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path: root/drivers/usb/host/xhci-mem.c
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Diffstat (limited to 'drivers/usb/host/xhci-mem.c')
-rw-r--r--drivers/usb/host/xhci-mem.c106
1 files changed, 70 insertions, 36 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index a003e79aacd..627f3438028 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -846,7 +846,7 @@ static u32 xhci_find_real_port_number(struct xhci_hcd *xhci,
* Skip ports that don't have known speeds, or have duplicate
* Extended Capabilities port speed entries.
*/
- if (port_speed == 0 || port_speed == -1)
+ if (port_speed == 0 || port_speed == DUPLICATE_ENTRY)
continue;
/*
@@ -974,6 +974,47 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
return 0;
}
+/*
+ * Convert interval expressed as 2^(bInterval - 1) == interval into
+ * straight exponent value 2^n == interval.
+ *
+ */
+static unsigned int xhci_parse_exponent_interval(struct usb_device *udev,
+ struct usb_host_endpoint *ep)
+{
+ unsigned int interval;
+
+ interval = clamp_val(ep->desc.bInterval, 1, 16) - 1;
+ if (interval != ep->desc.bInterval - 1)
+ dev_warn(&udev->dev,
+ "ep %#x - rounding interval to %d microframes\n",
+ ep->desc.bEndpointAddress,
+ 1 << interval);
+
+ return interval;
+}
+
+/*
+ * Convert bInterval expressed in frames (in 1-255 range) to exponent of
+ * microframes, rounded down to nearest power of 2.
+ */
+static unsigned int xhci_parse_frame_interval(struct usb_device *udev,
+ struct usb_host_endpoint *ep)
+{
+ unsigned int interval;
+
+ interval = fls(8 * ep->desc.bInterval) - 1;
+ interval = clamp_val(interval, 3, 10);
+ if ((1 << interval) != 8 * ep->desc.bInterval)
+ dev_warn(&udev->dev,
+ "ep %#x - rounding interval to %d microframes, ep desc says %d microframes\n",
+ ep->desc.bEndpointAddress,
+ 1 << interval,
+ 8 * ep->desc.bInterval);
+
+ return interval;
+}
+
/* Return the polling or NAK interval.
*
* The polling interval is expressed in "microframes". If xHCI's Interval field
@@ -982,7 +1023,7 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
* The NAK interval is one NAK per 1 to 255 microframes, or no NAKs if interval
* is set to 0.
*/
-static inline unsigned int xhci_get_endpoint_interval(struct usb_device *udev,
+static unsigned int xhci_get_endpoint_interval(struct usb_device *udev,
struct usb_host_endpoint *ep)
{
unsigned int interval = 0;
@@ -991,45 +1032,38 @@ static inline unsigned int xhci_get_endpoint_interval(struct usb_device *udev,
case USB_SPEED_HIGH:
/* Max NAK rate */
if (usb_endpoint_xfer_control(&ep->desc) ||
- usb_endpoint_xfer_bulk(&ep->desc))
+ usb_endpoint_xfer_bulk(&ep->desc)) {
interval = ep->desc.bInterval;
+ break;
+ }
/* Fall through - SS and HS isoc/int have same decoding */
+
case USB_SPEED_SUPER:
if (usb_endpoint_xfer_int(&ep->desc) ||
- usb_endpoint_xfer_isoc(&ep->desc)) {
- if (ep->desc.bInterval == 0)
- interval = 0;
- else
- interval = ep->desc.bInterval - 1;
- if (interval > 15)
- interval = 15;
- if (interval != ep->desc.bInterval + 1)
- dev_warn(&udev->dev, "ep %#x - rounding interval to %d microframes\n",
- ep->desc.bEndpointAddress, 1 << interval);
+ usb_endpoint_xfer_isoc(&ep->desc)) {
+ interval = xhci_parse_exponent_interval(udev, ep);
}
break;
- /* Convert bInterval (in 1-255 frames) to microframes and round down to
- * nearest power of 2.
- */
+
case USB_SPEED_FULL:
+ if (usb_endpoint_xfer_int(&ep->desc)) {
+ interval = xhci_parse_exponent_interval(udev, ep);
+ break;
+ }
+ /*
+ * Fall through for isochronous endpoint interval decoding
+ * since it uses the same rules as low speed interrupt
+ * endpoints.
+ */
+
case USB_SPEED_LOW:
if (usb_endpoint_xfer_int(&ep->desc) ||
- usb_endpoint_xfer_isoc(&ep->desc)) {
- interval = fls(8*ep->desc.bInterval) - 1;
- if (interval > 10)
- interval = 10;
- if (interval < 3)
- interval = 3;
- if ((1 << interval) != 8*ep->desc.bInterval)
- dev_warn(&udev->dev,
- "ep %#x - rounding interval"
- " to %d microframes, "
- "ep desc says %d microframes\n",
- ep->desc.bEndpointAddress,
- 1 << interval,
- 8*ep->desc.bInterval);
+ usb_endpoint_xfer_isoc(&ep->desc)) {
+
+ interval = xhci_parse_frame_interval(udev, ep);
}
break;
+
default:
BUG();
}
@@ -1041,7 +1075,7 @@ static inline unsigned int xhci_get_endpoint_interval(struct usb_device *udev,
* transaction opportunities per microframe", but that goes in the Max Burst
* endpoint context field.
*/
-static inline u32 xhci_get_endpoint_mult(struct usb_device *udev,
+static u32 xhci_get_endpoint_mult(struct usb_device *udev,
struct usb_host_endpoint *ep)
{
if (udev->speed != USB_SPEED_SUPER ||
@@ -1050,7 +1084,7 @@ static inline u32 xhci_get_endpoint_mult(struct usb_device *udev,
return ep->ss_ep_comp.bmAttributes;
}
-static inline u32 xhci_get_endpoint_type(struct usb_device *udev,
+static u32 xhci_get_endpoint_type(struct usb_device *udev,
struct usb_host_endpoint *ep)
{
int in;
@@ -1084,7 +1118,7 @@ static inline u32 xhci_get_endpoint_type(struct usb_device *udev,
* Basically, this is the maxpacket size, multiplied by the burst size
* and mult size.
*/
-static inline u32 xhci_get_max_esit_payload(struct xhci_hcd *xhci,
+static u32 xhci_get_max_esit_payload(struct xhci_hcd *xhci,
struct usb_device *udev,
struct usb_host_endpoint *ep)
{
@@ -1727,12 +1761,12 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports,
* found a similar duplicate.
*/
if (xhci->port_array[i] != major_revision &&
- xhci->port_array[i] != (u8) -1) {
+ xhci->port_array[i] != DUPLICATE_ENTRY) {
if (xhci->port_array[i] == 0x03)
xhci->num_usb3_ports--;
else
xhci->num_usb2_ports--;
- xhci->port_array[i] = (u8) -1;
+ xhci->port_array[i] = DUPLICATE_ENTRY;
}
/* FIXME: Should we disable the port? */
continue;
@@ -1831,7 +1865,7 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags)
for (i = 0; i < num_ports; i++) {
if (xhci->port_array[i] == 0x03 ||
xhci->port_array[i] == 0 ||
- xhci->port_array[i] == -1)
+ xhci->port_array[i] == DUPLICATE_ENTRY)
continue;
xhci->usb2_ports[port_index] =
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 04:06:17 +0000