ep0_ctx->deq |= ep_ring->cycle_state;
}
+/*
+ * The xHCI roothub may have ports of differing speeds in any order in the port
+ * status registers. xhci->port_array provides an array of the port speed for
+ * each offset into the port status registers.
+ *
+ * The xHCI hardware wants to know the roothub port number that the USB device
+ * is attached to (or the roothub port its ancestor hub is attached to). All we
+ * know is the index of that port under either the USB 2.0 or the USB 3.0
+ * roothub, but that doesn't give us the real index into the HW port status
+ * registers. Scan through the xHCI roothub port array, looking for the Nth
+ * entry of the correct port speed. Return the port number of that entry.
+ */
+static u32 xhci_find_real_port_number(struct xhci_hcd *xhci,
+ struct usb_device *udev)
+{
+ struct usb_device *top_dev;
+ unsigned int num_similar_speed_ports;
+ unsigned int faked_port_num;
+ int i;
+
+ for (top_dev = udev; top_dev->parent && top_dev->parent->parent;
+ top_dev = top_dev->parent)
+ /* Found device below root hub */;
+ faked_port_num = top_dev->portnum;
+ for (i = 0, num_similar_speed_ports = 0;
+ i < HCS_MAX_PORTS(xhci->hcs_params1); i++) {
+ u8 port_speed = xhci->port_array[i];
+
+ /*
+ * Skip ports that don't have known speeds, or have duplicate
+ * Extended Capabilities port speed entries.
+ */
+ if (port_speed == 0 || port_speed == DUPLICATE_ENTRY)
+ continue;
+
+ /*
+ * USB 3.0 ports are always under a USB 3.0 hub. USB 2.0 and
+ * 1.1 ports are under the USB 2.0 hub. If the port speed
+ * matches the device speed, it's a similar speed port.
+ */
+ if ((port_speed == 0x03) == (udev->speed == USB_SPEED_SUPER))
+ num_similar_speed_ports++;
+ if (num_similar_speed_ports == faked_port_num)
+ /* Roothub ports are numbered from 1 to N */
+ return i+1;
+ }
+ return 0;
+}
+
/* Setup an xHCI virtual device for a Set Address command */
int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev)
{
struct xhci_virt_device *dev;
struct xhci_ep_ctx *ep0_ctx;
- struct usb_device *top_dev;
struct xhci_slot_ctx *slot_ctx;
struct xhci_input_control_ctx *ctrl_ctx;
+ u32 port_num;
+ struct usb_device *top_dev;
dev = xhci->devs[udev->slot_id];
/* Slot ID 0 is reserved */
BUG();
}
/* Find the root hub port this device is under */
+ port_num = xhci_find_real_port_number(xhci, udev);
+ if (!port_num)
+ return -EINVAL;
+ slot_ctx->dev_info2 |= (u32) ROOT_HUB_PORT(port_num);
+ /* Set the port number in the virtual_device to the faked port number */
for (top_dev = udev; top_dev->parent && top_dev->parent->parent;
top_dev = top_dev->parent)
/* Found device below root hub */;
- slot_ctx->dev_info2 |= (u32) ROOT_HUB_PORT(top_dev->portnum);
dev->port = top_dev->portnum;
- xhci_dbg(xhci, "Set root hub portnum to %d\n", top_dev->portnum);
+ xhci_dbg(xhci, "Set root hub portnum to %d\n", port_num);
+ xhci_dbg(xhci, "Set fake root hub portnum to %d\n", dev->port);
- /* Is this a LS/FS device under a HS hub? */
- if ((udev->speed == USB_SPEED_LOW || udev->speed == USB_SPEED_FULL) &&
- udev->tt) {
+ /* Is this a LS/FS device under an external HS hub? */
+ if (udev->tt && udev->tt->hub->parent) {
slot_ctx->tt_info = udev->tt->hub->slot_id;
slot_ctx->tt_info |= udev->ttport << 8;
if (udev->tt->multi)
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
* 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;
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();
}
* 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 ||
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;
* 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)
{
xhci->page_size = 0;
xhci->page_shift = 0;
- xhci->bus_suspended = 0;
+ xhci->bus_state[0].bus_suspended = 0;
+ xhci->bus_state[1].bus_suspended = 0;
}
static int xhci_test_trb_in_td(struct xhci_hcd *xhci,
* 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;
}
xhci_dbg(xhci, "Found %u USB 2.0 ports and %u USB 3.0 ports.\n",
xhci->num_usb2_ports, xhci->num_usb3_ports);
+
+ /* Place limits on the number of roothub ports so that the hub
+ * descriptors aren't longer than the USB core will allocate.
+ */
+ if (xhci->num_usb3_ports > 15) {
+ xhci_dbg(xhci, "Limiting USB 3.0 roothub ports to 15.\n");
+ xhci->num_usb3_ports = 15;
+ }
+ if (xhci->num_usb2_ports > USB_MAXCHILDREN) {
+ xhci_dbg(xhci, "Limiting USB 2.0 roothub ports to %u.\n",
+ USB_MAXCHILDREN);
+ xhci->num_usb2_ports = USB_MAXCHILDREN;
+ }
+
/*
* Note we could have all USB 3.0 ports, or all USB 2.0 ports.
* Not sure how the USB core will handle a hub with no ports...
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] =
"addr = %p\n", i,
xhci->usb2_ports[port_index]);
port_index++;
+ if (port_index == xhci->num_usb2_ports)
+ break;
}
}
if (xhci->num_usb3_ports) {
"addr = %p\n", i,
xhci->usb3_ports[port_index]);
port_index++;
+ if (port_index == xhci->num_usb3_ports)
+ break;
}
}
return 0;
init_completion(&xhci->addr_dev);
for (i = 0; i < MAX_HC_SLOTS; ++i)
xhci->devs[i] = NULL;
- for (i = 0; i < MAX_HC_PORTS; ++i)
- xhci->resume_done[i] = 0;
+ for (i = 0; i < USB_MAXCHILDREN; ++i) {
+ xhci->bus_state[0].resume_done[i] = 0;
+ xhci->bus_state[1].resume_done[i] = 0;
+ }
if (scratchpad_alloc(xhci, flags))
goto fail;
projects / ~andy / linux / blobdiff