diff options
| author | Johan Hovold <johan@hovoldconsulting.com> | 2016-06-22 11:42:05 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2016-06-24 16:22:30 -0700 |
| commit | 74ec7598b51fb347a1273f8deea42883ae725e6e (patch) | |
| tree | 975d02fb903cb2600e6c33dd09a35f512819a114 /drivers/staging/greybus/es2.c | |
| parent | 3094f9477301ec477fed2a43fef68c43e70e72ce (diff) | |
greybus: es2: add support for greybus cport flags
Add support for Greybus CPort flags that are sent to the bridge through
a new USB vendor request when enabling a CPort as part of connection
establishment.
Currently the Greybus control and high-priority connection flags are
recognised and forwarded to APBA.
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers/staging/greybus/es2.c')
| -rw-r--r-- | drivers/staging/greybus/es2.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/staging/greybus/es2.c b/drivers/staging/greybus/es2.c index 89fe7641cd24..22174450a8b3 100644 --- a/drivers/staging/greybus/es2.c +++ b/drivers/staging/greybus/es2.c @@ -607,6 +607,47 @@ static void es2_cport_release(struct gb_host_device *hd, u16 cport_id) ida_simple_remove(&hd->cport_id_map, cport_id); } +static int cport_enable(struct gb_host_device *hd, u16 cport_id, + unsigned long flags) +{ + struct es2_ap_dev *es2 = hd_to_es2(hd); + struct usb_device *udev = es2->usb_dev; + struct gb_apb_request_cport_flags *req; + int ret; + + req = kzalloc(sizeof(*req), GFP_KERNEL); + if (!req) + return -ENOMEM; + + if (flags & GB_CONNECTION_FLAG_CONTROL) + req->flags |= GB_APB_CPORT_FLAG_CONTROL; + if (flags & GB_CONNECTION_FLAG_HIGH_PRIO) + req->flags |= GB_APB_CPORT_FLAG_HIGH_PRIO; + + dev_dbg(&hd->dev, "%s - cport = %u, flags = %02x\n", __func__, + cport_id, req->flags); + + ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), + GB_APB_REQUEST_CPORT_FLAGS, + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_INTERFACE, cport_id, 0, + req, sizeof(*req), ES2_TIMEOUT); + if (ret != sizeof(*req)) { + dev_err(&udev->dev, "failed to set cport flags for port %d\n", + cport_id); + if (ret >= 0) + ret = -EIO; + + goto out; + } + + ret = 0; +out: + kfree(req); + + return ret; +} + static int cport_disable(struct gb_host_device *hd, u16 cport_id) { int retval; @@ -799,6 +840,7 @@ static struct gb_hd_driver es2_driver = { .message_cancel = message_cancel, .cport_allocate = es2_cport_allocate, .cport_release = es2_cport_release, + .cport_enable = cport_enable, .cport_disable = cport_disable, .latency_tag_enable = latency_tag_enable, .latency_tag_disable = latency_tag_disable, |