drivers/dfu/dfu_nand.c

   1 /*
   2  * dfu_nand.c -- DFU for NAND routines.
   3  *
   4  * Copyright (C) 2012-2013 Texas Instruments, Inc.
   5  *
   6  * Based on dfu_mmc.c which is:
   7  * Copyright (C) 2012 Samsung Electronics
   8  * author: Lukasz Majewski <l.majewski@samsung.com>
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12
  13 #include <common.h>
  14 #include <malloc.h>
  15 #include <errno.h>
  16 #include <div64.h>
  17 #include <dfu.h>
  18 #include <linux/mtd/mtd.h>
  19 #include <jffs2/load_kernel.h>
  20 #include <nand.h>
  21
  22 static int nand_block_op(enum dfu_op op, struct dfu_entity *dfu,
  23                         u64 offset, void *buf, long *len)
  24 {
  25         loff_t start, lim;
  26         size_t count, actual;
  27         int ret;
  28         nand_info_t *nand;
  29
  30         /* if buf == NULL return total size of the area */
  31         if (buf == NULL) {
  32                 *len = dfu->data.nand.size;
  33                 return 0;
  34         }
  35
  36         start = dfu->data.nand.start + offset + dfu->bad_skip;
  37         lim = dfu->data.nand.start + dfu->data.nand.size - start;
  38         count = *len;
  39
  40         if (nand_curr_device < 0 ||
  41             nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
  42             !nand_info[nand_curr_device].name) {
  43                 printf("%s: invalid nand device\n", __func__);
  44                 return -1;
  45         }
  46
  47         nand = &nand_info[nand_curr_device];
  48
  49         if (op == DFU_OP_READ) {
  50                 ret = nand_read_skip_bad(nand, start, &count, &actual,
  51                                 lim, buf);
  52         } else {
  53                 nand_erase_options_t opts;
  54
  55                 memset(&opts, 0, sizeof(opts));
  56                 opts.offset = start;
  57                 opts.length = count;
  58                 opts.spread = 1;
  59                 opts.quiet = 1;
  60                 opts.lim = lim;
  61                 /* first erase */
  62                 ret = nand_erase_opts(nand, &opts);
  63                 if (ret)
  64                         return ret;
  65                 /* then write */
  66                 ret = nand_write_skip_bad(nand, start, &count, &actual,
  67                                 lim, buf, 0);
  68         }
  69
  70         if (ret != 0) {
  71                 printf("%s: nand_%s_skip_bad call failed at %llx!\n",
  72                        __func__, op == DFU_OP_READ ? "read" : "write",
  73                        start);
  74                 return ret;
  75         }
  76
  77         /*
  78          * Find out where we stopped writing data.  This can be deeper into
  79          * the NAND than we expected due to having to skip bad blocks.  So
  80          * we must take this into account for the next write, if any.
  81          */
  82         if (actual > count)
  83                 dfu->bad_skip += actual - count;
  84
  85         return ret;
  86 }
  87
  88 static inline int nand_block_write(struct dfu_entity *dfu,
  89                 u64 offset, void *buf, long *len)
  90 {
  91         return nand_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
  92 }
  93
  94 static inline int nand_block_read(struct dfu_entity *dfu,
  95                 u64 offset, void *buf, long *len)
  96 {
  97         return nand_block_op(DFU_OP_READ, dfu, offset, buf, len);
  98 }
  99
 100 static int dfu_write_medium_nand(struct dfu_entity *dfu,
 101                 u64 offset, void *buf, long *len)
 102 {
 103         int ret = -1;
 104
 105         switch (dfu->layout) {
 106         case DFU_RAW_ADDR:
 107                 ret = nand_block_write(dfu, offset, buf, len);
 108                 break;
 109         default:
 110                 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
 111                        dfu_get_layout(dfu->layout));
 112         }
 113
 114         return ret;
 115 }
 116
 117 static int dfu_read_medium_nand(struct dfu_entity *dfu, u64 offset, void *buf,
 118                 long *len)
 119 {
 120         int ret = -1;
 121
 122         switch (dfu->layout) {
 123         case DFU_RAW_ADDR:
 124                 ret = nand_block_read(dfu, offset, buf, len);
 125                 break;
 126         default:
 127                 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
 128                        dfu_get_layout(dfu->layout));
 129         }
 130
 131         return ret;
 132 }
 133
 134 static int dfu_flush_medium_nand(struct dfu_entity *dfu)
 135 {
 136         int ret = 0;
 137
 138         /* in case of ubi partition, erase rest of the partition */
 139         if (dfu->data.nand.ubi) {
 140                 nand_info_t *nand;
 141                 nand_erase_options_t opts;
 142
 143                 if (nand_curr_device < 0 ||
 144                     nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
 145                     !nand_info[nand_curr_device].name) {
 146                         printf("%s: invalid nand device\n", __func__);
 147                         return -1;
 148                 }
 149
 150                 nand = &nand_info[nand_curr_device];
 151
 152                 memset(&opts, 0, sizeof(opts));
 153                 opts.offset = dfu->data.nand.start + dfu->offset +
 154                                 dfu->bad_skip;
 155                 opts.length = dfu->data.nand.start +
 156                                 dfu->data.nand.size - opts.offset;
 157                 ret = nand_erase_opts(nand, &opts);
 158                 if (ret != 0)
 159                         printf("Failure erase: %d\n", ret);
 160         }
 161
 162         return ret;
 163 }
 164
 165 int dfu_fill_entity_nand(struct dfu_entity *dfu, char *s)
 166 {
 167         char *st;
 168         int ret, dev, part;
 169
 170         dfu->data.nand.ubi = 0;
 171         dfu->dev_type = DFU_DEV_NAND;
 172         st = strsep(&s, " ");
 173         if (!strcmp(st, "raw")) {
 174                 dfu->layout = DFU_RAW_ADDR;
 175                 dfu->data.nand.start = simple_strtoul(s, &s, 16);
 176                 s++;
 177                 dfu->data.nand.size = simple_strtoul(s, &s, 16);
 178         } else if ((!strcmp(st, "part")) || (!strcmp(st, "partubi"))) {
 179                 char mtd_id[32];
 180                 struct mtd_device *mtd_dev;
 181                 u8 part_num;
 182                 struct part_info *pi;
 183
 184                 dfu->layout = DFU_RAW_ADDR;
 185
 186                 dev = simple_strtoul(s, &s, 10);
 187                 s++;
 188                 part = simple_strtoul(s, &s, 10);
 189
 190                 sprintf(mtd_id, "%s%d,%d", "nand", dev, part - 1);
 191                 printf("using id '%s'\n", mtd_id);
 192
 193                 mtdparts_init();
 194
 195                 ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num, &pi);
 196                 if (ret != 0) {
 197                         printf("Could not locate '%s'\n", mtd_id);
 198                         return -1;
 199                 }
 200
 201                 dfu->data.nand.start = pi->offset;
 202                 dfu->data.nand.size = pi->size;
 203                 if (!strcmp(st, "partubi"))
 204                         dfu->data.nand.ubi = 1;
 205         } else {
 206                 printf("%s: Memory layout (%s) not supported!\n", __func__, st);
 207                 return -1;
 208         }
 209
 210         dfu->read_medium = dfu_read_medium_nand;
 211         dfu->write_medium = dfu_write_medium_nand;
 212         dfu->flush_medium = dfu_flush_medium_nand;
 213
 214         /* initial state */
 215         dfu->inited = 0;
 216
 217         return 0;
 218 }