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 <clk.h>
   9 #include <dm.h>
  10 #include <linux/io.h>
  11 #include <linux/ioport.h>
  12 #include <linux/printk.h>
  13
  14 #include "denali.h"
  15
  16 struct denali_dt_data {
  17         unsigned int revision;
  18         unsigned int caps;
  19         const struct nand_ecc_caps *ecc_caps;
  20 };
  21
  22 NAND_ECC_CAPS_SINGLE(denali_socfpga_ecc_caps, denali_calc_ecc_bytes,
  23                      512, 8, 15);
  24 static const struct denali_dt_data denali_socfpga_data = {
  25         .caps = DENALI_CAP_HW_ECC_FIXUP,
  26         .ecc_caps = &denali_socfpga_ecc_caps,
  27 };
  28
  29 NAND_ECC_CAPS_SINGLE(denali_uniphier_v5a_ecc_caps, denali_calc_ecc_bytes,
  30                      1024, 8, 16, 24);
  31 static const struct denali_dt_data denali_uniphier_v5a_data = {
  32         .caps = DENALI_CAP_HW_ECC_FIXUP |
  33                 DENALI_CAP_DMA_64BIT,
  34         .ecc_caps = &denali_uniphier_v5a_ecc_caps,
  35 };
  36
  37 NAND_ECC_CAPS_SINGLE(denali_uniphier_v5b_ecc_caps, denali_calc_ecc_bytes,
  38                      1024, 8, 16);
  39 static const struct denali_dt_data denali_uniphier_v5b_data = {
  40         .revision = 0x0501,
  41         .caps = DENALI_CAP_HW_ECC_FIXUP |
  42                 DENALI_CAP_DMA_64BIT,
  43         .ecc_caps = &denali_uniphier_v5b_ecc_caps,
  44 };
  45
  46 static const struct udevice_id denali_nand_dt_ids[] = {
  47         {
  48                 .compatible = "altr,socfpga-denali-nand",
  49                 .data = (unsigned long)&denali_socfpga_data,
  50         },
  51         {
  52                 .compatible = "socionext,uniphier-denali-nand-v5a",
  53                 .data = (unsigned long)&denali_uniphier_v5a_data,
  54         },
  55         {
  56                 .compatible = "socionext,uniphier-denali-nand-v5b",
  57                 .data = (unsigned long)&denali_uniphier_v5b_data,
  58         },
  59         { /* sentinel */ }
  60 };
  61
  62 static int denali_dt_probe(struct udevice *dev)
  63 {
  64         struct denali_nand_info *denali = dev_get_priv(dev);
  65         const struct denali_dt_data *data;
  66         struct clk clk;
  67         struct resource res;
  68         int ret;
  69
  70         data = (void *)dev_get_driver_data(dev);
  71         if (data) {
  72                 denali->revision = data->revision;
  73                 denali->caps = data->caps;
  74                 denali->ecc_caps = data->ecc_caps;
  75         }
  76
  77         denali->dev = dev;
  78
  79         ret = dev_read_resource_byname(dev, "denali_reg", &res);
  80         if (ret)
  81                 return ret;
  82
  83         denali->reg = devm_ioremap(dev, res.start, resource_size(&res));
  84
  85         ret = dev_read_resource_byname(dev, "nand_data", &res);
  86         if (ret)
  87                 return ret;
  88
  89         denali->host = devm_ioremap(dev, res.start, resource_size(&res));
  90
  91         ret = clk_get_by_index(dev, 0, &clk);
  92         if (ret)
  93                 return ret;
  94
  95         ret = clk_enable(&clk);
  96         if (ret)
  97                 return ret;
  98
  99         denali->clk_x_rate = clk_get_rate(&clk);
 100
 101         return denali_init(denali);
 102 }
 103
 104 U_BOOT_DRIVER(denali_nand_dt) = {
 105         .name = "denali-nand-dt",
 106         .id = UCLASS_MISC,
 107         .of_match = denali_nand_dt_ids,
 108         .probe = denali_dt_probe,
 109         .priv_auto_alloc_size = sizeof(struct denali_nand_info),
 110 };
 111
 112 void board_nand_init(void)
 113 {
 114         struct udevice *dev;
 115         int ret;
 116
 117         ret = uclass_get_device_by_driver(UCLASS_MISC,
 118                                           DM_GET_DRIVER(denali_nand_dt),
 119                                           &dev);
 120         if (ret && ret != -ENODEV)
 121                 pr_err("Failed to initialize Denali NAND controller. (error %d)\n",
 122                        ret);
 123 }