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
  20 MODULE_DESCRIPTION("NAND flash driver for BCMA bus");
  21 MODULE_LICENSE("GPL");
  22 MODULE_AUTHOR("Rafał Miłecki");
  23
  24 static const char *probes[] = { "bcm47xxpart", NULL };
  25
  26 static int bcm47xxnflash_probe(struct platform_device *pdev)
  27 {
  28         struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev);
  29         struct bcm47xxnflash *b47n;
  30         struct mtd_info *mtd;
  31         int err = 0;
  32
  33         b47n = devm_kzalloc(&pdev->dev, sizeof(*b47n), GFP_KERNEL);
  34         if (!b47n)
  35                 return -ENOMEM;
  36
  37         b47n->nand_chip.priv = b47n;
  38         mtd = nand_to_mtd(&b47n->nand_chip);
  39         mtd->dev.parent = &pdev->dev;
  40         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                 return err;
  52         }
  53
  54         platform_set_drvdata(pdev, b47n);
  55
  56         err = mtd_device_parse_register(mtd, probes, NULL, NULL, 0);
  57         if (err) {
  58                 pr_err("Failed to register MTD device: %d\n", err);
  59                 return err;
  60         }
  61
  62         return 0;
  63 }
  64
  65 static int bcm47xxnflash_remove(struct platform_device *pdev)
  66 {
  67         struct bcm47xxnflash *nflash = platform_get_drvdata(pdev);
  68
  69         nand_release(nand_to_mtd(&nflash->nand_chip));
  70
  71         return 0;
  72 }
  73
  74 static struct platform_driver bcm47xxnflash_driver = {
  75         .probe  = bcm47xxnflash_probe,
  76         .remove = bcm47xxnflash_remove,
  77         .driver = {
  78                 .name = "bcma_nflash",
  79         },
  80 };
  81
  82 module_platform_driver(bcm47xxnflash_driver);