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/***************************************************************************
* Copyright (C) 2010 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
/*
* NAND controller interface for Nuvoton NUC910
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "imp.h"
#include "nuc910.h"
#include "arm_io.h"
#include <target/arm.h>
struct nuc910_nand_controller {
struct arm_nand_data io;
};
static int validate_target_state(struct nand_device *nand)
{
struct target *target = nand->target;
if (target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_NAND_OPERATION_FAILED;
}
return ERROR_OK;
}
static int nuc910_nand_command(struct nand_device *nand, uint8_t command)
{
struct target *target = nand->target;
int result;
result = validate_target_state(nand);
if (result != ERROR_OK)
return result;
target_write_u8(target, NUC910_SMCMD, command);
return ERROR_OK;
}
static int nuc910_nand_address(struct nand_device *nand, uint8_t address)
{
struct target *target = nand->target;
int result;
result = validate_target_state(nand);
if (result != ERROR_OK)
return result;
target_write_u32(target, NUC910_SMADDR, ((address & 0xff) | NUC910_SMADDR_EOA));
return ERROR_OK;
}
static int nuc910_nand_read(struct nand_device *nand, void *data)
{
struct target *target = nand->target;
int result;
result = validate_target_state(nand);
if (result != ERROR_OK)
return result;
target_read_u8(target, NUC910_SMDATA, data);
return ERROR_OK;
}
static int nuc910_nand_write(struct nand_device *nand, uint16_t data)
{
struct target *target = nand->target;
int result;
result = validate_target_state(nand);
if (result != ERROR_OK)
return result;
target_write_u8(target, NUC910_SMDATA, data);
return ERROR_OK;
}
static int nuc910_nand_read_block_data(struct nand_device *nand,
uint8_t *data, int data_size)
{
struct nuc910_nand_controller *nuc910_nand = nand->controller_priv;
int result;
result = validate_target_state(nand);
if (result != ERROR_OK)
return result;
nuc910_nand->io.chunk_size = nand->page_size;
/* try the fast way first */
result = arm_nandread(&nuc910_nand->io, data, data_size);
if (result != ERROR_NAND_NO_BUFFER)
return result;
/* else do it slowly */
while (data_size--)
nuc910_nand_read(nand, data++);
return ERROR_OK;
}
static int nuc910_nand_write_block_data(struct nand_device *nand,
uint8_t *data, int data_size)
{
struct nuc910_nand_controller *nuc910_nand = nand->controller_priv;
int result;
result = validate_target_state(nand);
if (result != ERROR_OK)
return result;
nuc910_nand->io.chunk_size = nand->page_size;
/* try the fast way first */
result = arm_nandwrite(&nuc910_nand->io, data, data_size);
if (result != ERROR_NAND_NO_BUFFER)
return result;
/* else do it slowly */
while (data_size--)
nuc910_nand_write(nand, *data++);
return ERROR_OK;
}
static int nuc910_nand_reset(struct nand_device *nand)
{
return nuc910_nand_command(nand, NAND_CMD_RESET);
}
static int nuc910_nand_ready(struct nand_device *nand, int timeout)
{
struct target *target = nand->target;
uint32_t status;
do {
target_read_u32(target, NUC910_SMISR, &status);
if (status & NUC910_SMISR_RB_)
return 1;
alive_sleep(1);
} while (timeout-- > 0);
return 0;
}
NAND_DEVICE_COMMAND_HANDLER(nuc910_nand_device_command)
{
struct nuc910_nand_controller *nuc910_nand;
nuc910_nand = calloc(1, sizeof(struct nuc910_nand_controller));
if (!nuc910_nand) {
LOG_ERROR("no memory for nand controller");
return ERROR_NAND_DEVICE_INVALID;
}
nand->controller_priv = nuc910_nand;
return ERROR_OK;
}
static int nuc910_nand_init(struct nand_device *nand)
{
struct nuc910_nand_controller *nuc910_nand = nand->controller_priv;
struct target *target = nand->target;
int bus_width = nand->bus_width ? : 8;
int result;
result = validate_target_state(nand);
if (result != ERROR_OK)
return result;
/* nuc910 only supports 8bit */
if (bus_width != 8) {
LOG_ERROR("nuc910 only supports 8 bit bus width, not %i", bus_width);
return ERROR_NAND_OPERATION_NOT_SUPPORTED;
}
/* inform calling code about selected bus width */
nand->bus_width = bus_width;
nuc910_nand->io.target = target;
nuc910_nand->io.data = NUC910_SMDATA;
nuc910_nand->io.op = ARM_NAND_NONE;
/* configure nand controller */
target_write_u32(target, NUC910_FMICSR, NUC910_FMICSR_SM_EN);
target_write_u32(target, NUC910_SMCSR, 0x010000a8); /* 2048 page size */
target_write_u32(target, NUC910_SMTCR, 0x00010204);
target_write_u32(target, NUC910_SMIER, 0x00000000);
return ERROR_OK;
}
struct nand_flash_controller nuc910_nand_controller = {
.name = "nuc910",
.command = nuc910_nand_command,
.address = nuc910_nand_address,
.read_data = nuc910_nand_read,
.write_data = nuc910_nand_write,
.write_block_data = nuc910_nand_write_block_data,
.read_block_data = nuc910_nand_read_block_data,
.nand_ready = nuc910_nand_ready,
.reset = nuc910_nand_reset,
.nand_device_command = nuc910_nand_device_command,
.init = nuc910_nand_init,
};
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