drivers/bcma/driver_chipcommon_nflash.c

   1 /*
   2  * Broadcom specific AMBA
   3  * ChipCommon NAND flash interface
   4  *
   5  * Licensed under the GNU/GPL. See COPYING for details.
   6  */
   7
   8 #include <linux/platform_device.h>
   9 #include <linux/bcma/bcma.h>
  10
  11 #include "bcma_private.h"
  12
  13 struct platform_device bcma_nflash_dev = {
  14         .name           = "bcma_nflash",
  15         .num_resources  = 0,
  16 };
  17
  18 /* Initialize NAND flash access */
  19 int bcma_nflash_init(struct bcma_drv_cc *cc)
  20 {
  21         struct bcma_bus *bus = cc->core->bus;
  22
  23         if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4706 &&
  24             cc->core->id.rev != 38) {
  25                 bcma_err(bus, "NAND flash on unsupported board!\n");
  26                 return -ENOTSUPP;
  27         }
  28
  29         if (!(cc->capabilities & BCMA_CC_CAP_NFLASH)) {
  30                 bcma_err(bus, "NAND flash not present according to ChipCommon\n");
  31                 return -ENODEV;
  32         }
  33
  34         cc->nflash.present = true;
  35         if (cc->core->id.rev == 38 &&
  36             (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT))
  37                 cc->nflash.boot = true;
  38
  39         /* Prepare platform device, but don't register it yet. It's too early,
  40          * malloc (required by device_private_init) is not available yet. */
  41         bcma_nflash_dev.dev.platform_data = &cc->nflash;
  42
  43         return 0;
  44 }