X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=drivers%2Fusb%2Fhost%2Fehci-hcd.c;h=17187caed4827841615bf2f3a66b915bb291a131;hb=eb63218b9b95a59baa8b241f3a88e4415dabf833;hp=fdad739724eacb545817ebaf8128bdba96a82c91;hpb=8bc3603675f7bf4dfa4eb6bdaf2aa0a8ddce9fa6;p=oweals%2Fu-boot.git

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index fdad739724..17187caed4 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -36,6 +36,12 @@
 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
 #endif
 
+/*
+ * EHCI spec page 20 says that the HC may take up to 16 uFrames (= 4ms) to halt.
+ * Let's time out after 8 to have a little safety margin on top of that.
+ */
+#define HCHALT_TIMEOUT (8 * 1000)
+
 static struct ehci_ctrl ehcic[CONFIG_USB_MAX_CONTROLLER_COUNT];
 
 #define ALIGN_END_ADDR(type, ptr, size)			\
@@ -190,6 +196,39 @@ out:
 	return ret;
 }
 
+static int ehci_shutdown(struct ehci_ctrl *ctrl)
+{
+	int i, ret = 0;
+	uint32_t cmd, reg;
+
+	if (!ctrl || !ctrl->hcor)
+		return -EINVAL;
+
+	cmd = ehci_readl(&ctrl->hcor->or_usbcmd);
+	cmd &= ~(CMD_PSE | CMD_ASE);
+	ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
+	ret = handshake(&ctrl->hcor->or_usbsts, STS_ASS | STS_PSS, 0,
+		100 * 1000);
+
+	if (!ret) {
+		for (i = 0; i < CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS; i++) {
+			reg = ehci_readl(&ctrl->hcor->or_portsc[i]);
+			reg |= EHCI_PS_SUSP;
+			ehci_writel(&ctrl->hcor->or_portsc[i], reg);
+		}
+
+		cmd &= ~CMD_RUN;
+		ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
+		ret = handshake(&ctrl->hcor->or_usbsts, STS_HALT, STS_HALT,
+			HCHALT_TIMEOUT);
+	}
+
+	if (ret)
+		puts("EHCI failed to shut down host controller.\n");
+
+	return ret;
+}
+
 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz)
 {
 	uint32_t delta, next;
@@ -808,6 +847,7 @@ ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 			}
 			break;
 		case USB_PORT_FEAT_TEST:
+			ehci_shutdown(ctrl);
 			reg &= ~(0xf << 16);
 			reg |= ((le16_to_cpu(req->index) >> 8) & 0xf) << 16;
 			ehci_writel(status_reg, reg);
@@ -878,31 +918,37 @@ unknown:
 
 int usb_lowlevel_stop(int index)
 {
+	ehci_shutdown(&ehcic[index]);
 	return ehci_hcd_stop(index);
 }
 
-int usb_lowlevel_init(int index, void **controller)
+int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
 {
 	uint32_t reg;
 	uint32_t cmd;
 	struct QH *qh_list;
 	struct QH *periodic;
 	int i;
+	int rc;
 
-	if (ehci_hcd_init(index, &ehcic[index].hccr, &ehcic[index].hcor))
-		return -1;
+	rc = ehci_hcd_init(index, init, &ehcic[index].hccr, &ehcic[index].hcor);
+	if (rc)
+		return rc;
+	if (init == USB_INIT_DEVICE)
+		goto done;
 
 	/* EHCI spec section 4.1 */
 	if (ehci_reset(index))
 		return -1;
 
 #if defined(CONFIG_EHCI_HCD_INIT_AFTER_RESET)
-	if (ehci_hcd_init(index, &ehcic[index].hccr, &ehcic[index].hcor))
-		return -1;
+	rc = ehci_hcd_init(index, init, &ehcic[index].hccr, &ehcic[index].hcor);
+	if (rc)
+		return rc;
 #endif
 	/* Set the high address word (aka segment) for 64-bit controller */
 	if (ehci_readl(&ehcic[index].hccr->cr_hccparams) & 1)
-		ehci_writel(ehcic[index].hcor->or_ctrldssegment, 0);
+		ehci_writel(&ehcic[index].hcor->or_ctrldssegment, 0);
 
 	qh_list = &ehcic[index].qh_list;
 
@@ -999,7 +1045,7 @@ int usb_lowlevel_init(int index, void **controller)
 	printf("USB EHCI %x.%02x\n", reg >> 8, reg & 0xff);
 
 	ehcic[index].rootdev = 0;
-
+done:
 	*controller = &ehcic[index];
 	return 0;
 }