drivers/mtd/nand/nand.c

   1 /*
   2  * (C) Copyright 2005
   3  * 2N Telekomunikace, a.s. <www.2n.cz>
   4  * Ladislav Michl <michl@2n.cz>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0
   7  */
   8
   9 #include <common.h>
  10 #include <nand.h>
  11 #include <errno.h>
  12
  13 #ifndef CONFIG_SYS_NAND_BASE_LIST
  14 #define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE }
  15 #endif
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 int nand_curr_device = -1;
  20
  21
  22 struct mtd_info nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
  23
  24 #ifndef CONFIG_SYS_NAND_SELF_INIT
  25 static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
  26 static ulong base_address[CONFIG_SYS_MAX_NAND_DEVICE] = CONFIG_SYS_NAND_BASE_LIST;
  27 #endif
  28
  29 static char dev_name[CONFIG_SYS_MAX_NAND_DEVICE][8];
  30
  31 static unsigned long total_nand_size; /* in kiB */
  32
  33 /* Register an initialized NAND mtd device with the U-Boot NAND command. */
  34 int nand_register(int devnum)
  35 {
  36         struct mtd_info *mtd;
  37
  38         if (devnum >= CONFIG_SYS_MAX_NAND_DEVICE)
  39                 return -EINVAL;
  40
  41         mtd = &nand_info[devnum];
  42
  43         sprintf(dev_name[devnum], "nand%d", devnum);
  44         mtd->name = dev_name[devnum];
  45
  46 #ifdef CONFIG_MTD_DEVICE
  47         /*
  48          * Add MTD device so that we can reference it later
  49          * via the mtdcore infrastructure (e.g. ubi).
  50          */
  51         add_mtd_device(mtd);
  52 #endif
  53
  54         total_nand_size += mtd->size / 1024;
  55
  56         if (nand_curr_device == -1)
  57                 nand_curr_device = devnum;
  58
  59         return 0;
  60 }
  61
  62 #ifndef CONFIG_SYS_NAND_SELF_INIT
  63 static void nand_init_chip(int i)
  64 {
  65         struct mtd_info *mtd = &nand_info[i];
  66         struct nand_chip *nand = &nand_chip[i];
  67         ulong base_addr = base_address[i];
  68         int maxchips = CONFIG_SYS_NAND_MAX_CHIPS;
  69
  70         if (maxchips < 1)
  71                 maxchips = 1;
  72
  73         mtd->priv = nand;
  74         nand->IO_ADDR_R = nand->IO_ADDR_W = (void  __iomem *)base_addr;
  75
  76         if (board_nand_init(nand))
  77                 return;
  78
  79         if (nand_scan(mtd, maxchips))
  80                 return;
  81
  82         nand_register(i);
  83 }
  84 #endif
  85
  86 void nand_init(void)
  87 {
  88 #ifdef CONFIG_SYS_NAND_SELF_INIT
  89         board_nand_init();
  90 #else
  91         int i;
  92
  93         for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
  94                 nand_init_chip(i);
  95 #endif
  96
  97         printf("%lu MiB\n", total_nand_size / 1024);
  98
  99 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
 100         /*
 101          * Select the chip in the board/cpu specific driver
 102          */
 103         board_nand_select_device(nand_info[nand_curr_device].priv, nand_curr_device);
 104 #endif
 105 }