LXR linux/drivers/mtd/nand/bcm47xxnflash/main.c

   1/*
   2 * BCM47XX NAND flash driver
   3 *
   4 * Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 *
  10 */
  11
  12#include "bcm47xxnflash.h"
  13
  14#include <linux/module.h>
  15#include <linux/kernel.h>
  16#include <linux/slab.h>
  17#include <linux/platform_device.h>
  18#include <linux/bcma/bcma.h>
  19
  20MODULE_DESCRIPTION("NAND flash driver for BCMA bus");
  21MODULE_LICENSE("GPL");
  22MODULE_AUTHOR("Rafał Miłecki");
  23
  24static const char *probes[] = { "bcm47xxpart", NULL };
  25
  26static int bcm47xxnflash_probe(struct platform_device *pdev)
  27{
  28        struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev);
  29        struct bcm47xxnflash *b47n;
  30        int err = 0;
  31
  32        b47n = kzalloc(sizeof(*b47n), GFP_KERNEL);
  33        if (!b47n) {
  34                err = -ENOMEM;
  35                goto out;
  36        }
  37
  38        b47n->nand_chip.priv = b47n;
  39        b47n->mtd.owner = THIS_MODULE;
  40        b47n->mtd.priv = &b47n->nand_chip; /* Required */
  41        b47n->cc = container_of(nflash, struct bcma_drv_cc, nflash);
  42
  43        if (b47n->cc->core->bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) {
  44                err = bcm47xxnflash_ops_bcm4706_init(b47n);
  45        } else {
  46                pr_err("Device not supported\n");
  47                err = -ENOTSUPP;
  48        }
  49        if (err) {
  50                pr_err("Initialization failed: %d\n", err);
  51                goto err_init;
  52        }
  53
  54        err = mtd_device_parse_register(&b47n->mtd, probes, NULL, NULL, 0);
  55        if (err) {
  56                pr_err("Failed to register MTD device: %d\n", err);
  57                goto err_dev_reg;
  58        }
  59
  60        return 0;
  61
  62err_dev_reg:
  63err_init:
  64        kfree(b47n);
  65out:
  66        return err;
  67}
  68
  69static int bcm47xxnflash_remove(struct platform_device *pdev)
  70{
  71        struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev);
  72
  73        if (nflash->mtd)
  74                mtd_device_unregister(nflash->mtd);
  75
  76        return 0;
  77}
  78
  79static struct platform_driver bcm47xxnflash_driver = {
  80        .probe  = bcm47xxnflash_probe,
  81        .remove = bcm47xxnflash_remove,
  82        .driver = {
  83                .name = "bcma_nflash",
  84                .owner = THIS_MODULE,
  85        },
  86};
  87
  88static int __init bcm47xxnflash_init(void)
  89{
  90        int err;
  91
  92        err = platform_driver_register(&bcm47xxnflash_driver);
  93        if (err)
  94                pr_err("Failed to register bcm47xx nand flash driver: %d\n",
  95                       err);
  96
  97        return err;
  98}
  99
 100static void __exit bcm47xxnflash_exit(void)
 101{
 102        platform_driver_unregister(&bcm47xxnflash_driver);
 103}
 104
 105module_init(bcm47xxnflash_init);
 106module_exit(bcm47xxnflash_exit);
 107