1 /*
2  * NXP GPMI NAND flash driver (DT initialization)
3  *
4  * Copyright (C) 2018 Toradex
5  * Authors:
6  * Stefan Agner <stefan.agner@toradex.com>
7  *
8  * Based on denali_dt.c
9  *
10  * SPDX-License-Identifier:	GPL-2.0+
11  */
12 
13 #include <dm.h>
14 #include <linux/io.h>
15 #include <linux/ioport.h>
16 #include <linux/printk.h>
17 
18 #include "mxs_nand.h"
19 
20 struct mxs_nand_dt_data {
21 	unsigned int max_ecc_strength_supported;
22 };
23 
24 static const struct mxs_nand_dt_data mxs_nand_imx6q_data = {
25 	.max_ecc_strength_supported = 40,
26 };
27 
28 static const struct mxs_nand_dt_data mxs_nand_imx7d_data = {
29 	.max_ecc_strength_supported = 62,
30 };
31 
32 static const struct udevice_id mxs_nand_dt_ids[] = {
33 	{
34 		.compatible = "fsl,imx6q-gpmi-nand",
35 		.data = (unsigned long)&mxs_nand_imx6q_data,
36 	},
37 	{
38 		.compatible = "fsl,imx7d-gpmi-nand",
39 		.data = (unsigned long)&mxs_nand_imx7d_data,
40 	},
41 	{ /* sentinel */ }
42 };
43 
44 static int mxs_nand_dt_probe(struct udevice *dev)
45 {
46 	struct mxs_nand_info *info = dev_get_priv(dev);
47 	const struct mxs_nand_dt_data *data;
48 	struct resource res;
49 	int ret;
50 
51 	data = (void *)dev_get_driver_data(dev);
52 	if (data)
53 		info->max_ecc_strength_supported = data->max_ecc_strength_supported;
54 
55 	info->dev = dev;
56 
57 	ret = dev_read_resource_byname(dev, "gpmi-nand", &res);
58 	if (ret)
59 		return ret;
60 
61 	info->gpmi_regs = devm_ioremap(dev, res.start, resource_size(&res));
62 
63 
64 	ret = dev_read_resource_byname(dev, "bch", &res);
65 	if (ret)
66 		return ret;
67 
68 	info->bch_regs = devm_ioremap(dev, res.start, resource_size(&res));
69 
70 	info->use_minimum_ecc = dev_read_bool(dev, "fsl,use-minimum-ecc");
71 
72 	return mxs_nand_init_ctrl(info);
73 }
74 
75 U_BOOT_DRIVER(mxs_nand_dt) = {
76 	.name = "mxs-nand-dt",
77 	.id = UCLASS_MTD,
78 	.of_match = mxs_nand_dt_ids,
79 	.probe = mxs_nand_dt_probe,
80 	.priv_auto_alloc_size = sizeof(struct mxs_nand_info),
81 };
82 
83 void board_nand_init(void)
84 {
85 	struct udevice *dev;
86 	int ret;
87 
88 	ret = uclass_get_device_by_driver(UCLASS_MTD,
89 					  DM_GET_DRIVER(mxs_nand_dt),
90 					  &dev);
91 	if (ret && ret != -ENODEV)
92 		pr_err("Failed to initialize MXS NAND controller. (error %d)\n",
93 		       ret);
94 }
95