target/linux/lantiq/patches-4.4/0160-owrt-lantiq-multiple-flash.patch

   1 --- a/drivers/mtd/maps/lantiq-flash.c
   2 +++ b/drivers/mtd/maps/lantiq-flash.c
   3 @@ -19,6 +19,7 @@
   4  #include <linux/mtd/cfi.h>
   5  #include <linux/platform_device.h>
   6  #include <linux/mtd/physmap.h>
   7 +#include <linux/mtd/concat.h>
   8  #include <linux/of.h>
   9
  10  #include <lantiq_soc.h>
  11 @@ -38,13 +39,16 @@ enum {
  12         LTQ_NOR_NORMAL
  13  };
  14
  15 +#define MAX_RESOURCES          4
  16 +
  17  struct ltq_mtd {
  18 -       struct resource *res;
  19 -       struct mtd_info *mtd;
  20 -       struct map_info *map;
  21 +       struct mtd_info *mtd[MAX_RESOURCES];
  22 +       struct mtd_info *cmtd;
  23 +       struct map_info map[MAX_RESOURCES];
  24  };
  25
  26  static const char ltq_map_name[] = "ltq_nor";
  27 +static const char * const ltq_probe_types[] = { "cmdlinepart", "ofpart", NULL };
  28
  29  static map_word
  30  ltq_read16(struct map_info *map, unsigned long adr)
  31 @@ -108,12 +112,44 @@ ltq_copy_to(struct map_info *map, unsign
  32  }
  33
  34  static int
  35 +ltq_mtd_remove(struct platform_device *pdev)
  36 +{
  37 +       struct ltq_mtd *ltq_mtd = platform_get_drvdata(pdev);
  38 +       int i;
  39 +
  40 +       if (ltq_mtd == NULL)
  41 +               return 0;
  42 +
  43 +       if (ltq_mtd->cmtd) {
  44 +               mtd_device_unregister(ltq_mtd->cmtd);
  45 +               if (ltq_mtd->cmtd != ltq_mtd->mtd[0])
  46 +                       mtd_concat_destroy(ltq_mtd->cmtd);
  47 +       }
  48 +
  49 +       for (i = 0; i < MAX_RESOURCES; i++) {
  50 +               if (ltq_mtd->mtd[i] != NULL)
  51 +                       map_destroy(ltq_mtd->mtd[i]);
  52 +       }
  53 +
  54 +       kfree(ltq_mtd);
  55 +
  56 +       return 0;
  57 +}
  58 +
  59 +static int
  60  ltq_mtd_probe(struct platform_device *pdev)
  61  {
  62         struct mtd_part_parser_data ppdata;
  63         struct ltq_mtd *ltq_mtd;
  64         struct cfi_private *cfi;
  65 -       int err;
  66 +       int err = 0;
  67 +       int i;
  68 +       int devices_found = 0;
  69 +
  70 +       static const char *rom_probe_types[] = {
  71 +               "cfi_probe", "jedec_probe", NULL
  72 +       };
  73 +       const char **type;
  74
  75         if (of_machine_is_compatible("lantiq,falcon") &&
  76                         (ltq_boot_select() != BS_FLASH)) {
  77 @@ -127,75 +163,90 @@ ltq_mtd_probe(struct platform_device *pd
  78
  79         platform_set_drvdata(pdev, ltq_mtd);
  80
  81 -       ltq_mtd->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  82 -       if (!ltq_mtd->res) {
  83 -               dev_err(&pdev->dev, "failed to get memory resource\n");
  84 -               return -ENOENT;
  85 -       }
  86 +       for (i = 0; i < pdev->num_resources; i++) {
  87 +               printk(KERN_NOTICE "lantiq nor flash device: %.8llx at %.8llx\n",
  88 +                      (unsigned long long)resource_size(&pdev->resource[i]),
  89 +                      (unsigned long long)pdev->resource[i].start);
  90 +
  91 +               if (!devm_request_mem_region(&pdev->dev,
  92 +                       pdev->resource[i].start,
  93 +                       resource_size(&pdev->resource[i]),
  94 +                       dev_name(&pdev->dev))) {
  95 +                       dev_err(&pdev->dev, "Could not reserve memory region\n");
  96 +                       return -ENOMEM;
  97 +               }
  98
  99 -       ltq_mtd->map = devm_kzalloc(&pdev->dev, sizeof(struct map_info),
 100 -                                   GFP_KERNEL);
 101 -       if (!ltq_mtd->map)
 102 -               return -ENOMEM;
 103 +               ltq_mtd->map[i].name = ltq_map_name;
 104 +               ltq_mtd->map[i].bankwidth = 2;
 105 +               ltq_mtd->map[i].read = ltq_read16;
 106 +               ltq_mtd->map[i].write = ltq_write16;
 107 +               ltq_mtd->map[i].copy_from = ltq_copy_from;
 108 +               ltq_mtd->map[i].copy_to = ltq_copy_to;
 109
 110 -       if (of_find_property(pdev->dev.of_node, "lantiq,noxip", NULL))
 111 -               ltq_mtd->map->phys = NO_XIP;
 112 -       else
 113 -               ltq_mtd->map->phys = ltq_mtd->res->start;
 114 -       ltq_mtd->res->start;
 115 -       ltq_mtd->map->size = resource_size(ltq_mtd->res);
 116 -       ltq_mtd->map->virt = devm_ioremap_resource(&pdev->dev, ltq_mtd->res);
 117 -       if (IS_ERR(ltq_mtd->map->virt))
 118 -               return PTR_ERR(ltq_mtd->map->virt);
 119 +               if (of_find_property(pdev->dev.of_node, "lantiq,noxip", NULL))
 120 +                       ltq_mtd->map[i].phys = NO_XIP;
 121 +               else
 122 +                       ltq_mtd->map[i].phys = pdev->resource[i].start;
 123 +               ltq_mtd->map[i].size = resource_size(&pdev->resource[i]);
 124 +               ltq_mtd->map[i].virt = devm_ioremap(&pdev->dev, pdev->resource[i].start,
 125 +                                                ltq_mtd->map[i].size);
 126 +               if (IS_ERR(ltq_mtd->map[i].virt))
 127 +                       return PTR_ERR(ltq_mtd->map[i].virt);
 128
 129 -       ltq_mtd->map->name = ltq_map_name;
 130 -       ltq_mtd->map->bankwidth = 2;
 131 -       ltq_mtd->map->read = ltq_read16;
 132 -       ltq_mtd->map->write = ltq_write16;
 133 -       ltq_mtd->map->copy_from = ltq_copy_from;
 134 -       ltq_mtd->map->copy_to = ltq_copy_to;
 135 +               if (ltq_mtd->map[i].virt == NULL) {
 136 +                       dev_err(&pdev->dev, "Failed to ioremap flash region\n");
 137 +                       err = PTR_ERR(ltq_mtd->map[i].virt);
 138 +                       goto err_out;
 139 +               }
 140
 141 -       ltq_mtd->map->map_priv_1 = LTQ_NOR_PROBING;
 142 -       ltq_mtd->mtd = do_map_probe("cfi_probe", ltq_mtd->map);
 143 -       ltq_mtd->map->map_priv_1 = LTQ_NOR_NORMAL;
 144 +               ltq_mtd->map[i].map_priv_1 = LTQ_NOR_PROBING;
 145 +               for (type = rom_probe_types; !ltq_mtd->mtd[i] && *type; type++)
 146 +                       ltq_mtd->mtd[i] = do_map_probe(*type, &ltq_mtd->map[i]);
 147 +               ltq_mtd->map[i].map_priv_1 = LTQ_NOR_NORMAL;
 148
 149 -       if (!ltq_mtd->mtd) {
 150 -               dev_err(&pdev->dev, "probing failed\n");
 151 -               return -ENXIO;
 152 +               if (!ltq_mtd->mtd[i]) {
 153 +                       dev_err(&pdev->dev, "probing failed\n");
 154 +                       return -ENXIO;
 155 +               } else {
 156 +                       devices_found++;
 157 +               }
 158 +
 159 +               ltq_mtd->mtd[i]->owner = THIS_MODULE;
 160 +               ltq_mtd->mtd[i]->dev.parent = &pdev->dev;
 161 +
 162 +               cfi = ltq_mtd->map[i].fldrv_priv;
 163 +               cfi->addr_unlock1 ^= 1;
 164 +               cfi->addr_unlock2 ^= 1;
 165         }
 166
 167 -       ltq_mtd->mtd->dev.parent = &pdev->dev;
 168 +       if (devices_found == 1) {
 169 +               ltq_mtd->cmtd = ltq_mtd->mtd[0];
 170 +       } else if (devices_found > 1) {
 171 +               /*
 172 +                * We detected multiple devices. Concatenate them together.
 173 +                */
 174 +               ltq_mtd->cmtd = mtd_concat_create(ltq_mtd->mtd, devices_found, dev_name(&pdev->dev));
 175 +               if (ltq_mtd->cmtd == NULL)
 176 +                       err = -ENXIO;
 177 +       }
 178
 179 -       cfi = ltq_mtd->map->fldrv_priv;
 180 -       cfi->addr_unlock1 ^= 1;
 181 -       cfi->addr_unlock2 ^= 1;
 182 +       ltq_mtd->cmtd->dev.parent = &pdev->dev;
 183
 184         ppdata.of_node = pdev->dev.of_node;
 185 -       err = mtd_device_parse_register(ltq_mtd->mtd, NULL, &ppdata, NULL, 0);
 186 +       err = mtd_device_parse_register(ltq_mtd->cmtd, ltq_probe_types,
 187 +                                       &ppdata, NULL, 0);
 188         if (err) {
 189                 dev_err(&pdev->dev, "failed to add partitions\n");
 190 -               goto err_destroy;
 191 +               goto err_out;
 192         }
 193
 194         return 0;
 195
 196 -err_destroy:
 197 -       map_destroy(ltq_mtd->mtd);
 198 +err_out:
 199 +       ltq_mtd_remove(pdev);
 200         return err;
 201  }
 202
 203 -static int
 204 -ltq_mtd_remove(struct platform_device *pdev)
 205 -{
 206 -       struct ltq_mtd *ltq_mtd = platform_get_drvdata(pdev);
 207 -
 208 -       if (ltq_mtd && ltq_mtd->mtd) {
 209 -               mtd_device_unregister(ltq_mtd->mtd);
 210 -               map_destroy(ltq_mtd->mtd);
 211 -       }
 212 -       return 0;
 213 -}
 214 -
 215  static const struct of_device_id ltq_mtd_match[] = {
 216         { .compatible = "lantiq,nor" },
 217         {},