^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2005 Samsung Electronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Kyungmin Park <kyungmin.park@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Overview:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * This is a device driver for the OneNAND flash for generic boards.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mtd/onenand.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mtd/partitions.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * Note: Driver name and platform data format have been updated!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * This version of the driver is named "onenand-flash" and takes struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * onenand_platform_data as platform data. The old ARM-specific version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * with the name "onenand" used to take struct flash_platform_data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define DRIVER_NAME "onenand-flash"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct onenand_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct mtd_info mtd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct onenand_chip onenand;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static int generic_onenand_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct onenand_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct onenand_platform_data *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct resource *res = pdev->resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) unsigned long size = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) err = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) goto out_free_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) info->onenand.base = ioremap(res->start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (!info->onenand.base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) goto out_release_mem_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) info->onenand.mmcontrol = pdata ? pdata->mmcontrol : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) err = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) goto out_iounmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) info->onenand.irq = err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) info->mtd.dev.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) info->mtd.priv = &info->onenand;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (onenand_scan(&info->mtd, 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) err = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) goto out_iounmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) err = mtd_device_register(&info->mtd, pdata ? pdata->parts : NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) pdata ? pdata->nr_parts : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) platform_set_drvdata(pdev, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) out_iounmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) iounmap(info->onenand.base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) out_release_mem_region:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) release_mem_region(res->start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) out_free_info:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static int generic_onenand_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct onenand_info *info = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct resource *res = pdev->resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) unsigned long size = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) onenand_release(&info->mtd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) release_mem_region(res->start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) iounmap(info->onenand.base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static struct platform_driver generic_onenand_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .name = DRIVER_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .probe = generic_onenand_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .remove = generic_onenand_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) module_platform_driver(generic_onenand_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) MODULE_ALIAS("platform:" DRIVER_NAME);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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