drivers/mtd/nand/denali_dt.c

   1 /*
   2  * Copyright (C) 2017 Socionext Inc.
   3  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <clk.h>
  10 #include <dm.h>
  11 #include <linux/io.h>
  12 #include <linux/ioport.h>
  13
  14 #include "denali.h"
  15
  16 struct denali_dt_data {
  17         unsigned int revision;
  18         unsigned int caps;
  19 };
  20
  21 static const struct denali_dt_data denali_socfpga_data = {
  22         .caps = DENALI_CAP_HW_ECC_FIXUP,
  23 };
  24
  25 static const struct denali_dt_data denali_uniphier_v5a_data = {
  26         .caps = DENALI_CAP_HW_ECC_FIXUP |
  27                 DENALI_CAP_DMA_64BIT,
  28 };
  29
  30 static const struct denali_dt_data denali_uniphier_v5b_data = {
  31         .revision = 0x0501,
  32         .caps = DENALI_CAP_HW_ECC_FIXUP |
  33                 DENALI_CAP_DMA_64BIT,
  34 };
  35
  36 static const struct udevice_id denali_nand_dt_ids[] = {
  37         {
  38                 .compatible = "altr,socfpga-denali-nand",
  39                 .data = (unsigned long)&denali_socfpga_data,
  40         },
  41         {
  42                 .compatible = "socionext,uniphier-denali-nand-v5a",
  43                 .data = (unsigned long)&denali_uniphier_v5a_data,
  44         },
  45         {
  46                 .compatible = "socionext,uniphier-denali-nand-v5b",
  47                 .data = (unsigned long)&denali_uniphier_v5b_data,
  48         },
  49         { /* sentinel */ }
  50 };
  51
  52 static int denali_dt_probe(struct udevice *dev)
  53 {
  54         struct denali_nand_info *denali = dev_get_priv(dev);
  55         const struct denali_dt_data *data;
  56         struct clk clk;
  57         struct resource res;
  58         int ret;
  59
  60         data = (void *)dev_get_driver_data(dev);
  61         if (data) {
  62                 denali->revision = data->revision;
  63                 denali->caps = data->caps;
  64         }
  65
  66         ret = dev_read_resource_byname(dev, "denali_reg", &res);
  67         if (ret)
  68                 return ret;
  69
  70         denali->flash_reg = devm_ioremap(dev, res.start, resource_size(&res));
  71
  72         ret = dev_read_resource_byname(dev, "nand_data", &res);
  73         if (ret)
  74                 return ret;
  75
  76         denali->flash_mem = devm_ioremap(dev, res.start, resource_size(&res));
  77
  78         ret = clk_get_by_index(dev, 0, &clk);
  79         if (ret)
  80                 return ret;
  81
  82         ret = clk_enable(&clk);
  83         if (ret)
  84                 return ret;
  85
  86         denali->clk_x_rate = clk_get_rate(&clk);
  87
  88         return denali_init(denali);
  89 }
  90
  91 U_BOOT_DRIVER(denali_nand_dt) = {
  92         .name = "denali-nand-dt",
  93         .id = UCLASS_MISC,
  94         .of_match = denali_nand_dt_ids,
  95         .probe = denali_dt_probe,
  96         .priv_auto_alloc_size = sizeof(struct denali_nand_info),
  97 };
  98
  99 void board_nand_init(void)
 100 {
 101         struct udevice *dev;
 102         int ret;
 103
 104         ret = uclass_get_device_by_driver(UCLASS_MISC,
 105                                           DM_GET_DRIVER(denali_nand_dt),
 106                                           &dev);
 107         if (ret && ret != -ENODEV)
 108                 printf("Failed to initialize Denali NAND controller. (error %d)\n",
 109                        ret);
 110 }