| # Copyright (c) 2012 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| # |
| # Expects to be run in an environment with sudo and no interactive password |
| # prompt, such as within the Chromium OS development chroot. |
| |
| import os |
| |
| import logging, re, time, xmlrpclib |
| |
| from autotest_lib.client.common_lib import error |
| from autotest_lib.server.cros.servo import firmware_programmer |
| |
| # Time to wait when probing for a usb device, it takes on avg 17 seconds |
| # to do a full probe. |
| _USB_PROBE_TIMEOUT = 40 |
| |
| |
| class _PowerStateController(object): |
| |
| """Class to provide board-specific power operations. |
| |
| This class is responsible for "power on" and "power off" |
| operations that can operate without making assumptions in |
| advance about board state. It offers an interface that |
| abstracts out the different sequences required for different |
| board types. |
| |
| """ |
| |
| # Constants acceptable to be passed for the `rec_mode` parameter |
| # to power_on(). |
| # |
| # REC_ON: Boot the DUT in recovery mode, i.e. boot from USB or |
| # SD card. |
| # REC_OFF: Boot in normal mode, i.e. boot from internal storage. |
| |
| REC_ON = 'rec' |
| REC_OFF = 'on' |
| |
| # Delay in seconds needed between asserting and de-asserting |
| # warm reset. |
| _RESET_HOLD_TIME = 0.5 |
| |
| def __init__(self, servo): |
| """Initialize the power state control. |
| |
| @param servo Servo object providing the underlying `set` and `get` |
| methods for the target controls. |
| |
| """ |
| self._servo = servo |
| |
| def reset(self): |
| """Force the DUT to reset. |
| |
| The DUT is guaranteed to be on at the end of this call, |
| regardless of its previous state, provided that there is |
| working OS software. This also guarantees that the EC has |
| been restarted. |
| |
| """ |
| self._servo.set_nocheck('power_state', 'reset') |
| |
| def warm_reset(self): |
| """Apply warm reset to the DUT. |
| |
| This asserts, then de-asserts the 'warm_reset' signal. |
| Generally, this causes the board to restart. |
| |
| """ |
| self._servo.set_get_all(['warm_reset:on', |
| 'sleep:%.4f' % self._RESET_HOLD_TIME, |
| 'warm_reset:off']) |
| |
| def power_off(self): |
| """Force the DUT to power off. |
| |
| The DUT is guaranteed to be off at the end of this call, |
| regardless of its previous state, provided that there is |
| working EC and boot firmware. There is no requirement for |
| working OS software. |
| |
| """ |
| self._servo.set_nocheck('power_state', 'off') |
| |
| def power_on(self, rec_mode=REC_OFF): |
| """Force the DUT to power on. |
| |
| Prior to calling this function, the DUT must be powered off, |
| e.g. with a call to `power_off()`. |
| |
| At power on, recovery mode is set as specified by the |
| corresponding argument. When booting with recovery mode on, it |
| is the caller's responsibility to unplug/plug in a bootable |
| external storage device. |
| |
| If the DUT requires a delay after powering on but before |
| processing inputs such as USB stick insertion, the delay is |
| handled by this method; the caller is not responsible for such |
| delays. |
| |
| @param rec_mode Setting of recovery mode to be applied at |
| power on. default: REC_OFF aka 'off' |
| |
| """ |
| self._servo.set_nocheck('power_state', rec_mode) |
| |
| |
| class Servo(object): |
| |
| """Manages control of a Servo board. |
| |
| Servo is a board developed by hardware group to aide in the debug and |
| control of various partner devices. Servo's features include the simulation |
| of pressing the power button, closing the lid, and pressing Ctrl-d. This |
| class manages setting up and communicating with a servo demon (servod) |
| process. It provides both high-level functions for common servo tasks and |
| low-level functions for directly setting and reading gpios. |
| |
| """ |
| |
| # Power button press delays in seconds. |
| # |
| # The EC specification says that 8.0 seconds should be enough |
| # for the long power press. However, some platforms need a bit |
| # more time. Empirical testing has found these requirements: |
| # Alex: 8.2 seconds |
| # ZGB: 8.5 seconds |
| # The actual value is set to the largest known necessary value. |
| # |
| # TODO(jrbarnette) Being generous is the right thing to do for |
| # existing platforms, but if this code is to be used for |
| # qualification of new hardware, we should be less generous. |
| SHORT_DELAY = 0.1 |
| |
| # Maximum number of times to re-read power button on release. |
| GET_RETRY_MAX = 10 |
| |
| # Delays to deal with DUT state transitions. |
| SLEEP_DELAY = 6 |
| BOOT_DELAY = 10 |
| |
| # Default minimum time interval between 'press' and 'release' |
| # keyboard events. |
| SERVO_KEY_PRESS_DELAY = 0.1 |
| |
| # Time to toggle recovery switch on and off. |
| REC_TOGGLE_DELAY = 0.1 |
| |
| # Time to toggle development switch on and off. |
| DEV_TOGGLE_DELAY = 0.1 |
| |
| # Time between an usb disk plugged-in and detected in the system. |
| USB_DETECTION_DELAY = 10 |
| # Time to keep USB power off before and after USB mux direction is changed |
| USB_POWEROFF_DELAY = 2 |
| |
| # Time to wait before timing out on servo initialization. |
| INIT_TIMEOUT_SECS = 10 |
| |
| |
| def __init__(self, servo_host, servo_serial=None): |
| """Sets up the servo communication infrastructure. |
| |
| @param servo_host: A ServoHost object representing |
| the host running servod. |
| @param servo_serial: Serial number of the servo board. |
| """ |
| # TODO(fdeng): crbug.com/298379 |
| # We should move servo_host object out of servo object |
| # to minimize the dependencies on the rest of Autotest. |
| self._servo_host = servo_host |
| self._servo_serial = servo_serial |
| self._server = servo_host.get_servod_server_proxy() |
| self._power_state = _PowerStateController(self) |
| self._usb_state = None |
| self._programmer = None |
| |
| |
| @property |
| def servo_serial(self): |
| """Returns the serial number of the servo board.""" |
| return self._servo_serial |
| |
| |
| def get_power_state_controller(self): |
| """Return the power state controller for this Servo. |
| |
| The power state controller provides board-independent |
| interfaces for reset, power-on, power-off operations. |
| |
| """ |
| return self._power_state |
| |
| |
| def initialize_dut(self, cold_reset=False): |
| """Initializes a dut for testing purposes. |
| |
| This sets various servo signals back to default values |
| appropriate for the target board. By default, if the DUT |
| is already on, it stays on. If the DUT is powered off |
| before initialization, its state afterward is unspecified. |
| |
| Rationale: Basic initialization of servo sets the lid open, |
| when there is a lid. This operation won't affect powered on |
| units; however, setting the lid open may power on a unit |
| that's off, depending on the board type and previous state |
| of the device. |
| |
| If `cold_reset` is a true value, the DUT and its EC will be |
| reset, and the DUT rebooted in normal mode. |
| |
| @param cold_reset If True, cold reset the device after |
| initialization. |
| """ |
| self._server.hwinit() |
| self.set('usb_mux_oe1', 'on') |
| self._usb_state = None |
| self.switch_usbkey('off') |
| if cold_reset: |
| self._power_state.reset() |
| logging.debug('Servo initialized, version is %s', |
| self._server.get_version()) |
| |
| |
| def is_localhost(self): |
| """Is the servod hosted locally? |
| |
| Returns: |
| True if local hosted; otherwise, False. |
| """ |
| return self._servo_host.is_localhost() |
| |
| |
| def power_long_press(self): |
| """Simulate a long power button press.""" |
| # After a long power press, the EC may ignore the next power |
| # button press (at least on Alex). To guarantee that this |
| # won't happen, we need to allow the EC one second to |
| # collect itself. |
| self._server.power_long_press() |
| |
| |
| def power_normal_press(self): |
| """Simulate a normal power button press.""" |
| self._server.power_normal_press() |
| |
| |
| def power_short_press(self): |
| """Simulate a short power button press.""" |
| self._server.power_short_press() |
| |
| |
| def power_key(self, press_secs=''): |
| """Simulate a power button press. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.power_key(press_secs) |
| |
| |
| def lid_open(self): |
| """Simulate opening the lid and raise exception if all attempts fail""" |
| self.set('lid_open', 'yes') |
| |
| |
| def lid_close(self): |
| """Simulate closing the lid and raise exception if all attempts fail |
| |
| Waits 6 seconds to ensure the device is fully asleep before returning. |
| """ |
| self.set('lid_open', 'no') |
| time.sleep(Servo.SLEEP_DELAY) |
| |
| def volume_up(self, timeout=300): |
| """Simulate pushing the volume down button. |
| |
| @param timeout: Timeout for setting the volume. |
| """ |
| self.set_get_all(['volume_up:yes', |
| 'sleep:%.4f' % self.SERVO_KEY_PRESS_DELAY, |
| 'volume_up:no']) |
| # we need to wait for commands to take effect before moving on |
| time_left = float(timeout) |
| while time_left > 0.0: |
| value = self.get('volume_up') |
| if value == 'no': |
| return |
| time.sleep(self.SHORT_DELAY) |
| time_left = time_left - self.SHORT_DELAY |
| raise error.TestFail("Failed setting volume_up to no") |
| |
| def volume_down(self, timeout=300): |
| """Simulate pushing the volume down button. |
| |
| @param timeout: Timeout for setting the volume. |
| """ |
| self.set_get_all(['volume_down:yes', |
| 'sleep:%.4f' % self.SERVO_KEY_PRESS_DELAY, |
| 'volume_down:no']) |
| # we need to wait for commands to take effect before moving on |
| time_left = float(timeout) |
| while time_left > 0.0: |
| value = self.get('volume_down') |
| if value == 'no': |
| return |
| time.sleep(self.SHORT_DELAY) |
| time_left = time_left - self.SHORT_DELAY |
| raise error.TestFail("Failed setting volume_down to no") |
| |
| def ctrl_d(self, press_secs=''): |
| """Simulate Ctrl-d simultaneous button presses. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.ctrl_d(press_secs) |
| |
| |
| def ctrl_u(self): |
| """Simulate Ctrl-u simultaneous button presses. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.ctrl_u() |
| |
| |
| def ctrl_enter(self, press_secs=''): |
| """Simulate Ctrl-enter simultaneous button presses. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.ctrl_enter(press_secs) |
| |
| |
| def d_key(self, press_secs=''): |
| """Simulate Enter key button press. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.d_key(press_secs) |
| |
| |
| def ctrl_key(self, press_secs=''): |
| """Simulate Enter key button press. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.ctrl_key(press_secs) |
| |
| |
| def enter_key(self, press_secs=''): |
| """Simulate Enter key button press. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.enter_key(press_secs) |
| |
| |
| def refresh_key(self, press_secs=''): |
| """Simulate Refresh key (F3) button press. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.refresh_key(press_secs) |
| |
| |
| def ctrl_refresh_key(self, press_secs=''): |
| """Simulate Ctrl and Refresh (F3) simultaneous press. |
| |
| This key combination is an alternative of Space key. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.ctrl_refresh_key(press_secs) |
| |
| |
| def imaginary_key(self, press_secs=''): |
| """Simulate imaginary key button press. |
| |
| Maps to a key that doesn't physically exist. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.imaginary_key(press_secs) |
| |
| |
| def sysrq_x(self, press_secs=''): |
| """Simulate Alt VolumeUp X simulataneous press. |
| |
| This key combination is the kernel system request (sysrq) X. |
| |
| @param press_secs : Str. Time to press key. |
| """ |
| self._server.sysrq_x(press_secs) |
| |
| |
| def toggle_recovery_switch(self): |
| """Toggle recovery switch on and off.""" |
| self.enable_recovery_mode() |
| time.sleep(self.REC_TOGGLE_DELAY) |
| self.disable_recovery_mode() |
| |
| |
| def enable_recovery_mode(self): |
| """Enable recovery mode on device.""" |
| self.set('rec_mode', 'on') |
| |
| |
| def disable_recovery_mode(self): |
| """Disable recovery mode on device.""" |
| self.set('rec_mode', 'off') |
| |
| |
| def toggle_development_switch(self): |
| """Toggle development switch on and off.""" |
| self.enable_development_mode() |
| time.sleep(self.DEV_TOGGLE_DELAY) |
| self.disable_development_mode() |
| |
| |
| def enable_development_mode(self): |
| """Enable development mode on device.""" |
| self.set('dev_mode', 'on') |
| |
| |
| def disable_development_mode(self): |
| """Disable development mode on device.""" |
| self.set('dev_mode', 'off') |
| |
| def boot_devmode(self): |
| """Boot a dev-mode device that is powered off.""" |
| self.power_short_press() |
| self.pass_devmode() |
| |
| |
| def pass_devmode(self): |
| """Pass through boot screens in dev-mode.""" |
| time.sleep(Servo.BOOT_DELAY) |
| self.ctrl_d() |
| time.sleep(Servo.BOOT_DELAY) |
| |
| |
| def get_board(self): |
| """Get the board connected to servod.""" |
| return self._server.get_board() |
| |
| |
| def get_base_board(self): |
| """Get the board of the base connected to servod.""" |
| try: |
| return self._server.get_base_board() |
| except xmlrpclib.Fault as e: |
| # TODO(waihong): Remove the following compatibility check when |
| # the new versions of hdctools are deployed. |
| if 'not supported' in str(e): |
| logging.warning('The servod is too old that get_base_board ' |
| 'not supported.') |
| return '' |
| raise |
| |
| |
| def _get_xmlrpclib_exception(self, xmlexc): |
| """Get meaningful exception string from xmlrpc. |
| |
| Args: |
| xmlexc: xmlrpclib.Fault object |
| |
| xmlrpclib.Fault.faultString has the following format: |
| |
| <type 'exception type'>:'actual error message' |
| |
| Parse and return the real exception from the servod side instead of the |
| less meaningful one like, |
| <Fault 1: "<type 'exceptions.AttributeError'>:'tca6416' object has no |
| attribute 'hw_driver'"> |
| |
| Returns: |
| string of underlying exception raised in servod. |
| """ |
| return re.sub('^.*>:', '', xmlexc.faultString) |
| |
| |
| def get(self, gpio_name): |
| """Get the value of a gpio from Servod. |
| |
| @param gpio_name Name of the gpio. |
| """ |
| assert gpio_name |
| try: |
| return self._server.get(gpio_name) |
| except xmlrpclib.Fault as e: |
| err_msg = "Getting '%s' :: %s" % \ |
| (gpio_name, self._get_xmlrpclib_exception(e)) |
| raise error.TestFail(err_msg) |
| |
| |
| def set(self, gpio_name, gpio_value): |
| """Set and check the value of a gpio using Servod. |
| |
| @param gpio_name Name of the gpio. |
| @param gpio_value New setting for the gpio. |
| """ |
| self.set_nocheck(gpio_name, gpio_value) |
| retry_count = Servo.GET_RETRY_MAX |
| while gpio_value != self.get(gpio_name) and retry_count: |
| logging.warning("%s != %s, retry %d", gpio_name, gpio_value, |
| retry_count) |
| retry_count -= 1 |
| time.sleep(Servo.SHORT_DELAY) |
| if not retry_count: |
| assert gpio_value == self.get(gpio_name), \ |
| 'Servo failed to set %s to %s' % (gpio_name, gpio_value) |
| |
| |
| def set_nocheck(self, gpio_name, gpio_value): |
| """Set the value of a gpio using Servod. |
| |
| @param gpio_name Name of the gpio. |
| @param gpio_value New setting for the gpio. |
| """ |
| assert gpio_name and gpio_value |
| logging.info('Setting %s to %s', gpio_name, gpio_value) |
| try: |
| self._server.set(gpio_name, gpio_value) |
| except xmlrpclib.Fault as e: |
| err_msg = "Setting '%s' to '%s' :: %s" % \ |
| (gpio_name, gpio_value, self._get_xmlrpclib_exception(e)) |
| raise error.TestFail(err_msg) |
| |
| |
| def set_get_all(self, controls): |
| """Set &| get one or more control values. |
| |
| @param controls: list of strings, controls to set &| get. |
| |
| @raise: error.TestError in case error occurs setting/getting values. |
| """ |
| rv = [] |
| try: |
| logging.info('Set/get all: %s', str(controls)) |
| rv = self._server.set_get_all(controls) |
| except xmlrpclib.Fault as e: |
| # TODO(waihong): Remove the following backward compatibility when |
| # the new versions of hdctools are deployed. |
| if 'not supported' in str(e): |
| logging.warning('The servod is too old that set_get_all ' |
| 'not supported. Use set and get instead.') |
| for control in controls: |
| if ':' in control: |
| (name, value) = control.split(':') |
| if name == 'sleep': |
| time.sleep(float(value)) |
| else: |
| self.set_nocheck(name, value) |
| rv.append(True) |
| else: |
| rv.append(self.get(name)) |
| else: |
| err_msg = "Problem with '%s' :: %s" % \ |
| (controls, self._get_xmlrpclib_exception(e)) |
| raise error.TestFail(err_msg) |
| return rv |
| |
| |
| # TODO(waihong) It may fail if multiple servo's are connected to the same |
| # host. Should look for a better way, like the USB serial name, to identify |
| # the USB device. |
| # TODO(sbasi) Remove this code from autoserv once firmware tests have been |
| # updated. |
| def probe_host_usb_dev(self, timeout=_USB_PROBE_TIMEOUT): |
| """Probe the USB disk device plugged-in the servo from the host side. |
| |
| It uses servod to discover if there is a usb device attached to it. |
| |
| @param timeout The timeout period when probing for the usb host device. |
| |
| @return: String of USB disk path (e.g. '/dev/sdb') or None. |
| """ |
| return self._server.probe_host_usb_dev(timeout) or None |
| |
| |
| def image_to_servo_usb(self, image_path=None, |
| make_image_noninteractive=False): |
| """Install an image to the USB key plugged into the servo. |
| |
| This method may copy any image to the servo USB key including a |
| recovery image or a test image. These images are frequently used |
| for test purposes such as restoring a corrupted image or conducting |
| an upgrade of ec/fw/kernel as part of a test of a specific image part. |
| |
| @param image_path Path on the host to the recovery image. |
| @param make_image_noninteractive Make the recovery image |
| noninteractive, therefore the DUT |
| will reboot automatically after |
| installation. |
| """ |
| # We're about to start plugging/unplugging the USB key. We |
| # don't know the state of the DUT, or what it might choose |
| # to do to the device after hotplug. To avoid surprises, |
| # force the DUT to be off. |
| self._server.hwinit() |
| self._power_state.power_off() |
| |
| # Set up Servo's usb mux. |
| self.switch_usbkey('host') |
| if image_path: |
| logging.info('Searching for usb device and copying image to it. ' |
| 'Please wait a few minutes...') |
| if not self._server.download_image_to_usb(image_path): |
| logging.error('Failed to transfer requested image to USB. ' |
| 'Please take a look at Servo Logs.') |
| raise error.AutotestError('Download image to usb failed.') |
| if make_image_noninteractive: |
| logging.info('Making image noninteractive') |
| if not self._server.make_image_noninteractive(): |
| logging.error('Failed to make image noninteractive. ' |
| 'Please take a look at Servo Logs.') |
| |
| |
| def install_recovery_image(self, image_path=None, |
| make_image_noninteractive=False): |
| """Install the recovery image specified by the path onto the DUT. |
| |
| This method uses google recovery mode to install a recovery image |
| onto a DUT through the use of a USB stick that is mounted on a servo |
| board specified by the usb_dev. If no image path is specified |
| we use the recovery image already on the usb image. |
| |
| @param image_path: Path on the host to the recovery image. |
| @param make_image_noninteractive: Make the recovery image |
| noninteractive, therefore the DUT will reboot automatically |
| after installation. |
| """ |
| self.image_to_servo_usb(image_path, make_image_noninteractive) |
| self._power_state.power_on(rec_mode=self._power_state.REC_ON) |
| self.switch_usbkey('dut') |
| |
| |
| def _scp_image(self, image_path): |
| """Copy image to the servo host. |
| |
| When programming a firmware image on the DUT, the image must be |
| located on the host to which the servo device is connected. Sometimes |
| servo is controlled by a remote host, in this case the image needs to |
| be transferred to the remote host. |
| |
| @param image_path: a string, name of the firmware image file to be |
| transferred. |
| @return: a string, full path name of the copied file on the remote. |
| """ |
| |
| dest_path = os.path.join('/tmp', os.path.basename(image_path)) |
| self._servo_host.send_file(image_path, dest_path) |
| return dest_path |
| |
| |
| def system(self, command, timeout=3600): |
| """Execute the passed in command on the servod host. |
| |
| @param command Command to be executed. |
| @param timeout Maximum number of seconds of runtime allowed. Default to |
| 1 hour. |
| """ |
| logging.info('Will execute on servo host: %s', command) |
| self._servo_host.run(command, timeout=timeout) |
| |
| |
| def system_output(self, command, timeout=3600, |
| ignore_status=False, args=()): |
| """Execute the passed in command on the servod host, return stdout. |
| |
| @param command a string, the command to execute |
| @param timeout an int, max number of seconds to wait til command |
| execution completes. Default to 1 hour. |
| @param ignore_status a Boolean, if true - ignore command's nonzero exit |
| status, otherwise an exception will be thrown |
| @param args a tuple of strings, each becoming a separate command line |
| parameter for the command |
| @return command's stdout as a string. |
| """ |
| return self._servo_host.run(command, timeout=timeout, |
| ignore_status=ignore_status, |
| args=args).stdout.strip() |
| |
| |
| def get_servo_version(self): |
| """Get the version of the servo, e.g., servo_v2 or servo_v3. |
| |
| @return: The version of the servo. |
| |
| """ |
| return self._server.get_version() |
| |
| |
| def _initialize_programmer(self, rw_only=False): |
| """Initialize the firmware programmer. |
| |
| @param rw_only: True to initialize a programmer which only |
| programs the RW portions. |
| """ |
| if self._programmer: |
| return |
| # Initialize firmware programmer |
| servo_version = self.get_servo_version() |
| if servo_version.startswith('servo_v2'): |
| self._programmer = firmware_programmer.ProgrammerV2(self) |
| self._programmer_rw = firmware_programmer.ProgrammerV2RwOnly(self) |
| # Both servo v3 and v4 use the same programming methods so just leverage |
| # ProgrammerV3 for servo v4 as well. |
| elif (servo_version.startswith('servo_v3') or |
| servo_version.startswith('servo_v4')): |
| self._programmer = firmware_programmer.ProgrammerV3(self) |
| self._programmer_rw = firmware_programmer.ProgrammerV3RwOnly(self) |
| else: |
| raise error.TestError( |
| 'No firmware programmer for servo version: %s' % |
| servo_version) |
| |
| |
| def program_bios(self, image, rw_only=False): |
| """Program bios on DUT with given image. |
| |
| @param image: a string, file name of the BIOS image to program |
| on the DUT. |
| @param rw_only: True to only program the RW portion of BIOS. |
| |
| """ |
| self._initialize_programmer() |
| if not self.is_localhost(): |
| image = self._scp_image(image) |
| if rw_only: |
| self._programmer_rw.program_bios(image) |
| else: |
| self._programmer.program_bios(image) |
| |
| |
| def program_ec(self, image, rw_only=False): |
| """Program ec on DUT with given image. |
| |
| @param image: a string, file name of the EC image to program |
| on the DUT. |
| @param rw_only: True to only program the RW portion of EC. |
| |
| """ |
| self._initialize_programmer() |
| if not self.is_localhost(): |
| image = self._scp_image(image) |
| if rw_only: |
| self._programmer_rw.program_ec(image) |
| else: |
| self._programmer.program_ec(image) |
| |
| |
| def _switch_usbkey_power(self, power_state, detection_delay=False): |
| """Switch usbkey power. |
| |
| This function switches usbkey power by setting the value of |
| 'prtctl4_pwren'. If the power is already in the |
| requested state, this function simply returns. |
| |
| @param power_state: A string, 'on' or 'off'. |
| @param detection_delay: A boolean value, if True, sleep |
| for |USB_DETECTION_DELAY| after switching |
| the power on. |
| """ |
| # TODO(kevcheng): Forgive me for this terrible hack. This is just to |
| # handle beaglebones that haven't yet updated and have the |
| # safe_switch_usbkey_power RPC. I'll remove this once all beaglebones |
| # have been updated and also think about a better way to handle |
| # situations like this. |
| try: |
| self._server.safe_switch_usbkey_power(power_state) |
| except Exception: |
| self.set('prtctl4_pwren', power_state) |
| if power_state == 'off': |
| time.sleep(self.USB_POWEROFF_DELAY) |
| elif detection_delay: |
| time.sleep(self.USB_DETECTION_DELAY) |
| |
| |
| def switch_usbkey(self, usb_state): |
| """Connect USB flash stick to either host or DUT, or turn USB port off. |
| |
| This function switches the servo multiplexer to provide electrical |
| connection between the USB port J3 and either host or DUT side. It |
| can also be used to turn the USB port off. |
| |
| Switching to 'dut' or 'host' is accompanied by powercycling |
| of the USB stick, because it sometimes gets wedged if the mux |
| is switched while the stick power is on. |
| |
| @param usb_state: A string, one of 'dut', 'host', or 'off'. |
| 'dut' and 'host' indicate which side the |
| USB flash device is required to be connected to. |
| 'off' indicates turning the USB port off. |
| |
| @raise: error.TestError in case the parameter is not 'dut' |
| 'host', or 'off'. |
| """ |
| if self.get_usbkey_direction() == usb_state: |
| return |
| |
| if usb_state == 'off': |
| self._switch_usbkey_power('off') |
| self._usb_state = usb_state |
| return |
| elif usb_state == 'host': |
| mux_direction = 'servo_sees_usbkey' |
| elif usb_state == 'dut': |
| mux_direction = 'dut_sees_usbkey' |
| else: |
| raise error.TestError('Unknown USB state request: %s' % usb_state) |
| |
| self._switch_usbkey_power('off') |
| # TODO(kevcheng): Forgive me for this terrible hack. This is just to |
| # handle beaglebones that haven't yet updated and have the |
| # safe_switch_usbkey RPC. I'll remove this once all beaglebones have |
| # been updated and also think about a better way to handle situations |
| # like this. |
| try: |
| self._server.safe_switch_usbkey(mux_direction) |
| except Exception: |
| self.set('usb_mux_sel1', mux_direction) |
| time.sleep(self.USB_POWEROFF_DELAY) |
| self._switch_usbkey_power('on', usb_state == 'host') |
| self._usb_state = usb_state |
| |
| |
| def get_usbkey_direction(self): |
| """Get which side USB is connected to or 'off' if usb power is off. |
| |
| @return: A string, one of 'dut', 'host', or 'off'. |
| """ |
| if not self._usb_state: |
| if self.get('prtctl4_pwren') == 'off': |
| self._usb_state = 'off' |
| elif self.get('usb_mux_sel1').startswith('dut'): |
| self._usb_state = 'dut' |
| else: |
| self._usb_state = 'host' |
| return self._usb_state |
