This source file includes following definitions.
- plat_nand_probe
- plat_nand_remove
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8 #include <linux/err.h>
9 #include <linux/io.h>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/slab.h>
13 #include <linux/mtd/mtd.h>
14 #include <linux/mtd/platnand.h>
15
16 struct plat_nand_data {
17 struct nand_chip chip;
18 void __iomem *io_base;
19 };
20
21
22
23
24 static int plat_nand_probe(struct platform_device *pdev)
25 {
26 struct platform_nand_data *pdata = dev_get_platdata(&pdev->dev);
27 struct plat_nand_data *data;
28 struct mtd_info *mtd;
29 struct resource *res;
30 const char **part_types;
31 int err = 0;
32
33 if (!pdata) {
34 dev_err(&pdev->dev, "platform_nand_data is missing\n");
35 return -EINVAL;
36 }
37
38 if (pdata->chip.nr_chips < 1) {
39 dev_err(&pdev->dev, "invalid number of chips specified\n");
40 return -EINVAL;
41 }
42
43
44 data = devm_kzalloc(&pdev->dev, sizeof(struct plat_nand_data),
45 GFP_KERNEL);
46 if (!data)
47 return -ENOMEM;
48
49 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
50 data->io_base = devm_ioremap_resource(&pdev->dev, res);
51 if (IS_ERR(data->io_base))
52 return PTR_ERR(data->io_base);
53
54 nand_set_flash_node(&data->chip, pdev->dev.of_node);
55 mtd = nand_to_mtd(&data->chip);
56 mtd->dev.parent = &pdev->dev;
57
58 data->chip.legacy.IO_ADDR_R = data->io_base;
59 data->chip.legacy.IO_ADDR_W = data->io_base;
60 data->chip.legacy.cmd_ctrl = pdata->ctrl.cmd_ctrl;
61 data->chip.legacy.dev_ready = pdata->ctrl.dev_ready;
62 data->chip.legacy.select_chip = pdata->ctrl.select_chip;
63 data->chip.legacy.write_buf = pdata->ctrl.write_buf;
64 data->chip.legacy.read_buf = pdata->ctrl.read_buf;
65 data->chip.legacy.chip_delay = pdata->chip.chip_delay;
66 data->chip.options |= pdata->chip.options;
67 data->chip.bbt_options |= pdata->chip.bbt_options;
68
69 data->chip.ecc.mode = NAND_ECC_SOFT;
70 data->chip.ecc.algo = NAND_ECC_HAMMING;
71
72 platform_set_drvdata(pdev, data);
73
74
75 if (pdata->ctrl.probe) {
76 err = pdata->ctrl.probe(pdev);
77 if (err)
78 goto out;
79 }
80
81
82 err = nand_scan(&data->chip, pdata->chip.nr_chips);
83 if (err)
84 goto out;
85
86 part_types = pdata->chip.part_probe_types;
87
88 err = mtd_device_parse_register(mtd, part_types, NULL,
89 pdata->chip.partitions,
90 pdata->chip.nr_partitions);
91
92 if (!err)
93 return err;
94
95 nand_release(&data->chip);
96 out:
97 if (pdata->ctrl.remove)
98 pdata->ctrl.remove(pdev);
99 return err;
100 }
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104
105 static int plat_nand_remove(struct platform_device *pdev)
106 {
107 struct plat_nand_data *data = platform_get_drvdata(pdev);
108 struct platform_nand_data *pdata = dev_get_platdata(&pdev->dev);
109
110 nand_release(&data->chip);
111 if (pdata->ctrl.remove)
112 pdata->ctrl.remove(pdev);
113
114 return 0;
115 }
116
117 static const struct of_device_id plat_nand_match[] = {
118 { .compatible = "gen_nand" },
119 {},
120 };
121 MODULE_DEVICE_TABLE(of, plat_nand_match);
122
123 static struct platform_driver plat_nand_driver = {
124 .probe = plat_nand_probe,
125 .remove = plat_nand_remove,
126 .driver = {
127 .name = "gen_nand",
128 .of_match_table = plat_nand_match,
129 },
130 };
131
132 module_platform_driver(plat_nand_driver);
133
134 MODULE_LICENSE("GPL");
135 MODULE_AUTHOR("Vitaly Wool");
136 MODULE_DESCRIPTION("Simple generic NAND driver");
137 MODULE_ALIAS("platform:gen_nand");