diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2011-06-23 14:26:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-07-01 14:31:12 -0700 |
| commit | 765f5b830e547229bb752e7b232ee83e2b3d49d5 (patch) | |
| tree | ffa37920a165fd3a964b7e0f333f6509d3e59de3 /drivers/usb/gadget/file_storage.c | |
| parent | 193ab2a6070039e7ee2b9b9bebea754a7c52fd1b (diff) | |
usb: gadget: defer setting maxpacket till ->setup()
maxpacket is set by the udc driver for ep0 very early. This value is
copied by the function gadget used later for the USB_DT_DEVICE and
USB_DT_DEVICE_QUALIFIER query. This seems to work fine so far. For USB3
we need set a different value here. In SS speed it is 2^x with x=9 and
in HS we set something <= 64. If the UDC starts in SS and continues in
HS after the cable has been plugged it will report a too small value.
There setting of this value is defered and taken automaticly from the
ep0 pointer where the UDC driver can update it according to the speed it
detected _after_ a cable has been plugged.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget/file_storage.c')
| -rw-r--r-- | drivers/usb/gadget/file_storage.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c index 738591a64bb4..639e14a2fd15 100644 --- a/drivers/usb/gadget/file_storage.c +++ b/drivers/usb/gadget/file_storage.c @@ -929,6 +929,7 @@ static int standard_setup_req(struct fsg_dev *fsg, case USB_DT_DEVICE: VDBG(fsg, "get device descriptor\n"); + device_desc.bMaxPacketSize0 = fsg->ep0->maxpacket; value = sizeof device_desc; memcpy(req->buf, &device_desc, value); break; @@ -936,6 +937,11 @@ static int standard_setup_req(struct fsg_dev *fsg, VDBG(fsg, "get device qualifier\n"); if (!gadget_is_dualspeed(fsg->gadget)) break; + /* + * Assume ep0 uses the same maxpacket value for both + * speeds + */ + dev_qualifier.bMaxPacketSize0 = fsg->ep0->maxpacket; value = sizeof dev_qualifier; memcpy(req->buf, &dev_qualifier, value); break; @@ -3417,7 +3423,6 @@ static int __init fsg_bind(struct usb_gadget *gadget) } /* Fix up the descriptors */ - device_desc.bMaxPacketSize0 = fsg->ep0->maxpacket; device_desc.idVendor = cpu_to_le16(mod_data.vendor); device_desc.idProduct = cpu_to_le16(mod_data.product); device_desc.bcdDevice = cpu_to_le16(mod_data.release); @@ -3431,9 +3436,6 @@ static int __init fsg_bind(struct usb_gadget *gadget) if (gadget_is_dualspeed(gadget)) { fsg_hs_function[i + FSG_HS_FUNCTION_PRE_EP_ENTRIES] = NULL; - /* Assume ep0 uses the same maxpacket value for both speeds */ - dev_qualifier.bMaxPacketSize0 = fsg->ep0->maxpacket; - /* Assume endpoint addresses are the same for both speeds */ fsg_hs_bulk_in_desc.bEndpointAddress = fsg_fs_bulk_in_desc.bEndpointAddress; |