arch/powerpc/platforms/44x/warp-nand.c

   1 /*
   2  * PIKA Warp(tm) NAND flash specific routines
   3  *
   4  * Copyright (c) 2008 PIKA Technologies
   5  *   Sean MacLennan <smaclennan@pikatech.com>
   6  */
   7
   8 #include <linux/platform_device.h>
   9 #include <linux/mtd/mtd.h>
  10 #include <linux/mtd/map.h>
  11 #include <linux/mtd/partitions.h>
  12 #include <linux/mtd/nand.h>
  13 #include <linux/mtd/ndfc.h>
  14
  15 #ifdef CONFIG_MTD_NAND_NDFC
  16
  17 #define CS_NAND_0       1       /* use chip select 1 for NAND device 0 */
  18
  19 #define WARP_NAND_FLASH_REG_ADDR        0xD0000000UL
  20 #define WARP_NAND_FLASH_REG_SIZE        0x2000
  21
  22 static struct resource warp_ndfc = {
  23         .start = WARP_NAND_FLASH_REG_ADDR,
  24         .end   = WARP_NAND_FLASH_REG_ADDR + WARP_NAND_FLASH_REG_SIZE,
  25         .flags = IORESOURCE_MEM,
  26 };
  27
  28 static struct mtd_partition nand_parts[] = {
  29         {
  30                 .name   = "kernel",
  31                 .offset = 0,
  32                 .size   = 0x0200000
  33         },
  34         {
  35                 .name   = "root",
  36                 .offset = 0x0200000,
  37                 .size   = 0x3400000
  38         },
  39         {
  40                 .name   = "user",
  41                 .offset = 0x3600000,
  42                 .size   = 0x0A00000
  43         },
  44 };
  45
  46 struct ndfc_controller_settings warp_ndfc_settings = {
  47         .ccr_settings = (NDFC_CCR_BS(CS_NAND_0) | NDFC_CCR_ARAC1),
  48         .ndfc_erpn = 0,
  49 };
  50
  51 static struct ndfc_chip_settings warp_chip0_settings = {
  52         .bank_settings = 0x80002222,
  53 };
  54
  55 struct platform_nand_ctrl warp_nand_ctrl = {
  56         .priv = &warp_ndfc_settings,
  57 };
  58
  59 static struct platform_device warp_ndfc_device = {
  60         .name = "ndfc-nand",
  61         .id = 0,
  62         .dev = {
  63                 .platform_data = &warp_nand_ctrl,
  64         },
  65         .num_resources = 1,
  66         .resource = &warp_ndfc,
  67 };
  68
  69 static struct nand_ecclayout nand_oob_16 = {
  70         .eccbytes = 3,
  71         .eccpos = { 0, 1, 2, 3, 6, 7 },
  72         .oobfree = { {.offset = 8, .length = 16} }
  73 };
  74
  75 static struct platform_nand_chip warp_nand_chip0 = {
  76         .nr_chips = 1,
  77         .chip_offset = CS_NAND_0,
  78         .nr_partitions = ARRAY_SIZE(nand_parts),
  79         .partitions = nand_parts,
  80         .chip_delay = 50,
  81         .ecclayout = &nand_oob_16,
  82         .priv = &warp_chip0_settings,
  83 };
  84
  85 static struct platform_device warp_nand_device = {
  86         .name = "ndfc-chip",
  87         .id = 0,
  88         .num_resources = 1,
  89         .resource = &warp_ndfc,
  90         .dev = {
  91                 .platform_data = &warp_nand_chip0,
  92                 .parent = &warp_ndfc_device.dev,
  93         }
  94 };
  95
  96 static int warp_setup_nand_flash(void)
  97 {
  98         platform_device_register(&warp_ndfc_device);
  99         platform_device_register(&warp_nand_device);
 100
 101         return 0;
 102 }
 103 device_initcall(warp_setup_nand_flash);
 104
 105 #endif