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// SPDX-License-Identifier: GPL-2.0
/*
* NAND Flash Controller Device Driver for DT
*
* Copyright © 2011, Picochip.
*/
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include "denali.h"
struct denali_dt {
struct denali_controller controller;
struct clk *clk; /* core clock */
struct clk *clk_x; /* bus interface clock */
struct clk *clk_ecc; /* ECC circuit clock */
};
struct denali_dt_data {
unsigned int revision;
unsigned int caps;
unsigned int oob_skip_bytes;
const struct nand_ecc_caps *ecc_caps;
};
NAND_ECC_CAPS_SINGLE(denali_socfpga_ecc_caps, denali_calc_ecc_bytes,
512, 8, 15);
static const struct denali_dt_data denali_socfpga_data = {
.caps = DENALI_CAP_HW_ECC_FIXUP,
.oob_skip_bytes = 2,
.ecc_caps = &denali_socfpga_ecc_caps,
};
NAND_ECC_CAPS_SINGLE(denali_uniphier_v5a_ecc_caps, denali_calc_ecc_bytes,
1024, 8, 16, 24);
static const struct denali_dt_data denali_uniphier_v5a_data = {
.caps = DENALI_CAP_HW_ECC_FIXUP |
DENALI_CAP_DMA_64BIT,
.oob_skip_bytes = 8,
.ecc_caps = &denali_uniphier_v5a_ecc_caps,
};
NAND_ECC_CAPS_SINGLE(denali_uniphier_v5b_ecc_caps, denali_calc_ecc_bytes,
1024, 8, 16);
static const struct denali_dt_data denali_uniphier_v5b_data = {
.revision = 0x0501,
.caps = DENALI_CAP_HW_ECC_FIXUP |
DENALI_CAP_DMA_64BIT,
.oob_skip_bytes = 8,
.ecc_caps = &denali_uniphier_v5b_ecc_caps,
};
static const struct of_device_id denali_nand_dt_ids[] = {
{
.compatible = "altr,socfpga-denali-nand",
.data = &denali_socfpga_data,
},
{
.compatible = "socionext,uniphier-denali-nand-v5a",
.data = &denali_uniphier_v5a_data,
},
{
.compatible = "socionext,uniphier-denali-nand-v5b",
.data = &denali_uniphier_v5b_data,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, denali_nand_dt_ids);
static int denali_dt_chip_init(struct denali_controller *denali,
struct device_node *chip_np)
{
struct denali_chip *dchip;
u32 bank;
int nsels, i, ret;
nsels = of_property_count_u32_elems(chip_np, "reg");
if (nsels < 0)
return nsels;
dchip = devm_kzalloc(denali->dev, struct_size(dchip, sels, nsels),
GFP_KERNEL);
if (!dchip)
return -ENOMEM;
dchip->nsels = nsels;
for (i = 0; i < nsels; i++) {
ret = of_property_read_u32_index(chip_np, "reg", i, &bank);
if (ret)
return ret;
dchip->sels[i].bank = bank;
nand_set_flash_node(&dchip->chip, chip_np);
}
return denali_chip_init(denali, dchip);
}
static int denali_dt_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
struct denali_dt *dt;
const struct denali_dt_data *data;
struct denali_controller *denali;
struct device_node *np;
int ret;
dt = devm_kzalloc(dev, sizeof(*dt), GFP_KERNEL);
if (!dt)
return -ENOMEM;
denali = &dt->controller;
data = of_device_get_match_data(dev);
if (WARN_ON(!data))
return -EINVAL;
denali->revision = data->revision;
denali->caps = data->caps;
denali->oob_skip_bytes = data->oob_skip_bytes;
denali->ecc_caps = data->ecc_caps;
denali->dev = dev;
denali->irq = platform_get_irq(pdev, 0);
if (denali->irq < 0)
return denali->irq;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "denali_reg");
denali->reg = devm_ioremap_resource(dev, res);
if (IS_ERR(denali->reg))
return PTR_ERR(denali->reg);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_data");
denali->host = devm_ioremap_resource(dev, res);
if (IS_ERR(denali->host))
return PTR_ERR(denali->host);
dt->clk = devm_clk_get(dev, "nand");
if (IS_ERR(dt->clk))
return PTR_ERR(dt->clk);
dt->clk_x = devm_clk_get(dev, "nand_x");
if (IS_ERR(dt->clk_x))
return PTR_ERR(dt->clk_x);
dt->clk_ecc = devm_clk_get(dev, "ecc");
if (IS_ERR(dt->clk_ecc))
return PTR_ERR(dt->clk_ecc);
ret = clk_prepare_enable(dt->clk);
if (ret)
return ret;
ret = clk_prepare_enable(dt->clk_x);
if (ret)
goto out_disable_clk;
ret = clk_prepare_enable(dt->clk_ecc);
if (ret)
goto out_disable_clk_x;
denali->clk_rate = clk_get_rate(dt->clk);
denali->clk_x_rate = clk_get_rate(dt->clk_x);
ret = denali_init(denali);
if (ret)
goto out_disable_clk_ecc;
for_each_child_of_node(dev->of_node, np) {
ret = denali_dt_chip_init(denali, np);
if (ret) {
of_node_put(np);
goto out_remove_denali;
}
}
platform_set_drvdata(pdev, dt);
return 0;
out_remove_denali:
denali_remove(denali);
out_disable_clk_ecc:
clk_disable_unprepare(dt->clk_ecc);
out_disable_clk_x:
clk_disable_unprepare(dt->clk_x);
out_disable_clk:
clk_disable_unprepare(dt->clk);
return ret;
}
static int denali_dt_remove(struct platform_device *pdev)
{
struct denali_dt *dt = platform_get_drvdata(pdev);
denali_remove(&dt->controller);
clk_disable_unprepare(dt->clk_ecc);
clk_disable_unprepare(dt->clk_x);
clk_disable_unprepare(dt->clk);
return 0;
}
static struct platform_driver denali_dt_driver = {
.probe = denali_dt_probe,
.remove = denali_dt_remove,
.driver = {
.name = "denali-nand-dt",
.of_match_table = denali_nand_dt_ids,
},
};
module_platform_driver(denali_dt_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Jamie Iles");
MODULE_DESCRIPTION("DT driver for Denali NAND controller");
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