REDBOOT_PART_SIZE        (SZ_2M + SZ_1M)
 111
 112 static struct mtd_partition ts72xx_nand_parts[] = {
 113         {
 114                 .name           = "TS-BOOTROM",
 115                 .offset         = 0,
 116                 .size           = TS72XX_BOOTROM_PART_SIZE,
 117                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 118         }, {
 119                 .name           = "Linux",
 120                 .offset         = MTDPART_OFS_APPEND,
 121                 .size           = 0,                    /* filled in later */
 122         }, {
 123                 .name           = "RedBoot",
 124                 .offset         = MTDPART_OFS_APPEND,
 125                 .size           = MTDPART_SIZ_FULL,
 126                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 127         },
 128 };
 129
 130 static void ts72xx_nand_set_parts(uint64_t size,
 131                                   struct platform_nand_chip *chip)
 132 {
 133         /* Factory TS-72xx boards only come with 32MiB or 128MiB NAND options */
 134         if (size == SZ_32M || size == SZ_128M) {
 135                 /* Set the "Linux" partition size */
 136                 ts72xx_nand_parts[1].size = size - TS72XX_REDBOOT_PART_SIZE;
 137
 138                 chip->partitions = ts72xx_nand_parts;
 139                 chip->nr_partitions = ARRAY_SIZE(ts72xx_nand_parts);
 140         } else {
 141                 pr_warning("Unknown nand disk size:%lluMiB\n", size >> 20);
 142         }
 143 }
 144
 145 static struct platform_nand_data ts72xx_nand_data = {
 146         .chip = {
 147                 .nr_chips       = 1,
 148                 .chip_offset    = 0,
 149                 .chip_delay     = 15,
 150                 .part_probe_types = ts72xx_nand_part_probes,
 151                 .set_parts      = ts72xx_nand_set_parts,
 152         },
 153         .ctrl = {
 154                 .cmd_ctrl       = ts72xx_nand_hwcontrol,
 155                 .dev_ready      = ts72xx_nand_device_ready,
 156         },
 157 };
 158
 159 static struct resource ts72xx_nand_resource[] = {
 160         {
 161                 .start          = 0,                    /* filled in later */
 162                 .end            = 0,                    /* filled in later */
 163                 .flags          = IORESOURCE_MEM,
 164         },
 165 };
 166
 167 static struct platform_device ts72xx_nand_flash = {
 168         .name                   = "gen_nand",
 169         .id                     = -1,
 170         .dev.platform_data      = &ts72xx_nand_data,
 171         .resource               = ts72xx_nand_resource,
 172         .num_resources          = ARRAY_SIZE(ts72xx_nand_resource),
 173 };
 174
 175
 176 /*************************************************************************
 177  * NOR flash (TS-7200 only)
 178  *************************************************************************/
 179 static struct physmap_flash_data ts72xx_nor_data = {
 180         .width          = 2,
 181 };
 182
 183 static struct resource ts72xx_nor_resource = {
 184         .start          = EP93XX_CS6_PHYS_BASE,
 185         .end            = EP93XX_CS6_PHYS_BASE + SZ_16M - 1,
 186         .flags          = IORESOURCE_MEM,
 187 };
 188
 189 static struct platform_device ts72xx_nor_flash = {
 190         .name                   = "physmap-flash",
 191         .id                     = 0,
 192         .dev.platform_data      = &ts72xx_nor_data,
 193         .resource               = &ts72xx_nor_resource,
 194         .num_resources          = 1,
 195 };
 196
 197 static void __init ts72xx_register_flash(void)
 198 {
 199         if (board_is_ts7200()) {
 200                 platform_device_register(&ts72xx_nor_flash);
 201         } else {
 202                 resource_size_t start;
 203
 204                 if (is_ts9420_installed())
 205                         start = EP93XX_CS7_PHYS_BASE;
 206                 else
 207                         start = EP93XX_CS6_PHYS_BASE;
 208
 209                 ts72xx_nand_resource[0].start = start;
 210                 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
 211
 212                 platform_device_register(&ts72xx_nand_flash);
 213         }
 214 }
 215
 216
 217 static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
 218 {
 219         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
 220         return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
 221 }
 222
 223 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
 224 {
 225         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
 226         __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
 227 }
 228
 229 static struct m48t86_ops ts72xx_rtc_ops = {
 230         .readbyte       = ts72xx_rtc_readbyte,
 231         .writebyte      = ts72xx_rtc_writebyte,
 232 };
 233
 234 static struct platform_device ts72xx_rtc_device = {
 235         .name           = "rtc-m48t86",
 236         .id             = -1,
 237         .dev            = {
 238                 .platform_data  = &ts72xx_rtc_ops,
 239         },
 240         .num_resources  = 0,
 241 };
 242
 243 static struct resource ts72xx_wdt_resources[] = {
 244         {
 245                 .start  = TS72XX_WDT_CONTROL_PHYS_BASE,
 246                 .end    = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
 247                 .flags  = IORESOURCE_MEM,
 248         },
 249         {
 250                 .start  = TS72XX_WDT_FEED_PHYS_BASE,
 251                 .end    = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
 252                 .flags  = IORESOURCE_MEM,
 253         },
 254 };
 255
 256 static struct platform_device ts72xx_wdt_device = {
 257         .name           = "ts72xx-wdt",
 258         .id             = -1,
 259         .num_resources  = ARRAY_SIZE(ts72xx_wdt_resources),
 260         .resource       = ts72xx_wdt_resources,
 261 };
 262
 263 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
 264         .phy_id         = 1,
 265 };
 266
 267 static void __init ts72xx_init_machine(void)
 268 {
 269         ep93xx_init_devices();
 270         ts72xx_register_flash();
 271         platform_device_register(&ts72xx_rtc_device);
 272         platform_device_register(&ts72xx_wdt_device);
 273
 274         ep93xx_register_eth(&ts72xx_eth_data, 1);
 275 }
 276
 277 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
 278         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 279         .phys_io        = EP93XX_APB_PHYS_BASE,
 280         .io_pg_offst    = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
 281         .boot_params    = EP93XX_SDCE3_PHYS_BASE_SYNC + 0x100,
 282         .map_io         = ts72xx_map_io,
 283         .init_irq       = ep93xx_init_irq,
 284         .timer          = &ep93xx_timer,
 285         .init_machine   = ts72xx_init_machine,
 286 MACHINE_END