d384b974df1c9c8cbc6498133f11a667ce0d4744
[platform/kernel/u-boot.git] / drivers / mtd / nand / raw / denali_dt.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2017 Socionext Inc.
4  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
5  */
6
7 #include <clk.h>
8 #include <dm.h>
9 #include <linux/io.h>
10 #include <linux/ioport.h>
11 #include <linux/printk.h>
12
13 #include "denali.h"
14
15 struct denali_dt_data {
16         unsigned int revision;
17         unsigned int caps;
18         const struct nand_ecc_caps *ecc_caps;
19 };
20
21 NAND_ECC_CAPS_SINGLE(denali_socfpga_ecc_caps, denali_calc_ecc_bytes,
22                      512, 8, 15);
23 static const struct denali_dt_data denali_socfpga_data = {
24         .caps = DENALI_CAP_HW_ECC_FIXUP,
25         .ecc_caps = &denali_socfpga_ecc_caps,
26 };
27
28 NAND_ECC_CAPS_SINGLE(denali_uniphier_v5a_ecc_caps, denali_calc_ecc_bytes,
29                      1024, 8, 16, 24);
30 static const struct denali_dt_data denali_uniphier_v5a_data = {
31         .caps = DENALI_CAP_HW_ECC_FIXUP |
32                 DENALI_CAP_DMA_64BIT,
33         .ecc_caps = &denali_uniphier_v5a_ecc_caps,
34 };
35
36 NAND_ECC_CAPS_SINGLE(denali_uniphier_v5b_ecc_caps, denali_calc_ecc_bytes,
37                      1024, 8, 16);
38 static const struct denali_dt_data denali_uniphier_v5b_data = {
39         .revision = 0x0501,
40         .caps = DENALI_CAP_HW_ECC_FIXUP |
41                 DENALI_CAP_DMA_64BIT,
42         .ecc_caps = &denali_uniphier_v5b_ecc_caps,
43 };
44
45 static const struct udevice_id denali_nand_dt_ids[] = {
46         {
47                 .compatible = "altr,socfpga-denali-nand",
48                 .data = (unsigned long)&denali_socfpga_data,
49         },
50         {
51                 .compatible = "socionext,uniphier-denali-nand-v5a",
52                 .data = (unsigned long)&denali_uniphier_v5a_data,
53         },
54         {
55                 .compatible = "socionext,uniphier-denali-nand-v5b",
56                 .data = (unsigned long)&denali_uniphier_v5b_data,
57         },
58         { /* sentinel */ }
59 };
60
61 static int denali_dt_probe(struct udevice *dev)
62 {
63         struct denali_nand_info *denali = dev_get_priv(dev);
64         const struct denali_dt_data *data;
65         struct clk clk, clk_x, clk_ecc;
66         struct resource res;
67         int ret;
68
69         data = (void *)dev_get_driver_data(dev);
70         if (data) {
71                 denali->revision = data->revision;
72                 denali->caps = data->caps;
73                 denali->ecc_caps = data->ecc_caps;
74         }
75
76         denali->dev = dev;
77
78         ret = dev_read_resource_byname(dev, "denali_reg", &res);
79         if (ret)
80                 return ret;
81
82         denali->reg = devm_ioremap(dev, res.start, resource_size(&res));
83
84         ret = dev_read_resource_byname(dev, "nand_data", &res);
85         if (ret)
86                 return ret;
87
88         denali->host = devm_ioremap(dev, res.start, resource_size(&res));
89
90         ret = clk_get_by_name(dev, "nand", &clk);
91         if (ret)
92                 ret = clk_get_by_index(dev, 0, &clk);
93         if (ret)
94                 return ret;
95
96         ret = clk_get_by_name(dev, "nand_x", &clk_x);
97         if (ret)
98                 clk_x.dev = NULL;
99
100         ret = clk_get_by_name(dev, "ecc", &clk_ecc);
101         if (ret)
102                 clk_ecc.dev = NULL;
103
104         ret = clk_enable(&clk);
105         if (ret)
106                 return ret;
107
108         if (clk_x.dev) {
109                 ret = clk_enable(&clk_x);
110                 if (ret)
111                         return ret;
112         }
113
114         if (clk_ecc.dev) {
115                 ret = clk_enable(&clk_ecc);
116                 if (ret)
117                         return ret;
118         }
119
120         if (clk_x.dev) {
121                 denali->clk_rate = clk_get_rate(&clk);
122                 denali->clk_x_rate = clk_get_rate(&clk_x);
123         } else {
124                 /*
125                  * Hardcode the clock rates for the backward compatibility.
126                  * This works for both SOCFPGA and UniPhier.
127                  */
128                 dev_notice(dev,
129                            "necessary clock is missing. default clock rates are used.\n");
130                 denali->clk_rate = 50000000;
131                 denali->clk_x_rate = 200000000;
132         }
133
134         return denali_init(denali);
135 }
136
137 U_BOOT_DRIVER(denali_nand_dt) = {
138         .name = "denali-nand-dt",
139         .id = UCLASS_MISC,
140         .of_match = denali_nand_dt_ids,
141         .probe = denali_dt_probe,
142         .priv_auto_alloc_size = sizeof(struct denali_nand_info),
143 };
144
145 void board_nand_init(void)
146 {
147         struct udevice *dev;
148         int ret;
149
150         ret = uclass_get_device_by_driver(UCLASS_MISC,
151                                           DM_GET_DRIVER(denali_nand_dt),
152                                           &dev);
153         if (ret && ret != -ENODEV)
154                 pr_err("Failed to initialize Denali NAND controller. (error %d)\n",
155                        ret);
156 }