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greybus: hd/es2: add cport_connected callback and ARPC 

Add a host-device cport_connected callback, which will be called after a
connection has been created and that can be used by the host-device
driver to make sure its internal state is updated to match the CPort
attributes set by the SVC.

This callback will eventually replace the cport_features_enable
callback.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Sandeep Patil <sspatil@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2016-08-10 12:58:42 +02:00 committed by Greg Kroah-Hartman
parent b3136a77a4
commit a9dc1cf5b7
3 changed files with 27 additions and 0 deletions
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6
drivers/staging/greybus/arpc.h
View File

@ -77,9 +77,15 @@ struct arpc_response_message {
/* ARPC requests */
#define ARPC_TYPE_CPORT_RESET 0x00
#define ARPC_TYPE_CPORT_CONNECTED 0x01
struct arpc_cport_reset_req {
__le16 cport_id;
} __packed;
struct arpc_cport_connected_req {
__le16 cport_id;
} __packed;
#endif /* __ARPC_H */

20
drivers/staging/greybus/es2.c
View File

@ -746,6 +746,25 @@ static int cport_disable(struct gb_host_device *hd, u16 cport_id)
return 0;
}
static int es2_cport_connected(struct gb_host_device *hd, u16 cport_id)
{
struct es2_ap_dev *es2 = hd_to_es2(hd);
struct device *dev = &es2->usb_dev->dev;
struct arpc_cport_connected_req req;
int ret;
req.cport_id = cpu_to_le16(cport_id);
ret = arpc_sync(es2, ARPC_TYPE_CPORT_CONNECTED, &req, sizeof(req),
NULL, ES2_ARPC_CPORT_TIMEOUT);
if (ret) {
dev_err(dev, "failed to set connected state for cport %u: %d\n",
cport_id, ret);
return ret;
}
return 0;
}
static int latency_tag_enable(struct gb_host_device *hd, u16 cport_id)
{
int retval;
@ -930,6 +949,7 @@ static struct gb_hd_driver es2_driver = {
.cport_release = es2_cport_release,
.cport_enable = cport_enable,
.cport_disable = cport_disable,
.cport_connected = es2_cport_connected,
.latency_tag_enable = latency_tag_enable,
.latency_tag_disable = latency_tag_disable,
.output = output,

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

@ -22,6 +22,7 @@ struct gb_hd_driver {
int (*cport_enable)(struct gb_host_device *hd, u16 cport_id,
unsigned long flags);
int (*cport_disable)(struct gb_host_device *hd, u16 cport_id);
int (*cport_connected)(struct gb_host_device *hd, u16 cport_id);
int (*cport_flush)(struct gb_host_device *hd, u16 cport_id);
int (*cport_ping)(struct gb_host_device *hd, u16 cport_id);
int (*message_send)(struct gb_host_device *hd, u16 dest_cport_id,