ecp5: Helper functions for I/O placement and checking
Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah
parent
7fd45c0cdf
commit
baa673f9ed
217
ecp5/io.cc
Normal file
217
ecp5/io.cc
Normal file
@ -0,0 +1,217 @@
|
|||||||
|
/*
|
||||||
|
* nextpnr -- Next Generation Place and Route
|
||||||
|
*
|
||||||
|
* Copyright (C) 2018 David Shah <david@symbioticeda.com>
|
||||||
|
*
|
||||||
|
* Permission to use, copy, modify, and/or distribute this software for any
|
||||||
|
* purpose with or without fee is hereby granted, provided that the above
|
||||||
|
* copyright notice and this permission notice appear in all copies.
|
||||||
|
*
|
||||||
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||||
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||||
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||||
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||||
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||||
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||||
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "io.h"
|
||||||
|
|
||||||
|
NEXTPNR_NAMESPACE_BEGIN
|
||||||
|
|
||||||
|
std::string iovoltage_to_str(IOVoltage v)
|
||||||
|
{
|
||||||
|
switch (v) {
|
||||||
|
case IOVoltage::VCC_3V3:
|
||||||
|
return "3V3";
|
||||||
|
case IOVoltage::VCC_2V5:
|
||||||
|
return "2V5";
|
||||||
|
case IOVoltage::VCC_1V8:
|
||||||
|
return "1V8";
|
||||||
|
case IOVoltage::VCC_1V5:
|
||||||
|
return "1V5";
|
||||||
|
case IOVoltage::VCC_1V35:
|
||||||
|
return "1V35";
|
||||||
|
case IOVoltage::VCC_1V2:
|
||||||
|
return "1V2";
|
||||||
|
}
|
||||||
|
NPNR_ASSERT_FALSE("unknown IO voltage");
|
||||||
|
}
|
||||||
|
|
||||||
|
IOVoltage iovoltage_from_str(const std::string &name)
|
||||||
|
{
|
||||||
|
if (name == "3V3")
|
||||||
|
return IOVoltage::VCC_3V3;
|
||||||
|
if (name == "2V5")
|
||||||
|
return IOVoltage::VCC_2V5;
|
||||||
|
if (name == "1V8")
|
||||||
|
return IOVoltage::VCC_1V8;
|
||||||
|
if (name == "1V5")
|
||||||
|
return IOVoltage::VCC_1V5;
|
||||||
|
if (name == "1V35")
|
||||||
|
return IOVoltage::VCC_1V35;
|
||||||
|
if (name == "1V2")
|
||||||
|
return IOVoltage::VCC_1V2;
|
||||||
|
NPNR_ASSERT_FALSE("unknown IO voltage");
|
||||||
|
}
|
||||||
|
|
||||||
|
std::string iotype_to_str(IOType type)
|
||||||
|
{
|
||||||
|
if (type == IOType::TYPE_NONE)
|
||||||
|
return "NONE";
|
||||||
|
#define X(t) \
|
||||||
|
if (type == IOType::t) \
|
||||||
|
return #t;
|
||||||
|
#include "iotypes.inc"
|
||||||
|
#undef X
|
||||||
|
if (type == IOType::TYPE_UNKNOWN)
|
||||||
|
return "<unknown>";
|
||||||
|
NPNR_ASSERT_FALSE("unknown IO type");
|
||||||
|
}
|
||||||
|
|
||||||
|
IOType ioType_from_str(const std::string &name)
|
||||||
|
{
|
||||||
|
if (name == "NONE")
|
||||||
|
return IOType::TYPE_NONE;
|
||||||
|
#define X(t) \
|
||||||
|
if (name == #t) \
|
||||||
|
return IOType::t;
|
||||||
|
#include "iotypes.inc"
|
||||||
|
return IOType::TYPE_UNKNOWN;
|
||||||
|
}
|
||||||
|
|
||||||
|
IOVoltage get_vccio(IOType type)
|
||||||
|
{
|
||||||
|
switch (type) {
|
||||||
|
case IOType::LVTTL33:
|
||||||
|
case IOType::LVCMOS33:
|
||||||
|
case IOType::LVCMOS33D:
|
||||||
|
case IOType::LVPECL33:
|
||||||
|
case IOType::LVPECL33E:
|
||||||
|
return IOVoltage::VCC_3V3;
|
||||||
|
case IOType::LVCMOS25:
|
||||||
|
case IOType::LVCMOS25D:
|
||||||
|
case IOType::LVDS:
|
||||||
|
case IOType::SLVS:
|
||||||
|
case IOType::SUBLVDS:
|
||||||
|
case IOType::LVDS25E:
|
||||||
|
case IOType::MLVDS25:
|
||||||
|
case IOType::MLVDS25E:
|
||||||
|
case IOType::BLVDS25:
|
||||||
|
return IOVoltage::VCC_2V5;
|
||||||
|
case IOType::LVCMOS18:
|
||||||
|
case IOType::LVCMOS18D:
|
||||||
|
case IOType::SSTL18_I:
|
||||||
|
case IOType::SSTL18_II:
|
||||||
|
case IOType::SSTL18D_I:
|
||||||
|
case IOType::SSTL18D_II:
|
||||||
|
return IOVoltage::VCC_1V8;
|
||||||
|
case IOType::LVCMOS15:
|
||||||
|
case IOType::SSTL15_I:
|
||||||
|
case IOType::SSTL15_II:
|
||||||
|
case IOType::SSTL15D_I:
|
||||||
|
case IOType::SSTL15D_II:
|
||||||
|
return IOVoltage::VCC_1V5;
|
||||||
|
case IOType::SSTL135_I:
|
||||||
|
case IOType::SSTL135_II:
|
||||||
|
case IOType::SSTL135D_I:
|
||||||
|
case IOType::SSTL135D_II:
|
||||||
|
return IOVoltage::VCC_1V35;
|
||||||
|
case IOType::LVCMOS12:
|
||||||
|
case IOType::HSUL12:
|
||||||
|
case IOType::HSUL12D:
|
||||||
|
return IOVoltage::VCC_1V2;
|
||||||
|
default:
|
||||||
|
NPNR_ASSERT_FALSE("unknown IO type, unable to determine VccIO");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
bool is_strong_vccio_constraint(IOType type, PortType dir, IOSide side)
|
||||||
|
{
|
||||||
|
if (dir == PORT_OUT || dir == PORT_INOUT)
|
||||||
|
return true;
|
||||||
|
switch (type) {
|
||||||
|
case IOType::TYPE_NONE:
|
||||||
|
case IOType::LVCMOS33D:
|
||||||
|
case IOType::LVPECL33:
|
||||||
|
case IOType::LVDS:
|
||||||
|
case IOType::MLVDS25:
|
||||||
|
case IOType::BLVDS25:
|
||||||
|
case IOType::SLVS:
|
||||||
|
case IOType::SUBLVDS:
|
||||||
|
case IOType::LVCMOS12:
|
||||||
|
case IOType::HSUL12:
|
||||||
|
case IOType::HSUL12D:
|
||||||
|
return false;
|
||||||
|
case IOType::LVCMOS33:
|
||||||
|
case IOType::LVTTL33:
|
||||||
|
case IOType::LVCMOS25:
|
||||||
|
return (side == IOSide::LEFT || side == IOSide::RIGHT);
|
||||||
|
default:
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
bool is_differential(IOType type)
|
||||||
|
{
|
||||||
|
switch (type) {
|
||||||
|
case IOType::LVCMOS33D:
|
||||||
|
case IOType::LVCMOS25D:
|
||||||
|
case IOType::LVPECL33:
|
||||||
|
case IOType::LVDS:
|
||||||
|
case IOType::MLVDS25:
|
||||||
|
case IOType::BLVDS25:
|
||||||
|
case IOType::SLVS:
|
||||||
|
case IOType::SUBLVDS:
|
||||||
|
case IOType::LVCMOS18D:
|
||||||
|
case IOType::SSTL18D_I:
|
||||||
|
case IOType::SSTL18D_II:
|
||||||
|
case IOType::SSTL15D_I:
|
||||||
|
case IOType::SSTL15D_II:
|
||||||
|
case IOType::SSTL135D_I:
|
||||||
|
case IOType::SSTL135D_II:
|
||||||
|
case IOType::HSUL12D:
|
||||||
|
return true;
|
||||||
|
default:
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
bool is_referenced(IOType type)
|
||||||
|
{
|
||||||
|
switch (type) {
|
||||||
|
case IOType::SSTL18_I:
|
||||||
|
case IOType::SSTL18_II:
|
||||||
|
case IOType::SSTL18D_I:
|
||||||
|
case IOType::SSTL18D_II:
|
||||||
|
case IOType::SSTL15_I:
|
||||||
|
case IOType::SSTL15_II:
|
||||||
|
case IOType::SSTL15D_I:
|
||||||
|
case IOType::SSTL15D_II:
|
||||||
|
case IOType::SSTL135_I:
|
||||||
|
case IOType::SSTL135_II:
|
||||||
|
case IOType::SSTL135D_I:
|
||||||
|
case IOType::SSTL135D_II:
|
||||||
|
case IOType::HSUL12:
|
||||||
|
case IOType::HSUL12D:
|
||||||
|
return true;
|
||||||
|
default:
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
bool valid_loc_for_io(IOType type, PortType dir, IOSide side, int z)
|
||||||
|
{
|
||||||
|
bool is_lr = side == IOSide::LEFT || side == IOSide::RIGHT;
|
||||||
|
if (is_referenced(type) && !is_lr)
|
||||||
|
return false;
|
||||||
|
if (is_differential(type) && (!is_lr || ((z % 2) == 1)))
|
||||||
|
return false;
|
||||||
|
if ((type == IOType::LVCMOS18D || type == IOType::LVDS) && (dir == PORT_OUT || PORT_INOUT) && z != 0)
|
||||||
|
return false;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
NEXTPNR_NAMESPACE_END
|
||||||
70
ecp5/io.h
Normal file
70
ecp5/io.h
Normal file
@ -0,0 +1,70 @@
|
|||||||
|
/*
|
||||||
|
* nextpnr -- Next Generation Place and Route
|
||||||
|
*
|
||||||
|
* Copyright (C) 2018 David Shah <david@symbioticeda.com>
|
||||||
|
*
|
||||||
|
* Permission to use, copy, modify, and/or distribute this software for any
|
||||||
|
* purpose with or without fee is hereby granted, provided that the above
|
||||||
|
* copyright notice and this permission notice appear in all copies.
|
||||||
|
*
|
||||||
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||||
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||||
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||||
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||||
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||||
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||||
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef IO_H
|
||||||
|
#define IO_H
|
||||||
|
|
||||||
|
#include "nextpnr.h"
|
||||||
|
|
||||||
|
NEXTPNR_NAMESPACE_BEGIN
|
||||||
|
|
||||||
|
enum class IOVoltage
|
||||||
|
{
|
||||||
|
VCC_3V3,
|
||||||
|
VCC_2V5,
|
||||||
|
VCC_1V8,
|
||||||
|
VCC_1V5,
|
||||||
|
VCC_1V35,
|
||||||
|
VCC_1V2
|
||||||
|
};
|
||||||
|
|
||||||
|
std::string iovoltage_to_str(IOVoltage v);
|
||||||
|
IOVoltage iovoltage_from_str(const std::string &name);
|
||||||
|
|
||||||
|
enum class IOType
|
||||||
|
{
|
||||||
|
TYPE_NONE,
|
||||||
|
#define X(t) t,
|
||||||
|
#include "iotypes.inc"
|
||||||
|
#undef X
|
||||||
|
TYPE_UNKNOWN,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum class IOSide
|
||||||
|
{
|
||||||
|
LEFT,
|
||||||
|
RIGHT,
|
||||||
|
TOP,
|
||||||
|
BOTTOM,
|
||||||
|
};
|
||||||
|
|
||||||
|
std::string iotype_to_str(IOType type);
|
||||||
|
IOType ioType_from_str(const std::string &name);
|
||||||
|
|
||||||
|
// IO related functions
|
||||||
|
IOVoltage get_vccio(IOType type);
|
||||||
|
bool is_strong_vccio_constraint(IOType type, PortType dir, IOSide side);
|
||||||
|
bool is_differential(IOType type);
|
||||||
|
bool is_referenced(IOType type);
|
||||||
|
|
||||||
|
bool valid_loc_for_io(IOType type, PortType dir, IOSide side, int z);
|
||||||
|
|
||||||
|
NEXTPNR_NAMESPACE_END
|
||||||
|
|
||||||
|
#endif
|
||||||
37
ecp5/iotypes.inc
Normal file
37
ecp5/iotypes.inc
Normal file
@ -0,0 +1,37 @@
|
|||||||
|
X(LVTTL33)
|
||||||
|
X(LVCMOS33)
|
||||||
|
X(LVCMOS25)
|
||||||
|
X(LVCMOS18)
|
||||||
|
X(LVCMOS15)
|
||||||
|
X(LVCMOS12)
|
||||||
|
|
||||||
|
X(SSTL18_I)
|
||||||
|
X(SSTL18_II)
|
||||||
|
X(SSTL15_I)
|
||||||
|
X(SSTL15_II)
|
||||||
|
X(SSTL135_I)
|
||||||
|
X(SSTL135_II)
|
||||||
|
X(HSUL12)
|
||||||
|
|
||||||
|
X(SSTL18D_I)
|
||||||
|
X(SSTL18D_II)
|
||||||
|
X(SSTL135D_I)
|
||||||
|
X(SSTL135D_II)
|
||||||
|
X(SSTL15D_I)
|
||||||
|
X(SSTL15D_II)
|
||||||
|
X(HSUL12D)
|
||||||
|
X(LVCMOS33D)
|
||||||
|
X(LVCMOS25D)
|
||||||
|
|
||||||
|
X(LVDS)
|
||||||
|
X(BLVDS25)
|
||||||
|
X(MLVDS25)
|
||||||
|
X(LVPECL33)
|
||||||
|
X(SLVS)
|
||||||
|
X(SUBLVDS)
|
||||||
|
X(LVCMOS18D)
|
||||||
|
|
||||||
|
X(LVDS25E)
|
||||||
|
X(BLVDS25E)
|
||||||
|
X(MLVDS25E)
|
||||||
|
X(LVPECL33E)
|
||||||
Loading…
Reference in New Issue
Block a user