driver_chipcommon_nflash.c

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/*
 * Broadcom specific AMBA
 * ChipCommon NAND flash interface
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */

#include <linux/platform_device.h>
#include <linux/bcma/bcma.h>

#include "bcma_private.h"

struct platform_device bcma_nflash_dev = {
    .name       = "bcma_nflash",
    .num_resources  = 0,
};

/* Initialize NAND flash access */
int bcma_nflash_init(struct bcma_drv_cc *cc)
{
    struct bcma_bus *bus = cc->core->bus;

    if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4706 &&
        cc->core->id.rev != 0x38) {
        bcma_err(bus, "NAND flash on unsupported board!\n");
        return -ENOTSUPP;
    }

    if (!(cc->capabilities & BCMA_CC_CAP_NFLASH)) {
        bcma_err(bus, "NAND flash not present according to ChipCommon\n");
        return -ENODEV;
    }

    cc->nflash.present = true;

    /* Prepare platform device, but don't register it yet. It's too early,
     * malloc (required by device_private_init) is not available yet. */
    bcma_nflash_dev.dev.platform_data = &cc->nflash;

    return 0;
}