1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BCM47XX NAND flash driver 4 * 5 * Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com> 6 */ 7 8 #include "bcm47xxnflash.h" 9 10 #include <linux/module.h> 11 #include <linux/kernel.h> 12 #include <linux/slab.h> 13 #include <linux/platform_device.h> 14 #include <linux/bcma/bcma.h> 15 16 MODULE_DESCRIPTION("NAND flash driver for BCMA bus"); 17 MODULE_LICENSE("GPL"); 18 MODULE_AUTHOR("Rafał Miłecki"); 19 20 static const char *probes[] = { "bcm47xxpart", NULL }; 21 22 static int bcm47xxnflash_probe(struct platform_device *pdev) 23 { 24 struct bcma_nflash *nflash = dev_get_platdata(&pdev->dev); 25 struct bcm47xxnflash *b47n; 26 struct mtd_info *mtd; 27 int err = 0; 28 29 b47n = devm_kzalloc(&pdev->dev, sizeof(*b47n), GFP_KERNEL); 30 if (!b47n) 31 return -ENOMEM; 32 33 nand_set_controller_data(&b47n->nand_chip, b47n); 34 mtd = nand_to_mtd(&b47n->nand_chip); 35 mtd->dev.parent = &pdev->dev; 36 b47n->cc = container_of(nflash, struct bcma_drv_cc, nflash); 37 38 if (b47n->cc->core->bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) { 39 err = bcm47xxnflash_ops_bcm4706_init(b47n); 40 } else { 41 pr_err("Device not supported\n"); 42 err = -ENOTSUPP; 43 } 44 if (err) { 45 pr_err("Initialization failed: %d\n", err); 46 return err; 47 } 48 49 platform_set_drvdata(pdev, b47n); 50 51 err = mtd_device_parse_register(mtd, probes, NULL, NULL, 0); 52 if (err) { 53 pr_err("Failed to register MTD device: %d\n", err); 54 return err; 55 } 56 57 return 0; 58 } 59 60 static void bcm47xxnflash_remove(struct platform_device *pdev) 61 { 62 struct bcm47xxnflash *nflash = platform_get_drvdata(pdev); 63 struct nand_chip *chip = &nflash->nand_chip; 64 int ret; 65 66 ret = mtd_device_unregister(nand_to_mtd(chip)); 67 WARN_ON(ret); 68 nand_cleanup(chip); 69 } 70 71 static struct platform_driver bcm47xxnflash_driver = { 72 .probe = bcm47xxnflash_probe, 73 .remove_new = bcm47xxnflash_remove, 74 .driver = { 75 .name = "bcma_nflash", 76 }, 77 }; 78 79 module_platform_driver(bcm47xxnflash_driver); 80