- 根目录:
- drivers
- mtd
- nand
- plat_nand.c
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
struct plat_nand_data {
struct nand_chip chip;
struct mtd_info mtd;
void __iomem *io_base;
};
static int __devinit plat_nand_probe(struct platform_device *pdev)
{
struct platform_nand_data *pdata = pdev->dev.platform_data;
struct plat_nand_data *data;
struct resource *res;
int err = 0;
if (pdata->chip.nr_chips < 1) {
dev_err(&pdev->dev, "invalid number of chips specified\n");
return -EINVAL;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENXIO;
data = kzalloc(sizeof(struct plat_nand_data), GFP_KERNEL);
if (!data) {
dev_err(&pdev->dev, "failed to allocate device structure.\n");
return -ENOMEM;
}
if (!request_mem_region(res->start, resource_size(res),
dev_name(&pdev->dev))) {
dev_err(&pdev->dev, "request_mem_region failed\n");
err = -EBUSY;
goto out_free;
}
data->io_base = ioremap(res->start, resource_size(res));
if (data->io_base == NULL) {
dev_err(&pdev->dev, "ioremap failed\n");
err = -EIO;
goto out_release_io;
}
data->chip.priv = &data;
data->mtd.priv = &data->chip;
data->mtd.owner = THIS_MODULE;
data->mtd.name = dev_name(&pdev->dev);
data->chip.IO_ADDR_R = data->io_base;
data->chip.IO_ADDR_W = data->io_base;
data->chip.cmd_ctrl = pdata->ctrl.cmd_ctrl;
data->chip.dev_ready = pdata->ctrl.dev_ready;
data->chip.select_chip = pdata->ctrl.select_chip;
data->chip.write_buf = pdata->ctrl.write_buf;
data->chip.read_buf = pdata->ctrl.read_buf;
data->chip.chip_delay = pdata->chip.chip_delay;
data->chip.options |= pdata->chip.options;
data->chip.bbt_options |= pdata->chip.bbt_options;
data->chip.ecc.hwctl = pdata->ctrl.hwcontrol;
data->chip.ecc.layout = pdata->chip.ecclayout;
data->chip.ecc.mode = NAND_ECC_SOFT;
platform_set_drvdata(pdev, data);
if (pdata->ctrl.probe) {
err = pdata->ctrl.probe(pdev);
if (err)
goto out;
}
if (nand_scan(&data->mtd, pdata->chip.nr_chips)) {
err = -ENXIO;
goto out;
}
err = mtd_device_parse_register(&data->mtd,
pdata->chip.part_probe_types, 0,
pdata->chip.partitions, pdata->chip.nr_partitions);
if (!err)
return err;
nand_release(&data->mtd);
out:
if (pdata->ctrl.remove)
pdata->ctrl.remove(pdev);
platform_set_drvdata(pdev, NULL);
iounmap(data->io_base);
out_release_io:
release_mem_region(res->start, resource_size(res));
out_free:
kfree(data);
return err;
}
static int __devexit plat_nand_remove(struct platform_device *pdev)
{
struct plat_nand_data *data = platform_get_drvdata(pdev);
struct platform_nand_data *pdata = pdev->dev.platform_data;
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
nand_release(&data->mtd);
if (pdata->ctrl.remove)
pdata->ctrl.remove(pdev);
iounmap(data->io_base);
release_mem_region(res->start, resource_size(res));
kfree(data);
return 0;
}
static struct platform_driver plat_nand_driver = {
.probe = plat_nand_probe,
.remove = __devexit_p(plat_nand_remove),
.driver = {
.name = "gen_nand",
.owner = THIS_MODULE,
},
};
module_platform_driver(plat_nand_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Vitaly Wool");
MODULE_DESCRIPTION("Simple generic NAND driver");
MODULE_ALIAS("platform:gen_nand");
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
- 81
- 82
- 83
- 84
- 85
- 86
- 87
- 88
- 89
- 90
- 91
- 92
- 93
- 94
- 95
- 96
- 97
- 98
- 99
- 100
- 101
- 102
- 103
- 104
- 105
- 106
- 107
- 108
- 109
- 110
- 111
- 112
- 113
- 114
- 115
- 116
- 117
- 118
- 119
- 120
- 121
- 122
- 123
- 124
- 125
- 126
- 127
- 128
- 129
- 130
- 131
- 132
- 133
- 134
- 135
- 136
- 137
- 138
- 139
- 140
- 141
- 142
- 143
- 144
- 145
- 146
- 147
- 148
- 149
- 150
- 151
- 152
- 153
- 154
- 155
- 156