diff options
Diffstat (limited to 'drivers/usb/host/xhci-mem.c')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 174 |
1 files changed, 173 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 6ff2e298bff..8cd55f03ea2 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -103,7 +103,7 @@ static void xhci_link_segments(struct xhci_hcd *xhci, struct xhci_segment *prev, } /* XXX: Do we need the hcd structure in all these functions? */ -static void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring) +void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring) { struct xhci_segment *seg; struct xhci_segment *first_seg; @@ -257,6 +257,8 @@ int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id, if (!dev->ep_rings[0]) goto fail; + init_completion(&dev->cmd_completion); + /* * Point to output device context in dcbaa; skip the output control * context, which is eight 32 bit fields (or 32 bytes long) @@ -366,6 +368,176 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud return 0; } +/* Return the polling or NAK interval. + * + * The polling interval is expressed in "microframes". If xHCI's Interval field + * is set to N, it will service the endpoint every 2^(Interval)*125us. + * + * 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, + struct usb_host_endpoint *ep) +{ + unsigned int interval = 0; + + switch (udev->speed) { + case USB_SPEED_HIGH: + /* Max NAK rate */ + if (usb_endpoint_xfer_control(&ep->desc) || + usb_endpoint_xfer_bulk(&ep->desc)) + interval = ep->desc.bInterval; + /* 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); + } + break; + /* Convert bInterval (in 1-255 frames) to microframes and round down to + * nearest power of 2. + */ + case USB_SPEED_FULL: + 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\n", + ep->desc.bEndpointAddress, 1 << interval); + } + break; + default: + BUG(); + } + return EP_INTERVAL(interval); +} + +static inline u32 xhci_get_endpoint_type(struct usb_device *udev, + struct usb_host_endpoint *ep) +{ + int in; + u32 type; + + in = usb_endpoint_dir_in(&ep->desc); + if (usb_endpoint_xfer_control(&ep->desc)) { + type = EP_TYPE(CTRL_EP); + } else if (usb_endpoint_xfer_bulk(&ep->desc)) { + if (in) + type = EP_TYPE(BULK_IN_EP); + else + type = EP_TYPE(BULK_OUT_EP); + } else if (usb_endpoint_xfer_isoc(&ep->desc)) { + if (in) + type = EP_TYPE(ISOC_IN_EP); + else + type = EP_TYPE(ISOC_OUT_EP); + } else if (usb_endpoint_xfer_int(&ep->desc)) { + if (in) + type = EP_TYPE(INT_IN_EP); + else + type = EP_TYPE(INT_OUT_EP); + } else { + BUG(); + } + return type; +} + +int xhci_endpoint_init(struct xhci_hcd *xhci, + struct xhci_virt_device *virt_dev, + struct usb_device *udev, + struct usb_host_endpoint *ep) +{ + unsigned int ep_index; + struct xhci_ep_ctx *ep_ctx; + struct xhci_ring *ep_ring; + unsigned int max_packet; + unsigned int max_burst; + + ep_index = xhci_get_endpoint_index(&ep->desc); + ep_ctx = &virt_dev->in_ctx->ep[ep_index]; + + /* Set up the endpoint ring */ + virt_dev->new_ep_rings[ep_index] = xhci_ring_alloc(xhci, 1, true, GFP_KERNEL); + if (!virt_dev->new_ep_rings[ep_index]) + return -ENOMEM; + ep_ring = virt_dev->new_ep_rings[ep_index]; + ep_ctx->deq[1] = 0; + ep_ctx->deq[0] = ep_ring->first_seg->dma | ep_ring->cycle_state; + + ep_ctx->ep_info = xhci_get_endpoint_interval(udev, ep); + + /* FIXME dig Mult and streams info out of ep companion desc */ + + /* Allow 3 retries for everything but isoc */ + if (!usb_endpoint_xfer_isoc(&ep->desc)) + ep_ctx->ep_info2 = ERROR_COUNT(3); + else + ep_ctx->ep_info2 = ERROR_COUNT(0); + + ep_ctx->ep_info2 |= xhci_get_endpoint_type(udev, ep); + + /* Set the max packet size and max burst */ + switch (udev->speed) { + case USB_SPEED_SUPER: + max_packet = ep->desc.wMaxPacketSize; + ep_ctx->ep_info2 |= MAX_PACKET(max_packet); + /* FIXME dig out burst from ep companion desc */ + break; + case USB_SPEED_HIGH: + /* bits 11:12 specify the number of additional transaction + * opportunities per microframe (USB 2.0, section 9.6.6) + */ + if (usb_endpoint_xfer_isoc(&ep->desc) || + usb_endpoint_xfer_int(&ep->desc)) { + max_burst = (ep->desc.wMaxPacketSize & 0x1800) >> 11; + ep_ctx->ep_info2 |= MAX_BURST(max_burst); + } + /* Fall through */ + case USB_SPEED_FULL: + case USB_SPEED_LOW: + max_packet = ep->desc.wMaxPacketSize & 0x3ff; + ep_ctx->ep_info2 |= MAX_PACKET(max_packet); + break; + default: + BUG(); + } + /* FIXME Debug endpoint context */ + return 0; +} + +void xhci_endpoint_zero(struct xhci_hcd *xhci, + struct xhci_virt_device *virt_dev, + struct usb_host_endpoint *ep) +{ + unsigned int ep_index; + struct xhci_ep_ctx *ep_ctx; + + ep_index = xhci_get_endpoint_index(&ep->desc); + ep_ctx = &virt_dev->in_ctx->ep[ep_index]; + + ep_ctx->ep_info = 0; + ep_ctx->ep_info2 = 0; + ep_ctx->deq[1] = 0; + ep_ctx->deq[0] = 0; + ep_ctx->tx_info = 0; + /* Don't free the endpoint ring until the set interface or configuration + * request succeeds. + */ +} + void xhci_mem_cleanup(struct xhci_hcd *xhci) { struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |