Release 4.11 drivers/mtd/nand/plat_nand.c
/*
* Generic NAND driver
*
* Author: Vitaly Wool <vitalywool@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/err.h>
#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;
void __iomem *io_base;
};
/*
* Probe for the NAND device.
*/
static int plat_nand_probe(struct platform_device *pdev)
{
struct platform_nand_data *pdata = dev_get_platdata(&pdev->dev);
struct plat_nand_data *data;
struct mtd_info *mtd;
struct resource *res;
const char **part_types;
int err = 0;
if (!pdata) {
dev_err(&pdev->dev, "platform_nand_data is missing\n");
return -EINVAL;
}
if (pdata->chip.nr_chips < 1) {
dev_err(&pdev->dev, "invalid number of chips specified\n");
return -EINVAL;
}
/* Allocate memory for the device structure (and zero it) */
data = devm_kzalloc(&pdev->dev, sizeof(struct plat_nand_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
data->io_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(data->io_base))
return PTR_ERR(data->io_base);
nand_set_flash_node(&data->chip, pdev->dev.of_node);
mtd = nand_to_mtd(&data->chip);
mtd->dev.parent = &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.read_byte = pdata->ctrl.read_byte;
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.mode = NAND_ECC_SOFT;
data->chip.ecc.algo = NAND_ECC_HAMMING;
platform_set_drvdata(pdev, data);
/* Handle any platform specific setup */
if (pdata->ctrl.probe) {
err = pdata->ctrl.probe(pdev);
if (err)
goto out;
}
/* Scan to find existence of the device */
err = nand_scan(mtd, pdata->chip.nr_chips);
if (err)
goto out;
part_types = pdata->chip.part_probe_types;
err = mtd_device_parse_register(mtd, part_types, NULL,
pdata->chip.partitions,
pdata->chip.nr_partitions);
if (!err)
return err;
nand_release(mtd);
out:
if (pdata->ctrl.remove)
pdata->ctrl.remove(pdev);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Vitaly Wool | 216 | 44.35% | 1 | 4.55% |
| H Hartley Sweeten | 80 | 16.43% | 3 | 13.64% |
| John Crispin | 33 | 6.78% | 2 | 9.09% |
| Marek Vašut | 31 | 6.37% | 2 | 9.09% |
| Brian Norris | 27 | 5.54% | 2 | 9.09% |
| Alexander Clouter | 24 | 4.93% | 1 | 4.55% |
| Jingoo Han | 22 | 4.52% | 2 | 9.09% |
| Boris Brezillon | 14 | 2.87% | 1 | 4.55% |
| Wei Yongjun | 11 | 2.26% | 1 | 4.55% |
| Rafał Miłecki | 10 | 2.05% | 1 | 4.55% |
| Hamish Moffatt | 8 | 1.64% | 1 | 4.55% |
| Masahiro Yamada | 6 | 1.23% | 1 | 4.55% |
| Frans Klaver | 2 | 0.41% | 1 | 4.55% |
| Lucas De Marchi | 1 | 0.21% | 1 | 4.55% |
| Dmitry Baryshkov | 1 | 0.21% | 1 | 4.55% |
| Kay Sievers | 1 | 0.21% | 1 | 4.55% |
| Total | 487 | 100.00% | 22 | 100.00% |
/*
* Remove a NAND device.
*/
static int plat_nand_remove(struct platform_device *pdev)
{
struct plat_nand_data *data = platform_get_drvdata(pdev);
struct platform_nand_data *pdata = dev_get_platdata(&pdev->dev);
nand_release(nand_to_mtd(&data->chip));
if (pdata->ctrl.remove)
pdata->ctrl.remove(pdev);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Vitaly Wool | 42 | 64.62% | 1 | 25.00% |
| H Hartley Sweeten | 15 | 23.08% | 1 | 25.00% |
| Jingoo Han | 4 | 6.15% | 1 | 25.00% |
| Boris Brezillon | 4 | 6.15% | 1 | 25.00% |
| Total | 65 | 100.00% | 4 | 100.00% |
static const struct of_device_id plat_nand_match[] = {
{ .compatible = "gen_nand" },
{},
};
MODULE_DEVICE_TABLE(of, plat_nand_match);
static struct platform_driver plat_nand_driver = {
.probe = plat_nand_probe,
.remove = plat_nand_remove,
.driver = {
.name = "gen_nand",
.of_match_table = plat_nand_match,
},
};
module_platform_driver(plat_nand_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Vitaly Wool");
MODULE_DESCRIPTION("Simple generic NAND driver");
MODULE_ALIAS("platform:gen_nand");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Vitaly Wool | 343 | 50.81% | 1 | 4.00% |
| H Hartley Sweeten | 95 | 14.07% | 3 | 12.00% |
| John Crispin | 61 | 9.04% | 3 | 12.00% |
| Marek Vašut | 31 | 4.59% | 2 | 8.00% |
| Jingoo Han | 29 | 4.30% | 2 | 8.00% |
| Brian Norris | 27 | 4.00% | 2 | 8.00% |
| Alexander Clouter | 24 | 3.56% | 1 | 4.00% |
| Boris Brezillon | 18 | 2.67% | 1 | 4.00% |
| Wei Yongjun | 11 | 1.63% | 1 | 4.00% |
| Rafał Miłecki | 10 | 1.48% | 1 | 4.00% |
| Hamish Moffatt | 8 | 1.19% | 1 | 4.00% |
| Kay Sievers | 6 | 0.89% | 2 | 8.00% |
| Masahiro Yamada | 6 | 0.89% | 1 | 4.00% |
| Frans Klaver | 2 | 0.30% | 1 | 4.00% |
| Axel Lin | 2 | 0.30% | 1 | 4.00% |
| Dmitry Baryshkov | 1 | 0.15% | 1 | 4.00% |
| Lucas De Marchi | 1 | 0.15% | 1 | 4.00% |
| Total | 675 | 100.00% | 25 | 100.00% |
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