LXR uboot/drivers/mtd/nand/raw/mxs_nand

   1/*
   2 * NXP GPMI NAND flash driver (DT initialization)
   3 *
   4 * Copyright (C) 2018 Toradex
   5 * Authors:
   6 * Stefan Agner <stefan.agner@toradex.com>
   7 *
   8 * Based on denali_dt.c
   9 *
  10 * SPDX-License-Identifier:     GPL-2.0+
  11 */
  12
  13#include <dm.h>
  14#include <linux/io.h>
  15#include <linux/ioport.h>
  16#include <linux/printk.h>
  17
  18#include <mxs_nand.h>
  19
  20struct mxs_nand_dt_data {
  21        unsigned int max_ecc_strength_supported;
  22};
  23
  24static const struct mxs_nand_dt_data mxs_nand_imx6q_data = {
  25        .max_ecc_strength_supported = 40,
  26};
  27
  28static const struct mxs_nand_dt_data mxs_nand_imx7d_data = {
  29        .max_ecc_strength_supported = 62,
  30};
  31
  32static const struct udevice_id mxs_nand_dt_ids[] = {
  33        {
  34                .compatible = "fsl,imx6q-gpmi-nand",
  35                .data = (unsigned long)&mxs_nand_imx6q_data,
  36        },
  37        {
  38                .compatible = "fsl,imx7d-gpmi-nand",
  39                .data = (unsigned long)&mxs_nand_imx7d_data,
  40        },
  41        { /* sentinel */ }
  42};
  43
  44static int mxs_nand_dt_probe(struct udevice *dev)
  45{
  46        struct mxs_nand_info *info = dev_get_priv(dev);
  47        const struct mxs_nand_dt_data *data;
  48        struct resource res;
  49        int ret;
  50
  51        data = (void *)dev_get_driver_data(dev);
  52        if (data)
  53                info->max_ecc_strength_supported = data->max_ecc_strength_supported;
  54
  55        info->dev = dev;
  56
  57        ret = dev_read_resource_byname(dev, "gpmi-nand", &res);
  58        if (ret)
  59                return ret;
  60
  61        info->gpmi_regs = devm_ioremap(dev, res.start, resource_size(&res));
  62
  63
  64        ret = dev_read_resource_byname(dev, "bch", &res);
  65        if (ret)
  66                return ret;
  67
  68        info->bch_regs = devm_ioremap(dev, res.start, resource_size(&res));
  69
  70        info->use_minimum_ecc = dev_read_bool(dev, "fsl,use-minimum-ecc");
  71
  72        return mxs_nand_init_ctrl(info);
  73}
  74
  75U_BOOT_DRIVER(mxs_nand_dt) = {
  76        .name = "mxs-nand-dt",
  77        .id = UCLASS_MTD,
  78        .of_match = mxs_nand_dt_ids,
  79        .probe = mxs_nand_dt_probe,
  80        .priv_auto_alloc_size = sizeof(struct mxs_nand_info),
  81};
  82
  83void board_nand_init(void)
  84{
  85        struct udevice *dev;
  86        int ret;
  87
  88        ret = uclass_get_device_by_driver(UCLASS_MTD,
  89                                          DM_GET_DRIVER(mxs_nand_dt),
  90                                          &dev);
  91        if (ret && ret != -ENODEV)
  92                pr_err("Failed to initialize MXS NAND controller. (error %d)\n",
  93                       ret);
  94}
  95