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greybus: svc: implement svc_intf_activate 

With upcoming firmware changes we will switch from an SVC-driven module
boot sequence to an AP-driven module sequence. This operation allows the
AP to request the SVC to boot a module to which the AP has previouslt
requested power be applied. This operation will also determine if the
remote interface is a dummy module, UniPro-only module, or full Greybus
module.

Testing done: Tested together with "new" firmware boot sequence to
              verify that modules are detected and booted as expected.

Signed-off-by: Jeffrey Carlyle <jcarlyle@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
hifive-unleashed-5.1
Jeffrey Carlyle 2016-05-06 12:43:53 -07:00 committed by Greg Kroah-Hartman
parent 144763bf8e
commit 140026b32f
1 changed files with 16 additions and 3 deletions
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19
drivers/staging/greybus/svc.c
View File

@ -15,7 +15,8 @@
#define SVC_KEY_ARA_BUTTON KEY_A
#define SVC_INTF_EJECT_TIMEOUT 9000
#define SVC_INTF_EJECT_TIMEOUT 9000
#define SVC_INTF_ACTIVATE_TIMEOUT 6000
struct gb_svc_deferred_request {
struct work_struct work;
@ -326,9 +327,21 @@ int gb_svc_intf_unipro_set(struct gb_svc *svc, u8 intf_id, bool enable)
int gb_svc_intf_activate(struct gb_svc *svc, u8 intf_id, u8 *intf_type)
{
/* FIXME: implement */
struct gb_svc_intf_activate_request request;
struct gb_svc_intf_activate_response response;
int ret;
*intf_type = GB_SVC_INTF_TYPE_GREYBUS;
request.intf_id = intf_id;
ret = gb_operation_sync_timeout(svc->connection,
GB_SVC_TYPE_INTF_ACTIVATE,
&request, sizeof(request),
&response, sizeof(response),
SVC_INTF_ACTIVATE_TIMEOUT);
if (ret < 0)
return ret;
*intf_type = response.intf_type;
return 0;
}