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112 lines
2.7 KiB
112 lines
2.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (c) 2005 Samsung Electronics |
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* Kyungmin Park <[email protected]> |
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* |
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* Overview: |
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* This is a device driver for the OneNAND flash for generic boards. |
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*/ |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/platform_device.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/onenand.h> |
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#include <linux/mtd/partitions.h> |
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#include <linux/io.h> |
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/* |
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* Note: Driver name and platform data format have been updated! |
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* |
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* This version of the driver is named "onenand-flash" and takes struct |
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* onenand_platform_data as platform data. The old ARM-specific version |
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* with the name "onenand" used to take struct flash_platform_data. |
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*/ |
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#define DRIVER_NAME "onenand-flash" |
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struct onenand_info { |
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struct mtd_info mtd; |
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struct onenand_chip onenand; |
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}; |
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static int generic_onenand_probe(struct platform_device *pdev) |
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{ |
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struct onenand_info *info; |
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struct onenand_platform_data *pdata = dev_get_platdata(&pdev->dev); |
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struct resource *res = pdev->resource; |
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unsigned long size = resource_size(res); |
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int err; |
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info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL); |
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if (!info) |
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return -ENOMEM; |
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if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) { |
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err = -EBUSY; |
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goto out_free_info; |
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} |
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info->onenand.base = ioremap(res->start, size); |
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if (!info->onenand.base) { |
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err = -ENOMEM; |
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goto out_release_mem_region; |
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} |
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info->onenand.mmcontrol = pdata ? pdata->mmcontrol : NULL; |
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info->onenand.irq = platform_get_irq(pdev, 0); |
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info->mtd.dev.parent = &pdev->dev; |
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info->mtd.priv = &info->onenand; |
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if (onenand_scan(&info->mtd, 1)) { |
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err = -ENXIO; |
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goto out_iounmap; |
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} |
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err = mtd_device_register(&info->mtd, pdata ? pdata->parts : NULL, |
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pdata ? pdata->nr_parts : 0); |
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platform_set_drvdata(pdev, info); |
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return 0; |
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out_iounmap: |
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iounmap(info->onenand.base); |
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out_release_mem_region: |
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release_mem_region(res->start, size); |
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out_free_info: |
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kfree(info); |
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return err; |
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} |
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static int generic_onenand_remove(struct platform_device *pdev) |
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{ |
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struct onenand_info *info = platform_get_drvdata(pdev); |
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struct resource *res = pdev->resource; |
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unsigned long size = resource_size(res); |
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if (info) { |
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onenand_release(&info->mtd); |
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release_mem_region(res->start, size); |
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iounmap(info->onenand.base); |
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kfree(info); |
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} |
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return 0; |
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} |
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static struct platform_driver generic_onenand_driver = { |
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.driver = { |
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.name = DRIVER_NAME, |
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}, |
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.probe = generic_onenand_probe, |
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.remove = generic_onenand_remove, |
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}; |
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module_platform_driver(generic_onenand_driver); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Kyungmin Park <[email protected]>"); |
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MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards"); |
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MODULE_ALIAS("platform:" DRIVER_NAME);
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