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greybus: control: suppress bundle_activate() for bootrom 

We always knew backward compatibility with the ES3 bootrom, which was
finalised about a year ago, would be a pain. Here we go again.

The bootrom does not support control requests added after it was burnt
into ROM for obvious reasons. This means that we need to suppress
sending the new bundle_activate() operation to any interface executing
the legacy bootrom.

Do so by adding a new NO_PM interface quirk (we can use the
control-protocol version for this later once we bump it).

Note that the interface-disable path (e.g. for power down) is already
handled by the FORCED_DISABLE quirk, and that the suspend/resume
paths are currently avoided by making sure that the bootrom bundle
never suspends.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2016-07-21 14:24:11 +02:00 committed by Greg Kroah-Hartman
parent 350e3ac2ce
commit 2358024b67
4 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/staging/greybus/control.c
View File

@ -329,6 +329,9 @@ int gb_control_bundle_activate(struct gb_control *control, u8 bundle_id)
struct gb_control_bundle_pm_response response;
int ret;
if (!control->has_bundle_activate)
return 0;
request.bundle_id = bundle_id;
ret = gb_operation_sync(control->connection,
GB_CONTROL_TYPE_BUNDLE_ACTIVATE, &request,
@ -528,6 +531,10 @@ int gb_control_enable(struct gb_control *control)
if (control->protocol_major > 0 || control->protocol_minor > 1)
control->has_bundle_version = true;
/* FIXME: use protocol version instead */
if (!(control->intf->quirks & GB_INTERFACE_QUIRK_NO_PM))
control->has_bundle_activate = true;
return 0;
err_disable_connection:

1
drivers/staging/greybus/control.h
View File

@ -19,6 +19,7 @@ struct gb_control {
u8 protocol_major;
u8 protocol_minor;
bool has_bundle_activate;
bool has_bundle_version;
char *vendor_string;

3
drivers/staging/greybus/interface.c
View File

@ -411,7 +411,8 @@ static int gb_interface_read_and_clear_init_status(struct gb_interface *intf)
*/
bootrom_quirks = GB_INTERFACE_QUIRK_NO_CPORT_FEATURES |
GB_INTERFACE_QUIRK_FORCED_DISABLE |
GB_INTERFACE_QUIRK_LEGACY_MODE_SWITCH;
GB_INTERFACE_QUIRK_LEGACY_MODE_SWITCH |
GB_INTERFACE_QUIRK_NO_PM;
switch (init_status) {
case GB_INIT_BOOTROM_UNIPRO_BOOT_STARTED:
case GB_INIT_BOOTROM_FALLBACK_UNIPRO_BOOT_STARTED:

1
drivers/staging/greybus/interface.h
View File

@ -23,6 +23,7 @@ enum gb_interface_type {
#define GB_INTERFACE_QUIRK_NO_ARA_IDS BIT(2)
#define GB_INTERFACE_QUIRK_FORCED_DISABLE BIT(3)
#define GB_INTERFACE_QUIRK_LEGACY_MODE_SWITCH BIT(4)
#define GB_INTERFACE_QUIRK_NO_PM BIT(5)
struct gb_interface {
struct device dev;