src/flash/nand/orion.c

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Marvell Semiconductors, Inc.                    *
   3  *   Written by Nicolas Pitre <nico at marvell.com>                           *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 /*
  22  * NAND controller interface for Marvell Orion/Kirkwood SoCs.
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #include "imp.h"
  30 #include "arm_io.h"
  31 #include <target/arm.h>
  32
  33
  34 struct orion_nand_controller
  35 {
  36         struct arm_nand_data    io;
  37
  38         uint32_t                cmd;
  39         uint32_t                addr;
  40         uint32_t                data;
  41 };
  42
  43 #define CHECK_HALTED \
  44         do { \
  45                 if (target->state != TARGET_HALTED) { \
  46                         LOG_ERROR("NAND flash access requires halted target"); \
  47                         return ERROR_NAND_OPERATION_FAILED; \
  48                 } \
  49         } while (0)
  50
  51 static int orion_nand_command(struct nand_device *nand, uint8_t command)
  52 {
  53         struct orion_nand_controller *hw = nand->controller_priv;
  54         struct target *target = nand->target;
  55
  56         CHECK_HALTED;
  57         target_write_u8(target, hw->cmd, command);
  58         return ERROR_OK;
  59 }
  60
  61 static int orion_nand_address(struct nand_device *nand, uint8_t address)
  62 {
  63         struct orion_nand_controller *hw = nand->controller_priv;
  64         struct target *target = nand->target;
  65
  66         CHECK_HALTED;
  67         target_write_u8(target, hw->addr, address);
  68         return ERROR_OK;
  69 }
  70
  71 static int orion_nand_read(struct nand_device *nand, void *data)
  72 {
  73         struct orion_nand_controller *hw = nand->controller_priv;
  74         struct target *target = nand->target;
  75
  76         CHECK_HALTED;
  77         target_read_u8(target, hw->data, data);
  78         return ERROR_OK;
  79 }
  80
  81 static int orion_nand_write(struct nand_device *nand, uint16_t data)
  82 {
  83         struct orion_nand_controller *hw = nand->controller_priv;
  84         struct target *target = nand->target;
  85
  86         CHECK_HALTED;
  87         target_write_u8(target, hw->data, data);
  88         return ERROR_OK;
  89 }
  90
  91 static int orion_nand_slow_block_write(struct nand_device *nand, uint8_t *data, int size)
  92 {
  93         while (size--)
  94                 orion_nand_write(nand, *data++);
  95         return ERROR_OK;
  96 }
  97
  98 static int orion_nand_fast_block_write(struct nand_device *nand, uint8_t *data, int size)
  99 {
 100         struct orion_nand_controller *hw = nand->controller_priv;
 101         int retval;
 102
 103         hw->io.chunk_size = nand->page_size;
 104
 105         retval = arm_nandwrite(&hw->io, data, size);
 106         if (retval == ERROR_NAND_NO_BUFFER)
 107                 retval = orion_nand_slow_block_write(nand, data, size);
 108
 109         return retval;
 110 }
 111
 112 static int orion_nand_reset(struct nand_device *nand)
 113 {
 114         return orion_nand_command(nand, NAND_CMD_RESET);
 115 }
 116
 117 NAND_DEVICE_COMMAND_HANDLER(orion_nand_device_command)
 118 {
 119         struct orion_nand_controller *hw;
 120         uint32_t base;
 121         uint8_t ale, cle;
 122
 123         if (CMD_ARGC != 3) {
 124                 LOG_ERROR("arguments must be: <target_id> <NAND_address>");
 125                 return ERROR_NAND_DEVICE_INVALID;
 126         }
 127
 128         hw = calloc(1, sizeof(*hw));
 129         if (!hw) {
 130                 LOG_ERROR("no memory for nand controller");
 131                 return ERROR_NAND_DEVICE_INVALID;
 132         }
 133
 134         nand->controller_priv = hw;
 135
 136         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], base);
 137         cle = 0;
 138         ale = 1;
 139
 140         hw->data = base;
 141         hw->cmd = base + (1 << cle);
 142         hw->addr = base + (1 << ale);
 143
 144         hw->io.target = nand->target;
 145         hw->io.data = hw->data;
 146         hw->io.op = ARM_NAND_NONE;
 147
 148         return ERROR_OK;
 149 }
 150
 151 static int orion_nand_init(struct nand_device *nand)
 152 {
 153         return ERROR_OK;
 154 }
 155
 156 struct nand_flash_controller orion_nand_controller =
 157 {
 158         .name                   = "orion",
 159         .command                = orion_nand_command,
 160         .address                = orion_nand_address,
 161         .read_data              = orion_nand_read,
 162         .write_data             = orion_nand_write,
 163         .write_block_data       = orion_nand_fast_block_write,
 164         .reset                  = orion_nand_reset,
 165         .nand_device_command    = orion_nand_device_command,
 166         .init                   = orion_nand_init,
 167 };
 168