drm/vmwgfx: Don't send bad flags to the host
[linux-2.6.git] / drivers / mtd / nand / plat_nand.c
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
12 #include <linux/io.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/slab.h>
16 #include <linux/mtd/mtd.h>
17 #include <linux/mtd/nand.h>
18 #include <linux/mtd/partitions.h>
19
20 struct plat_nand_data {
21         struct nand_chip        chip;
22         struct mtd_info         mtd;
23         void __iomem            *io_base;
24 #ifdef CONFIG_MTD_PARTITIONS
25         int                     nr_parts;
26         struct mtd_partition    *parts;
27 #endif
28 };
29
30 /*
31  * Probe for the NAND device.
32  */
33 static int __devinit plat_nand_probe(struct platform_device *pdev)
34 {
35         struct platform_nand_data *pdata = pdev->dev.platform_data;
36         struct plat_nand_data *data;
37         int res = 0;
38
39         /* Allocate memory for the device structure (and zero it) */
40         data = kzalloc(sizeof(struct plat_nand_data), GFP_KERNEL);
41         if (!data) {
42                 dev_err(&pdev->dev, "failed to allocate device structure.\n");
43                 return -ENOMEM;
44         }
45
46         data->io_base = ioremap(pdev->resource[0].start,
47                                 pdev->resource[0].end - pdev->resource[0].start + 1);
48         if (data->io_base == NULL) {
49                 dev_err(&pdev->dev, "ioremap failed\n");
50                 kfree(data);
51                 return -EIO;
52         }
53
54         data->chip.priv = &data;
55         data->mtd.priv = &data->chip;
56         data->mtd.owner = THIS_MODULE;
57         data->mtd.name = dev_name(&pdev->dev);
58
59         data->chip.IO_ADDR_R = data->io_base;
60         data->chip.IO_ADDR_W = data->io_base;
61         data->chip.cmd_ctrl = pdata->ctrl.cmd_ctrl;
62         data->chip.dev_ready = pdata->ctrl.dev_ready;
63         data->chip.select_chip = pdata->ctrl.select_chip;
64         data->chip.write_buf = pdata->ctrl.write_buf;
65         data->chip.read_buf = pdata->ctrl.read_buf;
66         data->chip.chip_delay = pdata->chip.chip_delay;
67         data->chip.options |= pdata->chip.options;
68
69         data->chip.ecc.hwctl = pdata->ctrl.hwcontrol;
70         data->chip.ecc.layout = pdata->chip.ecclayout;
71         data->chip.ecc.mode = NAND_ECC_SOFT;
72
73         platform_set_drvdata(pdev, data);
74
75         /* Handle any platform specific setup */
76         if (pdata->ctrl.probe) {
77                 res = pdata->ctrl.probe(pdev);
78                 if (res)
79                         goto out;
80         }
81
82         /* Scan to find existance of the device */
83         if (nand_scan(&data->mtd, 1)) {
84                 res = -ENXIO;
85                 goto out;
86         }
87
88 #ifdef CONFIG_MTD_PARTITIONS
89         if (pdata->chip.part_probe_types) {
90                 res = parse_mtd_partitions(&data->mtd,
91                                         pdata->chip.part_probe_types,
92                                         &data->parts, 0);
93                 if (res > 0) {
94                         add_mtd_partitions(&data->mtd, data->parts, res);
95                         return 0;
96                 }
97         }
98         if (pdata->chip.set_parts)
99                 pdata->chip.set_parts(data->mtd.size, &pdata->chip);
100         if (pdata->chip.partitions) {
101                 data->parts = pdata->chip.partitions;
102                 res = add_mtd_partitions(&data->mtd, data->parts,
103                         pdata->chip.nr_partitions);
104         } else
105 #endif
106         res = add_mtd_device(&data->mtd);
107
108         if (!res)
109                 return res;
110
111         nand_release(&data->mtd);
112 out:
113         if (pdata->ctrl.remove)
114                 pdata->ctrl.remove(pdev);
115         platform_set_drvdata(pdev, NULL);
116         iounmap(data->io_base);
117         kfree(data);
118         return res;
119 }
120
121 /*
122  * Remove a NAND device.
123  */
124 static int __devexit plat_nand_remove(struct platform_device *pdev)
125 {
126         struct plat_nand_data *data = platform_get_drvdata(pdev);
127         struct platform_nand_data *pdata = pdev->dev.platform_data;
128
129         nand_release(&data->mtd);
130 #ifdef CONFIG_MTD_PARTITIONS
131         if (data->parts && data->parts != pdata->chip.partitions)
132                 kfree(data->parts);
133 #endif
134         if (pdata->ctrl.remove)
135                 pdata->ctrl.remove(pdev);
136         iounmap(data->io_base);
137         kfree(data);
138
139         return 0;
140 }
141
142 static struct platform_driver plat_nand_driver = {
143         .probe          = plat_nand_probe,
144         .remove         = __devexit_p(plat_nand_remove),
145         .driver         = {
146                 .name   = "gen_nand",
147                 .owner  = THIS_MODULE,
148         },
149 };
150
151 static int __init plat_nand_init(void)
152 {
153         return platform_driver_register(&plat_nand_driver);
154 }
155
156 static void __exit plat_nand_exit(void)
157 {
158         platform_driver_unregister(&plat_nand_driver);
159 }
160
161 module_init(plat_nand_init);
162 module_exit(plat_nand_exit);
163
164 MODULE_LICENSE("GPL");
165 MODULE_AUTHOR("Vitaly Wool");
166 MODULE_DESCRIPTION("Simple generic NAND driver");
167 MODULE_ALIAS("platform:gen_nand");