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/* Blackfin NAND Flash Memory Controller (NFC) model
Copyright (C) 2010-2013 Free Software Foundation, Inc.
Contributed by Analog Devices, Inc.
This file is part of simulators.
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 3 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/>. */
#include "config.h"
#include "sim-main.h"
#include "devices.h"
#include "dv-bfin_nfc.h"
/* XXX: This is merely a stub. */
struct bfin_nfc
{
/* This top portion matches common dv_bfin struct. */
bu32 base;
struct hw *dma_master;
bool acked;
struct hw_event *handler;
char saved_byte;
int saved_count;
/* Order after here is important -- matches hardware MMR layout. */
bu16 BFIN_MMR_16(ctl);
bu16 BFIN_MMR_16(stat);
bu16 BFIN_MMR_16(irqstat);
bu16 BFIN_MMR_16(irqmask);
bu16 BFIN_MMR_16(ecc0);
bu16 BFIN_MMR_16(ecc1);
bu16 BFIN_MMR_16(ecc2);
bu16 BFIN_MMR_16(ecc3);
bu16 BFIN_MMR_16(count);
bu16 BFIN_MMR_16(rst);
bu16 BFIN_MMR_16(pgctl);
bu16 BFIN_MMR_16(read);
bu32 _pad0[4];
bu16 BFIN_MMR_16(addr);
bu16 BFIN_MMR_16(cmd);
bu16 BFIN_MMR_16(data_wr);
bu16 BFIN_MMR_16(data_rd);
};
#define mmr_base() offsetof(struct bfin_nfc, ctl)
#define mmr_offset(mmr) (offsetof(struct bfin_nfc, mmr) - mmr_base())
#define mmr_idx(mmr) (mmr_offset (mmr) / 4)
static const char * const mmr_names[] =
{
"NFC_CTL", "NFC_STAT", "NFC_IRQSTAT", "NFC_IRQMASK", "NFC_ECC0", "NFC_ECC1",
"NFC_ECC2", "NFC_ECC3", "NFC_COUNT", "NFC_RST", "NFC_PGCTL", "NFC_READ",
[mmr_idx (addr)] = "NFC_ADDR", "NFC_CMD", "NFC_DATA_WR", "NFC_DATA_RD",
};
#define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>")
static unsigned
bfin_nfc_io_write_buffer (struct hw *me, const void *source, int space,
address_word addr, unsigned nr_bytes)
{
struct bfin_nfc *nfc = hw_data (me);
bu32 mmr_off;
bu32 value;
bu16 *valuep;
value = dv_load_2 (source);
mmr_off = addr - nfc->base;
valuep = (void *)((unsigned long)nfc + mmr_base() + mmr_off);
HW_TRACE_WRITE ();
dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
switch (mmr_off)
{
case mmr_offset(ctl):
case mmr_offset(stat):
case mmr_offset(irqmask):
case mmr_offset(ecc0):
case mmr_offset(ecc1):
case mmr_offset(ecc2):
case mmr_offset(ecc3):
case mmr_offset(count):
case mmr_offset(rst):
case mmr_offset(pgctl):
case mmr_offset(read):
case mmr_offset(addr):
case mmr_offset(cmd):
case mmr_offset(data_wr):
*valuep = value;
break;
case mmr_offset(data_rd):
nfc->irqstat |= RD_RDY;
*valuep = value;
break;
case mmr_offset(irqstat):
dv_w1c_2 (valuep, value, -1);
break;
default:
dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
break;
}
return nr_bytes;
}
static unsigned
bfin_nfc_io_read_buffer (struct hw *me, void *dest, int space,
address_word addr, unsigned nr_bytes)
{
struct bfin_nfc *nfc = hw_data (me);
bu32 mmr_off;
bu16 *valuep;
mmr_off = addr - nfc->base;
valuep = (void *)((unsigned long)nfc + mmr_base() + mmr_off);
HW_TRACE_READ ();
dv_bfin_mmr_require_16 (me, addr, nr_bytes, false);
switch (mmr_off)
{
case mmr_offset(ctl):
case mmr_offset(stat):
case mmr_offset(irqstat):
case mmr_offset(irqmask):
case mmr_offset(ecc0):
case mmr_offset(ecc1):
case mmr_offset(ecc2):
case mmr_offset(ecc3):
case mmr_offset(count):
case mmr_offset(rst):
case mmr_offset(read):
dv_store_2 (dest, *valuep);
break;
case mmr_offset(pgctl):
case mmr_offset(addr):
case mmr_offset(cmd):
case mmr_offset(data_wr):
case mmr_offset(data_rd):
/* These regs are write only. */
default:
dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
break;
}
return nr_bytes;
}
static unsigned
bfin_nfc_dma_read_buffer (struct hw *me, void *dest, int space,
unsigned_word addr, unsigned nr_bytes)
{
HW_TRACE_DMA_READ ();
return 0;
}
static unsigned
bfin_nfc_dma_write_buffer (struct hw *me, const void *source,
int space, unsigned_word addr,
unsigned nr_bytes,
int violate_read_only_section)
{
HW_TRACE_DMA_WRITE ();
return nr_bytes;
}
static const struct hw_port_descriptor bfin_nfc_ports[] =
{
{ "stat", 0, 0, output_port, },
{ NULL, 0, 0, 0, },
};
static void
attach_bfin_nfc_regs (struct hw *me, struct bfin_nfc *nfc)
{
address_word attach_address;
int attach_space;
unsigned attach_size;
reg_property_spec reg;
if (hw_find_property (me, "reg") == NULL)
hw_abort (me, "Missing \"reg\" property");
if (!hw_find_reg_array_property (me, "reg", 0, ®))
hw_abort (me, "\"reg\" property must contain three addr/size entries");
hw_unit_address_to_attach_address (hw_parent (me),
®.address,
&attach_space, &attach_address, me);
hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me);
if (attach_size != BFIN_MMR_NFC_SIZE)
hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_NFC_SIZE);
hw_attach_address (hw_parent (me),
0, attach_space, attach_address, attach_size, me);
nfc->base = attach_address;
}
static void
bfin_nfc_finish (struct hw *me)
{
struct bfin_nfc *nfc;
nfc = HW_ZALLOC (me, struct bfin_nfc);
set_hw_data (me, nfc);
set_hw_io_read_buffer (me, bfin_nfc_io_read_buffer);
set_hw_io_write_buffer (me, bfin_nfc_io_write_buffer);
set_hw_dma_read_buffer (me, bfin_nfc_dma_read_buffer);
set_hw_dma_write_buffer (me, bfin_nfc_dma_write_buffer);
set_hw_ports (me, bfin_nfc_ports);
attach_bfin_nfc_regs (me, nfc);
/* Initialize the NFC. */
nfc->ctl = 0x0200;
nfc->stat = 0x0011;
nfc->irqstat = 0x0004;
nfc->irqmask = 0x001F;
}
const struct hw_descriptor dv_bfin_nfc_descriptor[] =
{
{"bfin_nfc", bfin_nfc_finish,},
{NULL, NULL},
};
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