binutils-gdb/sim/bfin/dv-bfin_eppi.c

275 lines
7.1 KiB
C

/* Blackfin Enhanced Parallel Port Interface (EPPI) model
For "new style" PPIs on BF54x/etc... parts.
Copyright (C) 2010-2011 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_eppi.h"
#include "gui.h"
/* XXX: TX is merely a stub. */
struct bfin_eppi
{
/* 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;
/* GUI state. */
void *gui_state;
int color;
/* Order after here is important -- matches hardware MMR layout. */
bu16 BFIN_MMR_16(status);
bu16 BFIN_MMR_16(hcount);
bu16 BFIN_MMR_16(hdelay);
bu16 BFIN_MMR_16(vcount);
bu16 BFIN_MMR_16(vdelay);
bu16 BFIN_MMR_16(frame);
bu16 BFIN_MMR_16(line);
bu16 BFIN_MMR_16(clkdiv);
bu32 control, fs1w_hbl, fs1p_avpl, fsw2_lvb, fs2p_lavf, clip, err;
};
#define mmr_base() offsetof(struct bfin_eppi, status)
#define mmr_offset(mmr) (offsetof(struct bfin_eppi, mmr) - mmr_base())
static const char * const mmr_names[] =
{
"EPPI_STATUS", "EPPI_HCOUNT", "EPPI_HDELAY", "EPPI_VCOUNT", "EPPI_VDELAY",
"EPPI_FRAME", "EPPI_LINE", "EPPI_CLKDIV", "EPPI_CONTROL", "EPPI_FS1W_HBL",
"EPPI_FS1P_AVPL", "EPPI_FS2W_LVB", "EPPI_FS2P_LAVF", "EPPI_CLIP", "EPPI_ERR",
};
#define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>")
static void
bfin_eppi_gui_setup (struct bfin_eppi *eppi)
{
/* If we are in RX mode, nothing to do. */
if (!(eppi->control & PORT_DIR))
return;
eppi->gui_state = bfin_gui_setup (eppi->gui_state,
eppi->control & PORT_EN,
eppi->hcount,
eppi->vcount,
eppi->color);
}
static unsigned
bfin_eppi_io_write_buffer (struct hw *me, const void *source,
int space, address_word addr, unsigned nr_bytes)
{
struct bfin_eppi *eppi = hw_data (me);
bu32 mmr_off;
bu32 value;
bu16 *value16p;
bu32 *value32p;
void *valuep;
if (nr_bytes == 4)
value = dv_load_4 (source);
else
value = dv_load_2 (source);
mmr_off = addr - eppi->base;
valuep = (void *)((unsigned long)eppi + mmr_base() + mmr_off);
value16p = valuep;
value32p = valuep;
HW_TRACE_WRITE ();
switch (mmr_off)
{
case mmr_offset(status):
dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
dv_w1c_2 (value16p, value, 0x1ff);
break;
case mmr_offset(hcount):
case mmr_offset(hdelay):
case mmr_offset(vcount):
case mmr_offset(vdelay):
case mmr_offset(frame):
case mmr_offset(line):
case mmr_offset(clkdiv):
dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
*value16p = value;
break;
case mmr_offset(control):
*value32p = value;
bfin_eppi_gui_setup (eppi);
break;
case mmr_offset(fs1w_hbl):
case mmr_offset(fs1p_avpl):
case mmr_offset(fsw2_lvb):
case mmr_offset(fs2p_lavf):
case mmr_offset(clip):
case mmr_offset(err):
dv_bfin_mmr_require_32 (me, addr, nr_bytes, true);
*value32p = value;
break;
default:
dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
break;
}
return nr_bytes;
}
static unsigned
bfin_eppi_io_read_buffer (struct hw *me, void *dest,
int space, address_word addr, unsigned nr_bytes)
{
struct bfin_eppi *eppi = hw_data (me);
bu32 mmr_off;
bu16 *value16p;
bu32 *value32p;
void *valuep;
mmr_off = addr - eppi->base;
valuep = (void *)((unsigned long)eppi + mmr_base() + mmr_off);
value16p = valuep;
value32p = valuep;
HW_TRACE_READ ();
switch (mmr_off)
{
case mmr_offset(status):
case mmr_offset(hcount):
case mmr_offset(hdelay):
case mmr_offset(vcount):
case mmr_offset(vdelay):
case mmr_offset(frame):
case mmr_offset(line):
case mmr_offset(clkdiv):
dv_bfin_mmr_require_16 (me, addr, nr_bytes, false);
dv_store_2 (dest, *value16p);
break;
case mmr_offset(control):
case mmr_offset(fs1w_hbl):
case mmr_offset(fs1p_avpl):
case mmr_offset(fsw2_lvb):
case mmr_offset(fs2p_lavf):
case mmr_offset(clip):
case mmr_offset(err):
dv_bfin_mmr_require_32 (me, addr, nr_bytes, false);
dv_store_4 (dest, *value32p);
break;
default:
dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
break;
}
return nr_bytes;
}
static unsigned
bfin_eppi_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_eppi_dma_write_buffer (struct hw *me, const void *source,
int space, unsigned_word addr,
unsigned nr_bytes,
int violate_read_only_section)
{
struct bfin_eppi *eppi = hw_data (me);
HW_TRACE_DMA_WRITE ();
return bfin_gui_update (eppi->gui_state, source, nr_bytes);
}
static const struct hw_port_descriptor bfin_eppi_ports[] =
{
{ "stat", 0, 0, output_port, },
{ NULL, 0, 0, 0, },
};
static void
attach_bfin_eppi_regs (struct hw *me, struct bfin_eppi *eppi)
{
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, &reg))
hw_abort (me, "\"reg\" property must contain three addr/size entries");
hw_unit_address_to_attach_address (hw_parent (me),
&reg.address,
&attach_space, &attach_address, me);
hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
if (attach_size != BFIN_MMR_EPPI_SIZE)
hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_EPPI_SIZE);
hw_attach_address (hw_parent (me),
0, attach_space, attach_address, attach_size, me);
eppi->base = attach_address;
}
static void
bfin_eppi_finish (struct hw *me)
{
struct bfin_eppi *eppi;
const char *color;
eppi = HW_ZALLOC (me, struct bfin_eppi);
set_hw_data (me, eppi);
set_hw_io_read_buffer (me, bfin_eppi_io_read_buffer);
set_hw_io_write_buffer (me, bfin_eppi_io_write_buffer);
set_hw_dma_read_buffer (me, bfin_eppi_dma_read_buffer);
set_hw_dma_write_buffer (me, bfin_eppi_dma_write_buffer);
set_hw_ports (me, bfin_eppi_ports);
attach_bfin_eppi_regs (me, eppi);
/* Initialize the EPPI. */
if (hw_find_property (me, "color"))
color = hw_find_string_property (me, "color");
else
color = NULL;
eppi->color = bfin_gui_color (color);
}
const struct hw_descriptor dv_bfin_eppi_descriptor[] =
{
{"bfin_eppi", bfin_eppi_finish,},
{NULL, NULL},
};