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
bcm47xxnflash_probe(struct platform_device * pdev)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
bcm47xxnflash_remove(struct platform_device * pdev)60 static 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
73 static struct platform_driver bcm47xxnflash_driver = {
74 .probe = bcm47xxnflash_probe,
75 .remove = bcm47xxnflash_remove,
76 .driver = {
77 .name = "bcma_nflash",
78 },
79 };
80
81 module_platform_driver(bcm47xxnflash_driver);
82