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greybus: hd/es2: add cport_clear callback and ARPC 

Add a host-device cport_clear callback, which will be called as part
of the new connection tear-down sequence to reset the CPort state.

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 12:58:44 +02:00 committed by Greg Kroah-Hartman
parent 0e7cd0d259
commit 6471c0039c
3 changed files with 26 additions and 0 deletions
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5
drivers/staging/greybus/arpc.h
View File

@ -79,6 +79,7 @@ struct arpc_response_message {
#define ARPC_TYPE_CPORT_RESET 0x00
#define ARPC_TYPE_CPORT_CONNECTED 0x01
#define ARPC_TYPE_CPORT_QUIESCE 0x02
#define ARPC_TYPE_CPORT_CLEAR 0x03
struct arpc_cport_reset_req {
__le16 cport_id;
@ -94,5 +95,9 @@ struct arpc_cport_quiesce_req {
__le16 timeout;
} __packed;
struct arpc_cport_clear_req {
__le16 cport_id;
} __packed;
#endif /* __ARPC_H */

19
drivers/staging/greybus/es2.c
View File

@ -794,6 +794,24 @@ static int es2_cport_quiesce(struct gb_host_device *hd, u16 cport_id,
return 0;
}
static int es2_cport_clear(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_clear_req req;
int ret;
req.cport_id = cpu_to_le16(cport_id);
ret = arpc_sync(es2, ARPC_TYPE_CPORT_CLEAR, &req, sizeof(req),
NULL, ES2_ARPC_CPORT_TIMEOUT);
if (ret) {
dev_err(dev, "failed to clear 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;
@ -980,6 +998,7 @@ static struct gb_hd_driver es2_driver = {
.cport_disable = cport_disable,
.cport_connected = es2_cport_connected,
.cport_quiesce = es2_cport_quiesce,
.cport_clear = es2_cport_clear,
.latency_tag_enable = latency_tag_enable,
.latency_tag_disable = latency_tag_disable,
.output = output,

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

@ -27,6 +27,8 @@ struct gb_hd_driver {
int (*cport_ping)(struct gb_host_device *hd, u16 cport_id);
int (*cport_quiesce)(struct gb_host_device *hd, u16 cport_id,
size_t peer_space, unsigned int timeout);
int (*cport_clear)(struct gb_host_device *hd, u16 cport_id);
int (*message_send)(struct gb_host_device *hd, u16 dest_cport_id,
struct gb_message *message, gfp_t gfp_mask);
void (*message_cancel)(struct gb_message *message);