linux/drivers/bcma/driver_chipcommon_nflash.c
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   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
  13struct platform_device bcma_nflash_dev = {
  14        .name           = "bcma_nflash",
  15        .num_resources  = 0,
  16};
  17
  18/* Initialize NAND flash access */
  19int 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}
  45
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