drivers/mtd/nand/raw/mxs_nand_dt.c

   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
  20 struct mxs_nand_dt_data {
  21         unsigned int max_ecc_strength_supported;
  22 };
  23
  24 static const struct mxs_nand_dt_data mxs_nand_imx6q_data = {
  25         .max_ecc_strength_supported = 40,
  26 };
  27
  28 static const struct mxs_nand_dt_data mxs_nand_imx6sx_data = {
  29         .max_ecc_strength_supported = 62,
  30 };
  31
  32 static const struct mxs_nand_dt_data mxs_nand_imx7d_data = {
  33         .max_ecc_strength_supported = 62,
  34 };
  35
  36 static const struct mxs_nand_dt_data mxs_nand_imx8qxp_data = {
  37         .max_ecc_strength_supported = 62,
  38 };
  39
  40 static const struct udevice_id mxs_nand_dt_ids[] = {
  41         {
  42                 .compatible = "fsl,imx6q-gpmi-nand",
  43                 .data = (unsigned long)&mxs_nand_imx6q_data,
  44         },
  45         {
  46                 .compatible = "fsl,imx6qp-gpmi-nand",
  47                 .data = (unsigned long)&mxs_nand_imx6q_data,
  48         },
  49         {
  50                 .compatible = "fsl,imx6sx-gpmi-nand",
  51                 .data = (unsigned long)&mxs_nand_imx6sx_data,
  52         },
  53         {
  54                 .compatible = "fsl,imx7d-gpmi-nand",
  55                 .data = (unsigned long)&mxs_nand_imx7d_data,
  56         },
  57         {
  58                 .compatible = "fsl,imx8qxp-gpmi-nand",
  59                 .data = (unsigned long)&mxs_nand_imx8qxp_data,
  60         },
  61         { /* sentinel */ }
  62 };
  63
  64 static int mxs_nand_dt_probe(struct udevice *dev)
  65 {
  66         struct mxs_nand_info *info = dev_get_priv(dev);
  67         const struct mxs_nand_dt_data *data;
  68         struct resource res;
  69         int ret;
  70
  71         data = (void *)dev_get_driver_data(dev);
  72         if (data)
  73                 info->max_ecc_strength_supported = data->max_ecc_strength_supported;
  74
  75         info->dev = dev;
  76
  77         ret = dev_read_resource_byname(dev, "gpmi-nand", &res);
  78         if (ret)
  79                 return ret;
  80
  81         info->gpmi_regs = devm_ioremap(dev, res.start, resource_size(&res));
  82
  83
  84         ret = dev_read_resource_byname(dev, "bch", &res);
  85         if (ret)
  86                 return ret;
  87
  88         info->bch_regs = devm_ioremap(dev, res.start, resource_size(&res));
  89
  90         info->use_minimum_ecc = dev_read_bool(dev, "fsl,use-minimum-ecc");
  91
  92         info->legacy_bch_geometry = dev_read_bool(dev, "fsl,legacy-bch-geometry");
  93
  94         return mxs_nand_init_ctrl(info);
  95 }
  96
  97 U_BOOT_DRIVER(mxs_nand_dt) = {
  98         .name = "mxs-nand-dt",
  99         .id = UCLASS_MTD,
 100         .of_match = mxs_nand_dt_ids,
 101         .probe = mxs_nand_dt_probe,
 102         .priv_auto_alloc_size = sizeof(struct mxs_nand_info),
 103 };
 104
 105 void board_nand_init(void)
 106 {
 107         struct udevice *dev;
 108         int ret;
 109
 110         ret = uclass_get_device_by_driver(UCLASS_MTD,
 111                                           DM_GET_DRIVER(mxs_nand_dt),
 112                                           &dev);
 113         if (ret && ret != -ENODEV)
 114                 pr_err("Failed to initialize MXS NAND controller. (error %d)\n",
 115                        ret);
 116 }