# SPDX-License-Identifier: Apache-2.0
# Copyright 2019 Blue Cheetah Analog Design Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Any, Dict, cast, Type, Optional, List, Tuple
from enum import IntEnum
from bag.design.module import Module
from bag.layout.template import TemplateDB
from bag.util.immutable import Param
from bag.util.importlib import import_class
from xbase.layout.mos.base import MOSBase
from xbase.layout.mos.top import GenericWrapper
[docs]class STDCellWithTap(MOSBase):
"""A MOSArrayWrapper that works with any given generator class."""
def __init__(self, temp_db: TemplateDB, params: Param, **kwargs: Any) -> None:
MOSBase.__init__(self, temp_db, params, **kwargs)
self._sch_cls: Optional[Type[Module]] = None
self._core: Optional[MOSBase] = None
@property
[docs] def core(self) -> MOSBase:
return self._core
@classmethod
[docs] def get_params_info(cls) -> Dict[str, str]:
return dict(
cls_name='wrapped class name.',
params='parameters for the wrapped class.',
pwr_gnd_list='List of supply names for each tile.',
)
@classmethod
[docs] def get_default_param_values(cls) -> Dict[str, Any]:
return dict(pwr_gnd_list=None)
[docs] def get_schematic_class_inst(self) -> Optional[Type[Module]]:
return self._sch_cls
[docs] def get_layout_basename(self) -> str:
cls_name: str = self.params['cls_name']
cls_name = cls_name.split('.')[-1]
return cls_name + 'Tap'
[docs] def draw_layout(self) -> None:
gen_cls = cast(Type[MOSBase], import_class(self.params['cls_name']))
pwr_gnd_list: List[Tuple[str, str]] = self.params['pwr_gnd_list']
master: MOSBase = self.new_template(gen_cls, params=self.params['params'])
self._core = master
self.draw_base(master.draw_base_info)
num_tiles = master.num_tile_rows
tap_ncol = max((self.get_tap_ncol(tile_idx=tile_idx) for tile_idx in range(num_tiles)))
tap_sep_col = self.sub_sep_col
num_cols = master.num_cols + 2 * (tap_sep_col + tap_ncol)
self.set_mos_size(num_cols, num_tiles=num_tiles)
# breakpoint()
if not pwr_gnd_list:
pwr_gnd_list = [('VDD', 'VSS')] * num_tiles
elif len(pwr_gnd_list) != num_tiles:
raise ValueError('pwr_gnd_list length mismatch.')
inst = self.add_tile(master, 0, tap_ncol + tap_sep_col)
sup_names = set()
for tidx in range(num_tiles):
pwr_name, gnd_name = pwr_gnd_list[tidx]
sup_names.add(pwr_name)
sup_names.add(gnd_name)
vdd_list = []
vss_list = []
self.add_tap(0, vdd_list, vss_list, tile_idx=tidx)
self.add_tap(num_cols, vdd_list, vss_list, tile_idx=tidx, flip_lr=True)
self.add_pin(pwr_name, vdd_list, connect=True)
self.add_pin(gnd_name, vss_list, connect=True)
for name in inst.port_names_iter():
if name in sup_names:
self.reexport(inst.get_port(name), connect=True)
else:
self.reexport(inst.get_port(name))
self.sch_params = master.sch_params
self._sch_cls = master.get_schematic_class_inst()
[docs]class STDCellWrapper(GenericWrapper):
"""A MOSArrayWrapper that works with any given generator class."""
def __init__(self, temp_db: TemplateDB, params: Param, **kwargs: Any) -> None:
GenericWrapper.__init__(self, temp_db, params, **kwargs)
@property
[docs] def core(self) -> MOSBase:
real_core = super().core
if self.params['draw_taps']:
return cast(STDCellWrapper, real_core).core
return real_core
@classmethod
[docs] def get_params_info(cls) -> Dict[str, str]:
return dict(
cls_name='wrapped class name.',
params='parameters for the wrapped class.',
draw_taps='True to draw taps.',
pwr_gnd_list='List of supply names for each tile.',
)
@classmethod
[docs] def get_default_param_values(cls) -> Dict[str, Any]:
return dict(draw_taps=True, pwr_gnd_list=[])
[docs] def draw_layout(self) -> None:
cls_name: str = self.params['cls_name']
params: Param = self.params['params']
draw_taps: bool = self.params['draw_taps']
pwr_gnd_list: List[Tuple[str, str]] = self.params['pwr_gnd_list']
if draw_taps:
master = self.new_template(STDCellWithTap,
params=dict(cls_name=cls_name, params=params,
pwr_gnd_list=pwr_gnd_list))
else:
gen_cls = cast(Type[MOSBase], import_class(cls_name))
master = self.new_template(gen_cls, params=params)
self.wrap_mos_base(master, False)