In order to provide deep inspection of the greybus/UniPro system
instrumentation of

1. APBridge's view of UniPro latency
2. GPBridge's view of internal firmware-only latency

have both been added and reported to the AP in the transfer loopback
response header. When this data are present we latch and average it over
the number of requested cycles, presenting it to user-space via sysfs.

This patch adds the following sysfs entries for each loopback CPort

- apbridge_unipro_latency_avg_con
- apbridge_unipro_latency_max_con
- apbridge_unipro_latency_min_con
- gpbridge_firmware_latency_avg_con
- gpbridge_firmware_latency_max_con
- gpbridge_firmware_latency_min_con

and the following sysfs entries representing the average values across all
available CPorts

- apbridge_unipro_latency_avg_dev
- apbridge_unipro_latency_max_dev
- apbridge_unipro_latency_min_dev
- gpbridge_firmware_latency_avg_dev
- gpbridge_firmware_latency_max_dev
- gpbridge_firmware_latency_min_dev
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

This patch adds tracker variables to hold the incoming firmware derived
timestamps where apbridge_latency_ts will contain the APBridge's view of
the UniPro turn-around time and gpbridge_latency_ts will contain the
GPBridge's view of it's own internal latency. Both values are reported
in microseconds.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

A USB vendor command has been added to APBridge to allow for tagging of
specific CPort identifiers with internal timing data, specifically geared
towards capturing and understanding latencies in the UniPro fabric. This
patch sends a command to APBridge for each known loopback CPort to tag data
as appropriate. Subsequent patches will present this data to user-space for
ongoing integration analysis.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

This patch adds a layered wrapper around optional latency tag
enable/disable commands to APBridge. When set APBridge and GPBridge will
insert timing information into reserved fields in the loopback response
header. Correspondingly when unset no timing information will be included
in the response payload.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

As part of an effort to get deep inspection of latencies throughout the
greybus network including HSIC, UniPro and firmware incurred latencies a
new command to the APBridge to tag a known offset with timestamping data
has been introduced. This patch adds that code to the es1 and es2 drivers.

- latency_tag_enable
- latency_tag_disable

Respectively send the enable/disable command to APBridge on a per-CPort
basis. This allows only specified cports to have timestamping data added by
APBridge, leaving any CPort not specifically enabled untouched.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the raw driver to use the bundle pointer instead of the
connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the control code to use the bundle pointer instead
of the connection pointer for printing out error messages.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the operation code to use to use the bundle pointer
instead of the connection pointer when printing out error messages.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the usb driver to use the bundle pointer instead of the
connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the sdio driver to use the bundle pointer instead of
the connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the light driver to use the bundle pointer instead of
the connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the pwm driver to use the bundle pointer instead of the
connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the i2c driver to use the bundle pointer instead of the
connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the gpio driver to use the bundle pointer instead of
the connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the firmware driver to use the bundle pointer instead
of the connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the audio driver to use the bundle pointer instead of
the connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the hid driver to use the bundle pointer instead of the
connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the spi driver to use the bundle pointer instead of the
connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the uart driver to use the bundle pointer instead of
the connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

We are removing struct device from the gb_connection structure in the
near future.  The gb_bundle structure's struct device should be used as
a replacement.

This patch moves the vibrator driver to use the bundle pointer instead
of the connection pointer.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Alex Elder <elder@linaro.org>

The greybus specification has been extended to include two new reserved
fields, which the implementation is using to track internal firmware
latencies. This change adds the appropriate fields to the corresponding
kernel header.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

The ARM-specific set_irq_flags helper has been removed in 4.3. Instead
of doing conditional compilation on the kernel version to avoid build
breakages, simply use the genirq interface directly.
Suggested-by: Rob Herring <rob.herring@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Add PWM to the kernel config options that shall be enabled.

When PWM is not enabled connection init will fail with

	greybus endo0:3:4:9:9: failed to register PWM: -22

when using the default manifest.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Remove duplicate protocol lookup error message, which has already been
logged.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Make protocol lookup error more informative, by moving it to
gb_connection_bind_protocol and using dev_err.

Also make sure to use hex format for the protocol id as that is what is
used everywhere else.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Add missing error handling when registering the vibrator protocol during
module init.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Include function, protocol name and id when printing the version
response debug message.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Issue a warning if we fail to look up a protocol when dropping a
reference.

This should never happen as we hold a reference to the protocol module
and protocols should only be deregistered at module unload.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

A protocol should be deregistered exactly once when the protocol module
is being unloaded. This means that protocol deregister will never be
called with active users as we take a module reference when looking up a
protocol.

Remove comment suggesting that we could one day forcefully stop a user
of a protocol, and issue a big warning if a protocol is deregistered
more than once or at some other time than during module unload (e.g.
with active users).
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Clean up and improve error messages.

Demote a warning message to warning level.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Drop FIXME about sending responses in OOM situations.

If we fail to allocate an operation for an incoming request, we have
bigger problems than to worry about sending a response.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Replace a couple of pr_err with more informative dev_err and clean up
the messages somewhat.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Replace the remaining pr_err with dev_err, and drop redundant function
prefixes.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

gb_connection_bind_protocol() returns proper error codes now and we
should destroy the connection on failures.

This change also fixes a NULL deref on hotplug when the control connection fails
to initialize.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Toshiba UniPro IP requires to reset the CPort that has been used in a previous
connection. This commit implement a new control request in order to
reset CPorts on an APBridgeA.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

When translating capabilities from greybus to mmc values add some
parentheses to clarify operation precedence and avoid static analyses
warnings.

[sdio.c:81]: (style) Clarify calculation precedence for '&' and '?'
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

It was missing the translation between the ocr vdd values of greybus to
mmc_core values. This would make the detection of range voltage fail.

mmc: host doesn't support card's voltages
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

In kernel versions bellow 3.15, the mmc_card_is_removable helper
function has an extra check used for a suspend/resume hack. This made
the gd_sdio_process_event to behave badly handling the module card
insert event in that versions.

So, just test bit the flag that we need, instead of using the helper
function. This way will work in all kernel versions.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

Frequency maximum and minimum are needed to complete the configuration
of the controller. Add them to get_caps response operation.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

We need to skip setting E2EFC and other flags to the SVC connection
create request, for all cports, on an interface that need to boot over
unipro, i.e. interfaces required to download firmware.

This also adds a FIXME as we need to do it differently for ES3.
Tested-by: Eli Sennesh <esennesh@leaflabs.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off by: Eli Sennesh <esennesh@leaflabs.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>