From: Marek Vasut <marex@denx.de>
Date: Sat, 23 Jan 2016 20:04:46 +0000 (+0100)
Subject: usb: ehci: Implement V2P mapping
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=cf7c93cdd75570fe6f75d04177b94a84146f5e46;p=u-boot.git

usb: ehci: Implement V2P mapping

Certain processor architectures, like MIPS, require that the USB
structures and transfer buffers are passed with their PA to the
USB controller. If VA is passed, the USB will not work. Add the
necessary virt_to_phys() calls into the USB EHCI code to make it
work.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Hans de Goede <hdegoede@redhat.com>
---

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index c664b1629e..b3eb08d506 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -245,7 +245,7 @@ static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 
 	idx = 0;
 	while (idx < QT_BUFFER_CNT) {
-		td->qt_buffer[idx] = cpu_to_hc32(addr);
+		td->qt_buffer[idx] = cpu_to_hc32(virt_to_phys((void *)addr));
 		td->qt_buffer_hi[idx] = 0;
 		next = (addr + EHCI_PAGE_SIZE) & ~(EHCI_PAGE_SIZE - 1);
 		delta = next - addr;
@@ -398,7 +398,7 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 	 *   qh_overlay.qt_next ...... 13-10 H
 	 * - qh_overlay.qt_altnext
 	 */
-	qh->qh_link = cpu_to_hc32((unsigned long)&ctrl->qh_list | QH_LINK_TYPE_QH);
+	qh->qh_link = cpu_to_hc32(virt_to_phys(&ctrl->qh_list) | QH_LINK_TYPE_QH);
 	c = (dev->speed != USB_SPEED_HIGH) && !usb_pipeendpoint(pipe);
 	maxpacket = usb_maxpacket(dev, pipe);
 	endpt = QH_ENDPT1_RL(8) | QH_ENDPT1_C(c) |
@@ -415,7 +415,6 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 	qh->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
 
 	tdp = &qh->qh_overlay.qt_next;
-
 	if (req != NULL) {
 		/*
 		 * Setup request qTD (3.5 in ehci-r10.pdf)
@@ -438,7 +437,7 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 			goto fail;
 		}
 		/* Update previous qTD! */
-		*tdp = cpu_to_hc32((unsigned long)&qtd[qtd_counter]);
+		*tdp = cpu_to_hc32(virt_to_phys(&qtd[qtd_counter]));
 		tdp = &qtd[qtd_counter++].qt_next;
 		toggle = 1;
 	}
@@ -497,7 +496,7 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 				goto fail;
 			}
 			/* Update previous qTD! */
-			*tdp = cpu_to_hc32((unsigned long)&qtd[qtd_counter]);
+			*tdp = cpu_to_hc32(virt_to_phys(&qtd[qtd_counter]));
 			tdp = &qtd[qtd_counter++].qt_next;
 			/*
 			 * Data toggle has to be adjusted since the qTD transfer
@@ -528,11 +527,11 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 			QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE);
 		qtd[qtd_counter].qt_token = cpu_to_hc32(token);
 		/* Update previous qTD! */
-		*tdp = cpu_to_hc32((unsigned long)&qtd[qtd_counter]);
+		*tdp = cpu_to_hc32(virt_to_phys(&qtd[qtd_counter]));
 		tdp = &qtd[qtd_counter++].qt_next;
 	}
 
-	ctrl->qh_list.qh_link = cpu_to_hc32((unsigned long)qh | QH_LINK_TYPE_QH);
+	ctrl->qh_list.qh_link = cpu_to_hc32(virt_to_phys(qh) | QH_LINK_TYPE_QH);
 
 	/* Flush dcache */
 	flush_dcache_range((unsigned long)&ctrl->qh_list,
@@ -542,7 +541,7 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 			   ALIGN_END_ADDR(struct qTD, qtd, qtd_count));
 
 	/* Set async. queue head pointer. */
-	ehci_writel(&ctrl->hcor->or_asynclistaddr, (unsigned long)&ctrl->qh_list);
+	ehci_writel(&ctrl->hcor->or_asynclistaddr, virt_to_phys(&ctrl->qh_list));
 
 	usbsts = ehci_readl(&ctrl->hcor->or_usbsts);
 	ehci_writel(&ctrl->hcor->or_usbsts, (usbsts & 0x3f));
@@ -989,7 +988,7 @@ static int ehci_common_init(struct ehci_ctrl *ctrl, uint tweaks)
 
 	/* Set head of reclaim list */
 	memset(qh_list, 0, sizeof(*qh_list));
-	qh_list->qh_link = cpu_to_hc32((unsigned long)qh_list | QH_LINK_TYPE_QH);
+	qh_list->qh_link = cpu_to_hc32(virt_to_phys(qh_list) | QH_LINK_TYPE_QH);
 	qh_list->qh_endpt1 = cpu_to_hc32(QH_ENDPT1_H(1) |
 						QH_ENDPT1_EPS(USB_SPEED_HIGH));
 	qh_list->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE);
@@ -1001,7 +1000,7 @@ static int ehci_common_init(struct ehci_ctrl *ctrl, uint tweaks)
 			   ALIGN_END_ADDR(struct QH, qh_list, 1));
 
 	/* Set async. queue head pointer. */
-	ehci_writel(&ctrl->hcor->or_asynclistaddr, (unsigned long)qh_list);
+	ehci_writel(&ctrl->hcor->or_asynclistaddr, virt_to_phys(qh_list));
 
 	/*
 	 * Set up periodic list