From 5308a91b9fc1a8f94b860c2589b06908a97cba7e Mon Sep 17 00:00:00 2001 From: Sarah Sharp Date: Wed, 1 Dec 2010 11:34:59 -0800 Subject: xhci: Index with a port array instead of PORTSC addresses. In the upcoming patches, the roothub emulation code will need to return port status and port change buffers based on whether they are called with the xHCI USB 2.0 or USB 3.0 roothub. To facilitate that, make the roothub code index into an array of port addresses with wIndex, rather than calculating the address using the offset and the address of the PORTSC registers. Later we can set the port array to be the array of USB 3.0 port addresses, or the USB 2.0 port addresses, depending on the roothub passed in. Create a temporary (statically sized) port array and fill it in with both USB 3.0 and USB 2.0 port addresses. This is inefficient to do for every roothub call, but this is needed for git bisect compatibility. The temporary port array will be deleted in a subsequent patch. Signed-off-by: Sarah Sharp --- drivers/usb/host/xhci-ring.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) (limited to 'drivers/usb/host/xhci-ring.c') diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 47763bed378..582537689eb 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1161,9 +1161,11 @@ static void handle_port_status(struct xhci_hcd *xhci, struct usb_hcd *hcd = xhci_to_hcd(xhci); u32 port_id; u32 temp, temp1; - u32 __iomem *addr; int max_ports; int slot_id; + unsigned int faked_port_index; + u32 __iomem *port_array[15 + USB_MAXCHILDREN]; + int i; /* Port status change events always have a successful completion code */ if (GET_COMP_CODE(event->generic.field[2]) != COMP_SUCCESS) { @@ -1179,8 +1181,16 @@ static void handle_port_status(struct xhci_hcd *xhci, goto cleanup; } - addr = &xhci->op_regs->port_status_base + NUM_PORT_REGS * (port_id - 1); - temp = xhci_readl(xhci, addr); + for (i = 0; i < max_ports; i++) { + if (i < xhci->num_usb3_ports) + port_array[i] = xhci->usb3_ports[i]; + else + port_array[i] = + xhci->usb2_ports[i - xhci->num_usb3_ports]; + } + + faked_port_index = port_id; + temp = xhci_readl(xhci, port_array[faked_port_index]); if (hcd->state == HC_STATE_SUSPENDED) { xhci_dbg(xhci, "resume root hub\n"); usb_hcd_resume_root_hub(hcd); @@ -1200,7 +1210,7 @@ static void handle_port_status(struct xhci_hcd *xhci, temp = xhci_port_state_to_neutral(temp); temp &= ~PORT_PLS_MASK; temp |= PORT_LINK_STROBE | XDEV_U0; - xhci_writel(xhci, temp, addr); + xhci_writel(xhci, temp, port_array[faked_port_index]); slot_id = xhci_find_slot_id_by_port(xhci, port_id); if (!slot_id) { xhci_dbg(xhci, "slot_id is zero\n"); @@ -1209,10 +1219,10 @@ static void handle_port_status(struct xhci_hcd *xhci, xhci_ring_device(xhci, slot_id); xhci_dbg(xhci, "resume SS port %d finished\n", port_id); /* Clear PORT_PLC */ - temp = xhci_readl(xhci, addr); + temp = xhci_readl(xhci, port_array[faked_port_index]); temp = xhci_port_state_to_neutral(temp); temp |= PORT_PLC; - xhci_writel(xhci, temp, addr); + xhci_writel(xhci, temp, port_array[faked_port_index]); } else { xhci_dbg(xhci, "resume HS port %d\n", port_id); xhci->resume_done[port_id - 1] = jiffies + -- cgit v1.2.3-70-g09d2