From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/gadget/composite.c | 3 +--
drivers/usb/gadget/dbgp.c | 2 +-
drivers/usb/gadget/file_storage.c | 10 ++++++----
drivers/usb/gadget/gmidi.c | 3 +--
drivers/usb/gadget/inode.c | 5 ++---
drivers/usb/gadget/printer.c | 14 +++++++++-----
6 files changed, 20 insertions(+), 17 deletions(-)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index c5abe27..5ef8779 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -573,7 +573,7 @@ static void device_qual(struct usb_composite_dev *cdev)
qual->bDeviceSubClass = cdev->desc.bDeviceSubClass;
qual->bDeviceProtocol = cdev->desc.bDeviceProtocol;
/* ASSUME same EP0 fifo size at both speeds */
- qual->bMaxPacketSize0 = cdev->desc.bMaxPacketSize0;
+ qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket;
qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER);
qual->bRESERVED = 0;
}
@@ -1450,7 +1450,6 @@ static int composite_bind(struct usb_gadget *gadget)
goto fail;
cdev->desc = *composite->dev;
- cdev->desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
/* standardized runtime overrides for device ID data */
if (idVendor)
diff --git a/drivers/usb/gadget/dbgp.c b/drivers/usb/gadget/dbgp.c
index 052209e..8beefdd 100644
--- a/drivers/usb/gadget/dbgp.c
+++ b/drivers/usb/gadget/dbgp.c
@@ -314,7 +314,6 @@ static int __init dbgp_bind(struct usb_gadget *gadget)
dbgp.req->length = DBGP_REQ_EP0_LEN;
gadget->ep0->driver_data = gadget;
- device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
#ifdef CONFIG_USB_G_DBGP_SERIAL
dbgp.serial = kzalloc(sizeof(struct gserial), GFP_KERNEL);
@@ -365,6 +364,7 @@ static int dbgp_setup(struct usb_gadget *gadget,
dev_dbg(&dbgp.gadget->dev, "setup: desc device\n");
len = sizeof device_desc;
data = &device_desc;
+ device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
break;
case USB_DT_DEBUG:
dev_dbg(&dbgp.gadget->dev, "setup: desc debug\n");
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 738591a..639e14a 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;
diff --git a/drivers/usb/gadget/gmidi.c b/drivers/usb/gadget/gmidi.c
index 4f40f14..8b9220e 100644
--- a/drivers/usb/gadget/gmidi.c
+++ b/drivers/usb/gadget/gmidi.c
@@ -695,6 +695,7 @@ static int gmidi_setup(struct usb_gadget *gadget,
switch (w_value >> 8) {
case USB_DT_DEVICE:
+ device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
value = min(w_length, (u16) sizeof(device_desc));
memcpy(req->buf, &device_desc, value);
break;
@@ -1249,8 +1250,6 @@ autoconf_fail:
dev->req->complete = gmidi_setup_complete;
- device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
-
gadget->ep0->driver_data = dev;
INFO(dev, "%s, version: " DRIVER_VERSION "\n", longname);
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index a9a4556..1b24099 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -1347,7 +1347,7 @@ static void make_qualifier (struct dev_data *dev)
qual.bDeviceProtocol = desc->bDeviceProtocol;
/* assumes ep0 uses the same value for both speeds ... */
- qual.bMaxPacketSize0 = desc->bMaxPacketSize0;
+ qual.bMaxPacketSize0 = dev->gadget->ep0->maxpacket;
qual.bNumConfigurations = 1;
qual.bRESERVED = 0;
@@ -1404,7 +1404,6 @@ gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
}
dev->state = STATE_DEV_CONNECTED;
- dev->dev->bMaxPacketSize0 = gadget->ep0->maxpacket;
INFO (dev, "connected\n");
event = next_event (dev, GADGETFS_CONNECT);
@@ -1432,6 +1431,7 @@ gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
case USB_DT_DEVICE:
value = min (w_length, (u16) sizeof *dev->dev);
+ dev->dev->bMaxPacketSize0 = dev->gadget->ep0->maxpacket;
req->buf = dev->dev;
break;
#ifdef CONFIG_USB_GADGET_DUALSPEED
@@ -1712,7 +1712,6 @@ gadgetfs_bind (struct usb_gadget *gadget)
set_gadget_data (gadget, dev);
dev->gadget = gadget;
gadget->ep0->driver_data = dev;
- dev->dev->bMaxPacketSize0 = gadget->ep0->maxpacket;
/* preallocate control response and buffer */
dev->req = usb_ep_alloc_request (gadget->ep0, GFP_KERNEL);
diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index 00e5f19..d5df8dd 100644
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -1148,6 +1148,8 @@ printer_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
switch (wValue >> 8) {
case USB_DT_DEVICE:
+ device_desc.bMaxPacketSize0 =
+ gadget->ep0->maxpacket;
value = min(wLength, (u16) sizeof device_desc);
memcpy(req->buf, &device_desc, value);
break;
@@ -1155,6 +1157,12 @@ printer_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
case USB_DT_DEVICE_QUALIFIER:
if (!gadget->is_dualspeed)
break;
+ /*
+ * assumes ep0 uses the same value for both
+ * speeds
+ */
+ dev_qualifier.bMaxPacketSize0 =
+ gadget->ep0->maxpacket;
value = min(wLength,
(u16) sizeof dev_qualifier);
memcpy(req->buf, &dev_qualifier, value);
@@ -1450,15 +1458,11 @@ autoconf_fail:
out_ep->driver_data = out_ep; /* claim */
#ifdef CONFIG_USB_GADGET_DUALSPEED
- /* assumes ep0 uses the same value for both speeds ... */
- dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
-
- /* and that all endpoints are dual-speed */
+ /* assumes that all endpoints are dual-speed */
hs_ep_in_desc.bEndpointAddress = fs_ep_in_desc.bEndpointAddress;
hs_ep_out_desc.bEndpointAddress = fs_ep_out_desc.bEndpointAddress;
#endif /* DUALSPEED */
- device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
usb_gadget_set_selfpowered(gadget);
if (gadget->is_otg) {
--
1.7.6
--
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