drivers/mtd/nand/raw/nand_macronix.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2017 Free Electrons
   4  * Copyright (C) 2017 NextThing Co
   5  *
   6  * Author: Boris Brezillon <boris.brezillon@free-electrons.com>
   7  */
   8
   9 #include "internals.h"
  10
  11 /*
  12  * Macronix AC series does not support using SET/GET_FEATURES to change
  13  * the timings unlike what is declared in the parameter page. Unflag
  14  * this feature to avoid unnecessary downturns.
  15  */
  16 static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip)
  17 {
  18         unsigned int i;
  19         static const char * const broken_get_timings[] = {
  20                 "MX30LF1G18AC",
  21                 "MX30LF1G28AC",
  22                 "MX30LF2G18AC",
  23                 "MX30LF2G28AC",
  24                 "MX30LF4G18AC",
  25                 "MX30LF4G28AC",
  26                 "MX60LF8G18AC",
  27                 "MX30UF1G18AC",
  28                 "MX30UF1G16AC",
  29                 "MX30UF2G18AC",
  30                 "MX30UF2G16AC",
  31                 "MX30UF4G18AC",
  32                 "MX30UF4G16AC",
  33                 "MX30UF4G28AC",
  34         };
  35
  36         if (!chip->parameters.supports_set_get_features)
  37                 return;
  38
  39         for (i = 0; i < ARRAY_SIZE(broken_get_timings); i++) {
  40                 if (!strcmp(broken_get_timings[i], chip->parameters.model))
  41                         break;
  42         }
  43
  44         if (i == ARRAY_SIZE(broken_get_timings))
  45                 return;
  46
  47         bitmap_clear(chip->parameters.get_feature_list,
  48                      ONFI_FEATURE_ADDR_TIMING_MODE, 1);
  49         bitmap_clear(chip->parameters.set_feature_list,
  50                      ONFI_FEATURE_ADDR_TIMING_MODE, 1);
  51 }
  52
  53 static int macronix_nand_init(struct nand_chip *chip)
  54 {
  55         if (nand_is_slc(chip))
  56                 chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
  57
  58         macronix_nand_fix_broken_get_timings(chip);
  59
  60         return 0;
  61 }
  62
  63 const struct nand_manufacturer_ops macronix_nand_manuf_ops = {
  64         .init = macronix_nand_init,
  65 };