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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 
 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         int err = 0;
 31 
 32         b47n = devm_kzalloc(&pdev->dev, sizeof(*b47n), GFP_KERNEL);
 33         if (!b47n)
 34                 return -ENOMEM;
 35 
 36         b47n->nand_chip.priv = b47n;
 37         b47n->mtd.owner = THIS_MODULE;
 38         b47n->mtd.priv = &b47n->nand_chip; /* Required */
 39         b47n->cc = container_of(nflash, struct bcma_drv_cc, nflash);
 40 
 41         if (b47n->cc->core->bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) {
 42                 err = bcm47xxnflash_ops_bcm4706_init(b47n);
 43         } else {
 44                 pr_err("Device not supported\n");
 45                 err = -ENOTSUPP;
 46         }
 47         if (err) {
 48                 pr_err("Initialization failed: %d\n", err);
 49                 return err;
 50         }
 51 
 52         err = mtd_device_parse_register(&b47n->mtd, probes, NULL, NULL, 0);
 53         if (err) {
 54                 pr_err("Failed to register MTD device: %d\n", err);
 55                 return err;
 56         }
 57 
 58         return 0;
 59 }
 60 
 61 static int bcm47xxnflash_remove(struct platform_device *pdev)
 62 {
 63         struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev);
 64 
 65         if (nflash->mtd)
 66                 mtd_device_unregister(nflash->mtd);
 67 
 68         return 0;
 69 }
 70 
 71 static struct platform_driver bcm47xxnflash_driver = {
 72         .probe  = bcm47xxnflash_probe,
 73         .remove = bcm47xxnflash_remove,
 74         .driver = {
 75                 .name = "bcma_nflash",
 76                 .owner = THIS_MODULE,
 77         },
 78 };
 79 
 80 module_platform_driver(bcm47xxnflash_driver);
 81 

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