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Commit | Line | Data |
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711fdf62 VW |
1 | /* |
2 | * Generic NAND driver | |
3 | * | |
4 | * Author: Vitaly Wool <vitalywool@gmail.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | */ | |
11 | ||
ffdac7cd | 12 | #include <linux/err.h> |
711fdf62 VW |
13 | #include <linux/io.h> |
14 | #include <linux/module.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/mtd/mtd.h> | |
18 | #include <linux/mtd/nand.h> | |
19 | #include <linux/mtd/partitions.h> | |
20 | ||
21 | struct plat_nand_data { | |
22 | struct nand_chip chip; | |
23 | struct mtd_info mtd; | |
24 | void __iomem *io_base; | |
711fdf62 VW |
25 | }; |
26 | ||
f2e5a244 HS |
27 | static const char *part_probe_types[] = { "cmdlinepart", NULL }; |
28 | ||
711fdf62 VW |
29 | /* |
30 | * Probe for the NAND device. | |
31 | */ | |
06f25510 | 32 | static int plat_nand_probe(struct platform_device *pdev) |
711fdf62 | 33 | { |
453810b7 | 34 | struct platform_nand_data *pdata = dev_get_platdata(&pdev->dev); |
a4f20351 | 35 | struct mtd_part_parser_data ppdata; |
711fdf62 | 36 | struct plat_nand_data *data; |
2d098a72 | 37 | struct resource *res; |
f2e5a244 | 38 | const char **part_types; |
2d098a72 HS |
39 | int err = 0; |
40 | ||
da3888cb JC |
41 | if (!pdata) { |
42 | dev_err(&pdev->dev, "platform_nand_data is missing\n"); | |
43 | return -EINVAL; | |
44 | } | |
45 | ||
01cd2aba MV |
46 | if (pdata->chip.nr_chips < 1) { |
47 | dev_err(&pdev->dev, "invalid number of chips specified\n"); | |
48 | return -EINVAL; | |
49 | } | |
50 | ||
711fdf62 | 51 | /* Allocate memory for the device structure (and zero it) */ |
ffdac7cd JH |
52 | data = devm_kzalloc(&pdev->dev, sizeof(struct plat_nand_data), |
53 | GFP_KERNEL); | |
a01eb204 | 54 | if (!data) |
711fdf62 | 55 | return -ENOMEM; |
711fdf62 | 56 | |
840f53c3 | 57 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
ffdac7cd JH |
58 | data->io_base = devm_ioremap_resource(&pdev->dev, res); |
59 | if (IS_ERR(data->io_base)) | |
60 | return PTR_ERR(data->io_base); | |
711fdf62 VW |
61 | |
62 | data->chip.priv = &data; | |
63 | data->mtd.priv = &data->chip; | |
64 | data->mtd.owner = THIS_MODULE; | |
475b44c1 | 65 | data->mtd.name = dev_name(&pdev->dev); |
711fdf62 VW |
66 | |
67 | data->chip.IO_ADDR_R = data->io_base; | |
68 | data->chip.IO_ADDR_W = data->io_base; | |
69 | data->chip.cmd_ctrl = pdata->ctrl.cmd_ctrl; | |
70 | data->chip.dev_ready = pdata->ctrl.dev_ready; | |
71 | data->chip.select_chip = pdata->ctrl.select_chip; | |
d6fed9e9 AC |
72 | data->chip.write_buf = pdata->ctrl.write_buf; |
73 | data->chip.read_buf = pdata->ctrl.read_buf; | |
b4f7aa84 | 74 | data->chip.read_byte = pdata->ctrl.read_byte; |
711fdf62 VW |
75 | data->chip.chip_delay = pdata->chip.chip_delay; |
76 | data->chip.options |= pdata->chip.options; | |
a40f7341 | 77 | data->chip.bbt_options |= pdata->chip.bbt_options; |
711fdf62 VW |
78 | |
79 | data->chip.ecc.hwctl = pdata->ctrl.hwcontrol; | |
80 | data->chip.ecc.layout = pdata->chip.ecclayout; | |
81 | data->chip.ecc.mode = NAND_ECC_SOFT; | |
82 | ||
83 | platform_set_drvdata(pdev, data); | |
84 | ||
bf95efd4 HS |
85 | /* Handle any platform specific setup */ |
86 | if (pdata->ctrl.probe) { | |
2d098a72 HS |
87 | err = pdata->ctrl.probe(pdev); |
88 | if (err) | |
bf95efd4 HS |
89 | goto out; |
90 | } | |
91 | ||
25985edc | 92 | /* Scan to find existence of the device */ |
81cbb0b1 | 93 | if (nand_scan(&data->mtd, pdata->chip.nr_chips)) { |
2d098a72 | 94 | err = -ENXIO; |
711fdf62 VW |
95 | goto out; |
96 | } | |
97 | ||
f2e5a244 HS |
98 | part_types = pdata->chip.part_probe_types ? : part_probe_types; |
99 | ||
a4f20351 JC |
100 | ppdata.of_node = pdev->dev.of_node; |
101 | err = mtd_device_parse_register(&data->mtd, part_types, &ppdata, | |
42d7fbe2 AB |
102 | pdata->chip.partitions, |
103 | pdata->chip.nr_partitions); | |
711fdf62 | 104 | |
2d098a72 HS |
105 | if (!err) |
106 | return err; | |
711fdf62 VW |
107 | |
108 | nand_release(&data->mtd); | |
109 | out: | |
bf95efd4 HS |
110 | if (pdata->ctrl.remove) |
111 | pdata->ctrl.remove(pdev); | |
2d098a72 | 112 | return err; |
711fdf62 VW |
113 | } |
114 | ||
115 | /* | |
116 | * Remove a NAND device. | |
117 | */ | |
810b7e06 | 118 | static int plat_nand_remove(struct platform_device *pdev) |
711fdf62 VW |
119 | { |
120 | struct plat_nand_data *data = platform_get_drvdata(pdev); | |
453810b7 | 121 | struct platform_nand_data *pdata = dev_get_platdata(&pdev->dev); |
711fdf62 VW |
122 | |
123 | nand_release(&data->mtd); | |
bf95efd4 HS |
124 | if (pdata->ctrl.remove) |
125 | pdata->ctrl.remove(pdev); | |
711fdf62 VW |
126 | |
127 | return 0; | |
128 | } | |
129 | ||
a4f20351 JC |
130 | static const struct of_device_id plat_nand_match[] = { |
131 | { .compatible = "gen_nand" }, | |
132 | {}, | |
133 | }; | |
134 | MODULE_DEVICE_TABLE(of, plat_nand_match); | |
135 | ||
711fdf62 | 136 | static struct platform_driver plat_nand_driver = { |
a4f20351 | 137 | .probe = plat_nand_probe, |
5153b88c | 138 | .remove = plat_nand_remove, |
a4f20351 JC |
139 | .driver = { |
140 | .name = "gen_nand", | |
141 | .owner = THIS_MODULE, | |
142 | .of_match_table = plat_nand_match, | |
711fdf62 VW |
143 | }, |
144 | }; | |
145 | ||
f99640de | 146 | module_platform_driver(plat_nand_driver); |
711fdf62 VW |
147 | |
148 | MODULE_LICENSE("GPL"); | |
149 | MODULE_AUTHOR("Vitaly Wool"); | |
150 | MODULE_DESCRIPTION("Simple generic NAND driver"); | |
1ff18422 | 151 | MODULE_ALIAS("platform:gen_nand"); |