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/*
* NXP GPMI NAND flash driver (DT initialization)
*
* Copyright (C) 2018 Toradex
* Copyright 2019 NXP
*
* Authors:
* Stefan Agner <stefan.agner@toradex.com>
*
* Based on denali_dt.c
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <dm.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/printk.h>
#include <clk.h>
#include <mxs_nand.h>
struct mxs_nand_dt_data {
unsigned int max_ecc_strength_supported;
};
static const struct mxs_nand_dt_data mxs_nand_imx6q_data = {
.max_ecc_strength_supported = 40,
};
static const struct mxs_nand_dt_data mxs_nand_imx6sx_data = {
.max_ecc_strength_supported = 62,
};
static const struct mxs_nand_dt_data mxs_nand_imx7d_data = {
.max_ecc_strength_supported = 62,
};
static const struct mxs_nand_dt_data mxs_nand_imx8qxp_data = {
.max_ecc_strength_supported = 62,
};
static const struct udevice_id mxs_nand_dt_ids[] = {
{
.compatible = "fsl,imx6q-gpmi-nand",
.data = (unsigned long)&mxs_nand_imx6q_data,
},
{
.compatible = "fsl,imx6qp-gpmi-nand",
.data = (unsigned long)&mxs_nand_imx6q_data,
},
{
.compatible = "fsl,imx6sx-gpmi-nand",
.data = (unsigned long)&mxs_nand_imx6sx_data,
},
{
.compatible = "fsl,imx7d-gpmi-nand",
.data = (unsigned long)&mxs_nand_imx7d_data,
},
{
.compatible = "fsl,imx8qxp-gpmi-nand",
.data = (unsigned long)&mxs_nand_imx8qxp_data,
},
{ /* sentinel */ }
};
static int mxs_nand_dt_probe(struct udevice *dev)
{
struct mxs_nand_info *info = dev_get_priv(dev);
const struct mxs_nand_dt_data *data;
struct resource res;
int ret;
data = (void *)dev_get_driver_data(dev);
if (data)
info->max_ecc_strength_supported = data->max_ecc_strength_supported;
info->dev = dev;
ret = dev_read_resource_byname(dev, "gpmi-nand", &res);
if (ret)
return ret;
info->gpmi_regs = devm_ioremap(dev, res.start, resource_size(&res));
ret = dev_read_resource_byname(dev, "bch", &res);
if (ret)
return ret;
info->bch_regs = devm_ioremap(dev, res.start, resource_size(&res));
info->use_minimum_ecc = dev_read_bool(dev, "fsl,use-minimum-ecc");
info->legacy_bch_geometry = dev_read_bool(dev, "fsl,legacy-bch-geometry");
if (IS_ENABLED(CONFIG_CLK) && IS_ENABLED(CONFIG_IMX8)) {
/* Assigned clock already set clock */
struct clk gpmi_clk;
ret = clk_get_by_name(dev, "gpmi_io", &gpmi_clk);
if (ret < 0) {
debug("Can't get gpmi io clk: %d\n", ret);
return ret;
}
ret = clk_enable(&gpmi_clk);
if (ret < 0) {
debug("Can't enable gpmi io clk: %d\n", ret);
return ret;
}
ret = clk_get_by_name(dev, "gpmi_apb", &gpmi_clk);
if (ret < 0) {
debug("Can't get gpmi_apb clk: %d\n", ret);
return ret;
}
ret = clk_enable(&gpmi_clk);
if (ret < 0) {
debug("Can't enable gpmi_apb clk: %d\n", ret);
return ret;
}
ret = clk_get_by_name(dev, "gpmi_bch", &gpmi_clk);
if (ret < 0) {
debug("Can't get gpmi_bch clk: %d\n", ret);
return ret;
}
ret = clk_enable(&gpmi_clk);
if (ret < 0) {
debug("Can't enable gpmi_bch clk: %d\n", ret);
return ret;
}
ret = clk_get_by_name(dev, "gpmi_apb_bch", &gpmi_clk);
if (ret < 0) {
debug("Can't get gpmi_apb_bch clk: %d\n", ret);
return ret;
}
ret = clk_enable(&gpmi_clk);
if (ret < 0) {
debug("Can't enable gpmi_apb_bch clk: %d\n", ret);
return ret;
}
/* this clock is used for apbh_dma, since the apbh dma does not support DM,
* we optionally enable it here
*/
ret = clk_get_by_name(dev, "gpmi_apbh_dma", &gpmi_clk);
if (ret < 0) {
debug("Can't get gpmi_apbh_dma clk: %d\n", ret);
} else {
ret = clk_enable(&gpmi_clk);
if (ret < 0) {
debug("Can't enable gpmi_apbh_dma clk: %d\n", ret);
}
}
}
return mxs_nand_init_ctrl(info);
}
U_BOOT_DRIVER(mxs_nand_dt) = {
.name = "mxs-nand-dt",
.id = UCLASS_MTD,
.of_match = mxs_nand_dt_ids,
.probe = mxs_nand_dt_probe,
.priv_auto = sizeof(struct mxs_nand_info),
};
void board_nand_init(void)
{
struct udevice *dev;
int ret;
ret = uclass_get_device_by_driver(UCLASS_MTD,
DM_GET_DRIVER(mxs_nand_dt),
&dev);
if (ret && ret != -ENODEV)
pr_err("Failed to initialize MXS NAND controller. (error %d)\n",
ret);
}
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