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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#include <clk.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <linux/bug.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/printk.h>
#include <reset.h>
#include "denali.h"
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 udevice_id denali_nand_dt_ids[] = {
{
.compatible = "altr,socfpga-denali-nand",
.data = (unsigned long)&denali_socfpga_data,
},
{
.compatible = "socionext,uniphier-denali-nand-v5a",
.data = (unsigned long)&denali_uniphier_v5a_data,
},
{
.compatible = "socionext,uniphier-denali-nand-v5b",
.data = (unsigned long)&denali_uniphier_v5b_data,
},
{ /* sentinel */ }
};
static int denali_dt_probe(struct udevice *dev)
{
struct denali_nand_info *denali = dev_get_priv(dev);
const struct denali_dt_data *data;
struct clk clk, clk_x, clk_ecc;
struct reset_ctl_bulk resets;
struct resource res;
int ret;
data = (void *)dev_get_driver_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;
ret = dev_read_resource_byname(dev, "denali_reg", &res);
if (ret)
return ret;
denali->reg = devm_ioremap(dev, res.start, resource_size(&res));
ret = dev_read_resource_byname(dev, "nand_data", &res);
if (ret)
return ret;
denali->host = devm_ioremap(dev, res.start, resource_size(&res));
ret = clk_get_by_name(dev, "nand", &clk);
if (ret)
ret = clk_get_by_index(dev, 0, &clk);
if (ret)
clk.dev = NULL;
ret = clk_get_by_name(dev, "nand_x", &clk_x);
if (ret)
clk_x.dev = NULL;
ret = clk_get_by_name(dev, "ecc", &clk_ecc);
if (ret)
clk_ecc.dev = NULL;
if (clk.dev) {
ret = clk_enable(&clk);
if (ret)
return ret;
}
if (clk_x.dev) {
ret = clk_enable(&clk_x);
if (ret)
return ret;
}
if (clk_ecc.dev) {
ret = clk_enable(&clk_ecc);
if (ret)
return ret;
}
if (clk_x.dev) {
denali->clk_rate = clk_get_rate(&clk);
denali->clk_x_rate = clk_get_rate(&clk_x);
} else {
/*
* Hardcode the clock rates for the backward compatibility.
* This works for both SOCFPGA and UniPhier.
*/
dev_notice(dev,
"necessary clock is missing. default clock rates are used.\n");
denali->clk_rate = 50000000;
denali->clk_x_rate = 200000000;
}
ret = reset_get_bulk(dev, &resets);
if (ret) {
dev_warn(dev, "Can't get reset: %d\n", ret);
} else {
reset_assert_bulk(&resets);
udelay(2);
reset_deassert_bulk(&resets);
/*
* When the reset is deasserted, the initialization sequence is
* kicked (bootstrap process). The driver must wait until it is
* finished. Otherwise, it will result in unpredictable behavior.
*/
ret = denali_wait_reset_complete(denali);
if (ret) {
dev_err(denali->dev, "reset not completed.\n");
return ret;
}
}
return denali_init(denali);
}
U_BOOT_DRIVER(denali_nand_dt) = {
.name = "denali-nand-dt",
.id = UCLASS_MTD,
.of_match = denali_nand_dt_ids,
.probe = denali_dt_probe,
.priv_auto = sizeof(struct denali_nand_info),
};
void board_nand_init(void)
{
struct udevice *dev;
int ret;
ret = uclass_get_device_by_driver(UCLASS_MTD,
DM_GET_DRIVER(denali_nand_dt),
&dev);
if (ret && ret != -ENODEV)
pr_err("Failed to initialize Denali NAND controller. (error %d)\n",
ret);
}
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