board/karo/common/nand.c

   1 /*
   2  * (C) Copyright 2014 Lothar Waßmann <LW@KARO-electronics.de>
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16 */
  17
  18 #include <common.h>
  19 #include <errno.h>
  20 #include <libfdt.h>
  21 #include <fdt_support.h>
  22 #include <nand.h>
  23 #include <mxcfb.h>
  24 #include <linux/list.h>
  25 #include <linux/fb.h>
  26 #include <jffs2/load_kernel.h>
  27 #include <malloc.h>
  28
  29 #include "karo.h"
  30
  31 #ifdef CONFIG_MAX_DTB_SIZE
  32 #define MAX_DTB_SIZE    CONFIG_MAX_DTB_SIZE
  33 #else
  34 #define MAX_DTB_SIZE    SZ_64K
  35 #endif
  36
  37 DECLARE_GLOBAL_DATA_PTR;
  38
  39 int karo_load_nand_part(const char *part, void *addr, size_t len)
  40 {
  41         int ret;
  42         struct mtd_device *dev;
  43         struct part_info *part_info;
  44         u8 part_num;
  45
  46         debug("Initializing mtd_parts\n");
  47         ret = mtdparts_init();
  48         if (ret)
  49                 return ret;
  50
  51         debug("Trying to find NAND partition '%s'\n", part);
  52         ret = find_dev_and_part(part, &dev, &part_num, &part_info);
  53         if (ret) {
  54                 printf("Failed to find flash partition '%s': %d\n",
  55                         part, ret);
  56
  57                 return ret;
  58         }
  59         debug("Found partition '%s': offset=%08llx size=%08llx\n",
  60                 part, (u64)part_info->offset, (u64)part_info->size);
  61
  62         if (part_info->size < len)
  63                 len = part_info->size;
  64
  65         debug("Reading NAND partition '%s' to %p\n", part, addr);
  66         ret = nand_read_skip_bad(&nand_info[0], part_info->offset, &len,
  67                                 NULL, part_info->size, addr);
  68         if (ret) {
  69                 printf("Failed to load partition '%s' to %p\n", part, addr);
  70                 return ret;
  71         }
  72
  73         debug("Read %u byte from partition '%s' @ offset %08llx\n",
  74                 len, part, (u64)part_info->offset);
  75         return 0;
  76 }
  77
  78 #if defined(CONFIG_SPLASH_SCREEN) && defined(CONFIG_MTDPARTS)
  79 static int erase_flash(loff_t offs, size_t len)
  80 {
  81         nand_erase_options_t nand_erase_options;
  82
  83         memset(&nand_erase_options, 0, sizeof(nand_erase_options));
  84         nand_erase_options.length = len;
  85         nand_erase_options.offset = offs;
  86
  87         return nand_erase_opts(&nand_info[0], &nand_erase_options);
  88 }
  89
  90 int do_fbdump(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  91 {
  92         int ret;
  93         size_t fbsize = calc_fbsize();
  94         const char *part = "logo";
  95         struct mtd_device *dev;
  96         struct part_info *part_info;
  97         u8 part_num;
  98         u_char *addr = (u_char *)gd->fb_base;
  99
 100         if (argc > 2)
 101                 return CMD_RET_USAGE;
 102
 103         if (argc == 2)
 104                 part = argv[1];
 105
 106         if (!addr) {
 107                 printf("fb address unknown\n");
 108                 return CMD_RET_FAILURE;
 109         }
 110
 111         debug("Initializing mtd_parts\n");
 112         ret = mtdparts_init();
 113         if (ret)
 114                 return CMD_RET_FAILURE;
 115
 116         debug("Trying to find NAND partition '%s'\n", part);
 117         ret = find_dev_and_part(part, &dev, &part_num,
 118                                 &part_info);
 119         if (ret) {
 120                 printf("Failed to find flash partition '%s': %d\n",
 121                         part, ret);
 122                 return CMD_RET_FAILURE;
 123         }
 124         debug("Found partition '%s': offset=%08x size=%08x\n",
 125                 part, part_info->offset, part_info->size);
 126         if (part_info->size < fbsize) {
 127                 printf("Error: partition '%s' smaller than frame buffer size: %u\n",
 128                         part, fbsize);
 129                 return CMD_RET_FAILURE;
 130         }
 131         debug("Writing framebuffer %p to NAND partition '%s'\n",
 132                 addr, part);
 133
 134         ret = erase_flash(part_info->offset, fbsize);
 135         if (ret) {
 136                 printf("Failed to erase partition '%s'\n", part);
 137                 return CMD_RET_FAILURE;
 138         }
 139
 140         ret = nand_write_skip_bad(&nand_info[0], part_info->offset,
 141                                 &fbsize, NULL, part_info->size,
 142                                 addr, WITH_DROP_FFS);
 143         if (ret) {
 144                 printf("Failed to write partition '%s'\n", part);
 145                 return CMD_RET_FAILURE;
 146         }
 147
 148         debug("Wrote %u byte from %p to partition '%s' @ offset %08x\n",
 149                 fbsize, addr, part, part_info->offset);
 150
 151         return CMD_RET_SUCCESS;
 152 }
 153
 154 U_BOOT_CMD(fbdump, 2, 0, do_fbdump, "dump framebuffer contents to flash",
 155         "[partition name]\n"
 156         "       default partition name: 'logo'\n");
 157 #endif