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greybus: hd: add optional cport enable and disable callbacks

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Add optional cport enable and disable callbacks to the greybus host
drivers, that can be used to initialise and allocate/release resources
associated with a cport during connection setup/teardown (e.g. software
queues and hardware state).

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2015-09-17 13:17:26 +02:00 committed by Greg Kroah-Hartman
parent 2846d3ed2e
commit d7ea30a571
2 changed files with 38 additions and 1 deletions
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37
drivers/staging/greybus/connection.c
View File

@ -284,6 +284,34 @@ gb_connection_create_range(struct greybus_host_device *hd,
return NULL;
}
static int gb_connection_hd_cport_enable(struct gb_connection *connection)
{
struct greybus_host_device *hd = connection->hd;
int ret;
if (!hd->driver->cport_enable)
return 0;
ret = hd->driver->cport_enable(hd, connection->hd_cport_id);
if (ret) {
dev_err(&connection->dev,
"failed to enable host cport: %d\n", ret);
return ret;
}
return 0;
}
static void gb_connection_hd_cport_disable(struct gb_connection *connection)
{
struct greybus_host_device *hd = connection->hd;
if (!hd->driver->cport_disable)
return;
hd->driver->cport_disable(hd, connection->hd_cport_id);
}
struct gb_connection *gb_connection_create(struct gb_bundle *bundle,
u16 cport_id, u8 protocol_id)
{
@ -439,10 +467,14 @@ static int gb_connection_init(struct gb_connection *connection)
struct gb_protocol *protocol = connection->protocol;
int ret;
ret = gb_connection_svc_connection_create(connection);
ret = gb_connection_hd_cport_enable(connection);
if (ret)
return ret;
ret = gb_connection_svc_connection_create(connection);
if (ret)
goto err_hd_cport_disable;
ret = gb_connection_control_connected(connection);
if (ret)
goto err_svc_destroy;
@ -470,6 +502,8 @@ static int gb_connection_init(struct gb_connection *connection)
gb_connection_control_disconnected(connection);
err_svc_destroy:
gb_connection_svc_connection_destroy(connection);
err_hd_cport_disable:
gb_connection_hd_cport_disable(connection);
return ret;
}
@ -492,6 +526,7 @@ static void gb_connection_exit(struct gb_connection *connection)
connection->protocol->connection_exit(connection);
gb_connection_control_disconnected(connection);
gb_connection_svc_connection_destroy(connection);
gb_connection_hd_cport_disable(connection);
}
/*

2
drivers/staging/greybus/greybus.h
View File

@ -75,6 +75,8 @@ struct greybus_host_device;
struct greybus_host_driver {
size_t hd_priv_size;
int (*cport_enable)(struct greybus_host_device *hd, u16 cport_id);
int (*cport_disable)(struct greybus_host_device *hd, u16 cport_id);
void (*connection_create)(struct gb_connection *connection);
void (*connection_destroy)(struct gb_connection *connection);
int (*message_send)(struct greybus_host_device *hd, u16 dest_cport_id,