mtd: prepare place for BCMA NAND flash driver(s) (a5401370) · Commits · 戴 / test

drivers/mtd/nand/Kconfig

+9 −0

Original line number	Diff line number	Diff line
		@@ -460,6 +460,15 @@ config MTD_NAND_GPMI_NAND
		block, such as SD card. So pay attention to it when you enable
		the GPMI.

		config MTD_NAND_BCM47XXNFLASH
		tristate "R/O support for NAND flash on BCMA bus"
		depends on BCMA_NFLASH
		help
		BCMA bus can have various flash memories attached, they are
		registered by bcma as platform devices. This enables driver for
		NAND flash memories. For now only read mode for BCM4706 is
		implemented.

		config MTD_NAND_PLATFORM
		tristate "Support for generic platform NAND driver"
		depends on HAS_IOMEM

drivers/mtd/nand/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -54,5 +54,6 @@ obj-$(CONFIG_MTD_NAND_RICOH) += r852.o
		obj-$(CONFIG_MTD_NAND_JZ4740) += jz4740_nand.o
		obj-$(CONFIG_MTD_NAND_GPMI_NAND) += gpmi-nand/
		obj-$(CONFIG_MTD_NAND_XWAY) += xway_nand.o
		obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH) += bcm47xxnflash/

		nand-objs := nand_base.o nand_bbt.o

drivers/mtd/nand/bcm47xxnflash/Makefile

0 → 100644

+3 −0

Original line number	Diff line number	Diff line
		bcm47xxnflash-y += main.o

		obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH) += bcm47xxnflash.o

drivers/mtd/nand/bcm47xxnflash/bcm47xxnflash.h

0 → 100644

+14 −0

Original line number	Diff line number	Diff line
		#ifndef __BCM47XXNFLASH_H
		#define __BCM47XXNFLASH_H

		#include <linux/mtd/mtd.h>
		#include <linux/mtd/nand.h>

		struct bcm47xxnflash {
		struct bcma_drv_cc *cc;

		struct nand_chip nand_chip;
		struct mtd_info mtd;
		};

		#endif /* BCM47XXNFLASH */

drivers/mtd/nand/bcm47xxnflash/main.c

0 → 100644

+108 −0

Original line number	Diff line number	Diff line
		/*
		* BCM47XX NAND flash driver
		*
		* Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*
		*/

		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/slab.h>
		#include <linux/platform_device.h>
		#include <linux/bcma/bcma.h>

		#include "bcm47xxnflash.h"

		MODULE_DESCRIPTION("NAND flash driver for BCMA bus");
		MODULE_LICENSE("GPL");
		MODULE_AUTHOR("Rafał Miłecki");

		static const char *probes[] = { "bcm47xxpart", NULL };

		static int bcm47xxnflash_probe(struct platform_device *pdev)
		{
		struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev);
		struct bcm47xxnflash *b47n;
		int err = 0;

		b47n = kzalloc(sizeof(*b47n), GFP_KERNEL);
		if (!b47n) {
		err = -ENOMEM;
		goto out;
		}

		b47n->nand_chip.priv = b47n;
		b47n->mtd.owner = THIS_MODULE;
		b47n->mtd.priv = &b47n->nand_chip; /* Required */
		b47n->cc = container_of(nflash, struct bcma_drv_cc, nflash);

		if (0) {
		/* TODO: init device */
		} else {
		pr_err("Device not supported\n");
		err = -ENOTSUPP;
		}
		if (err) {
		pr_err("Initialization failed: %d\n", err);
		goto err_init;
		}

		err = mtd_device_parse_register(&b47n->mtd, probes, NULL, NULL, 0);
		if (err) {
		pr_err("Failed to register MTD device: %d\n", err);
		goto err_dev_reg;
		}

		return 0;

		err_dev_reg:
		err_init:
		kfree(b47n);
		out:
		return err;
		}

		static int __devexit bcm47xxnflash_remove(struct platform_device *pdev)
		{
		struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev);

		if (nflash->mtd)
		mtd_device_unregister(nflash->mtd);

		return 0;
		}

		static struct platform_driver bcm47xxnflash_driver = {
		.remove = __devexit_p(bcm47xxnflash_remove),
		.driver = {
		.name = "bcma_nflash",
		.owner = THIS_MODULE,
		},
		};

		static int __init bcm47xxnflash_init(void)
		{
		int err;

		/*
		* Platform device "bcma_nflash" exists on SoCs and is registered very
		* early, it won't be added during runtime (use platform_driver_probe).
		*/
		err = platform_driver_probe(&bcm47xxnflash_driver, bcm47xxnflash_probe);
		if (err)
		pr_err("Failed to register serial flash driver: %d\n", err);

		return err;
		}

		static void __exit bcm47xxnflash_exit(void)
		{
		platform_driver_unregister(&bcm47xxnflash_driver);
		}

		module_init(bcm47xxnflash_init);
		module_exit(bcm47xxnflash_exit);

Admin message