Root/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 "bcma_private.h"
9
10#include <linux/platform_device.h>
11#include <linux/bcma/bcma.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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