diff options
Diffstat (limited to 'meta-quanta/meta-q71l/recipes-phosphor/spictrl/files')
-rw-r--r-- | meta-quanta/meta-q71l/recipes-phosphor/spictrl/files/spimaster.py | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/meta-quanta/meta-q71l/recipes-phosphor/spictrl/files/spimaster.py b/meta-quanta/meta-q71l/recipes-phosphor/spictrl/files/spimaster.py deleted file mode 100644 index dd08372b7..000000000 --- a/meta-quanta/meta-q71l/recipes-phosphor/spictrl/files/spimaster.py +++ /dev/null @@ -1,148 +0,0 @@ -# Copyright (C) 2017 Google 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. - -#!/usr/bin/env python -"""Basic utility for reading and writing registers on an ASPEED BMC. - -The values hardcoded are for the ASPEED AST2400. -""" - -import subprocess -import sys - -IO_TOOL = 'devmem' -PROTECTION_KEY = '0x1E6E2000' -HWTRAP = '0x1E6E2070' -# The AST2400 SCU Password (as int for write_register) -SCU_PASSWORD = 0x1688A8A8 - -# Bits 13:12 -SPI_MASK = 0xffffcfff -# Enable SPI Master -SPI_MASTER = 0x1000 -# Enable SPI Master and SPI Slave to AHB Bridge -SPI_MASTER_SLAVE = 0x2000 -# Enable SPI Pass-through -SPI_BYPASS = 0x3000 - - -def read_register(address): - """Run a tool to read a register value. - - This will convert it to an integer. - """ - - output = subprocess.check_output([IO_TOOL, address]).replace('\n', '') - value = int(output, 16) - return value - - -def write_register(address, value): - """Run a tool to write the 32-bit register value.""" - - subprocess.check_output([IO_TOOL, address, '32', '0x%x' % value]) - return - - -def set_master(value): - """Set Hardware Strapping to SPI Master.""" - - print 'Setting to "SPI Master"' - - masked = value & SPI_MASK - masked |= SPI_MASTER - - print 'setting: 0x%x' % masked - write_register(HWTRAP, masked) - - -def set_ahb_bridge(value): - """Set hardware strapping to spi master and spi-slave to ahb.""" - - print 'Setting to "SPI Master and SPI Slave to AHB Bridge"' - masked = value & SPI_MASK - masked |= SPI_MASTER_SLAVE - - print 'setting: 0x%x' % masked - write_register(HWTRAP, masked) - - -def set_bypass(value): - """Set hardware strappign to spi bypass.""" - - print 'Setting to "Enable SPI Pass-through"' - masked = value & SPI_MASK - masked |= SPI_BYPASS - - print 'setting: 0x%x' % masked - write_register(HWTRAP, masked) - - -def usage(): - """Print usage string.""" - - print 'usage: %s master|bridge|bypass' % sys.argv[0] - print 'master sets the BMC SPI to Master.' - print ('bridge sets the BMC SPI to Master-Slave bridge to AHB (for BIOS ' + - 'Update).') - print 'bypass sets the BMC SPI to Bypass (default).' - - -def main(): - """Main entry point for execution.""" - - if len(sys.argv) != 2: - usage() - sys.exit(-1) - - ctrl = sys.argv[1].lower() - if ctrl not in ('master', 'bridge', 'bypass'): - usage() - sys.exit(-1) - - locked = False - # Check if locked - value = read_register(PROTECTION_KEY) - if value == 1: - print 'Presently unlocked' - else: - print 'Presently locked' - locked = True - - # if Locked we need to unlock it. - if locked: - write_register(PROTECTION_KEY, SCU_PASSWORD) - - # Read the value. - value = read_register(HWTRAP) - if value & SPI_BYPASS == SPI_BYPASS: - print 'Presently set to bypass' - elif value & SPI_MASTER == SPI_MASTER: - print 'Presently set to master' - elif value & SPI_MASTER_SLAVE == SPI_MASTER_SLAVE: - print 'Presently set to master-slave' - - if ctrl == 'master': - set_master(value) - elif ctrl == 'bridge': - set_ahb_bridge(value) - elif ctrl == 'bypass': - set_bypass(value) - - # We leave it unlocked in case it was locked. - # we could lock it. - # TODO(venture): lock it by writing any non-password value. - -if __name__ == '__main__': - main() |