target/linux/lantiq/patches-3.14/0160-owrt-lantiq-multiple-flash.patch

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