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
16MODULE_DESCRIPTION("NAND flash driver for BCMA bus");
17MODULE_LICENSE("GPL");
18MODULE_AUTHOR("Rafał Miłecki");
19
20static const char *probes[] = { "bcm47xxpart", NULL };
21
22static 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
60static int 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	return 0;
71}
72
73static struct platform_driver bcm47xxnflash_driver = {
74	.probe	= bcm47xxnflash_probe,
75	.remove = bcm47xxnflash_remove,
76	.driver = {
77		.name = "bcma_nflash",
78	},
79};
80
81module_platform_driver(bcm47xxnflash_driver);
82