usb: aspeed-vhub: support test mode feature

Support aspeed usb vhub set feature to test mode.

Signed-off-by: Neal Liu <neal_liu@aspeedtech.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Link: https://lore.kernel.org/r/20211208100545.1441397-5-neal_liu@aspeedtech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
index d918e8b..b0dfca4 100644 (file)
--- a/drivers/usb/gadget/udc/aspeed-vhub/dev.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
@@ -110,15 +110,26 @@ static int ast_vhub_dev_feature(struct ast_vhub_dev *d,
                                u16 wIndex, u16 wValue,
                                bool is_set)
 {
+       u32 val;
+
        DDBG(d, "%s_FEATURE(dev val=%02x)\n",
             is_set ? "SET" : "CLEAR", wValue);
 
-       if (wValue != USB_DEVICE_REMOTE_WAKEUP)
-               return std_req_driver;
+       if (wValue == USB_DEVICE_REMOTE_WAKEUP) {
+               d->wakeup_en = is_set;
+               return std_req_complete;
+       }
 
-       d->wakeup_en = is_set;
+       if (wValue == USB_DEVICE_TEST_MODE) {
+               val = readl(d->vhub->regs + AST_VHUB_CTRL);
+               val &= ~GENMASK(10, 8);
+               val |= VHUB_CTRL_SET_TEST_MODE((wIndex >> 8) & 0x7);
+               writel(val, d->vhub->regs + AST_VHUB_CTRL);
 
-       return std_req_complete;
+               return std_req_complete;
+       }
+
+       return std_req_driver;
 }
 
 static int ast_vhub_ep_feature(struct ast_vhub_dev *d,

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
index 93f27a7..65cd4e4 100644 (file)
--- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
@@ -212,17 +212,28 @@ static int ast_vhub_hub_dev_feature(struct ast_vhub_ep *ep,
                                    u16 wIndex, u16 wValue,
                                    bool is_set)
 {
+       u32 val;
+
        EPDBG(ep, "%s_FEATURE(dev val=%02x)\n",
              is_set ? "SET" : "CLEAR", wValue);
 
-       if (wValue != USB_DEVICE_REMOTE_WAKEUP)
-               return std_req_stall;
+       if (wValue == USB_DEVICE_REMOTE_WAKEUP) {
+               ep->vhub->wakeup_en = is_set;
+               EPDBG(ep, "Hub remote wakeup %s\n",
+                     is_set ? "enabled" : "disabled");
+               return std_req_complete;
+       }
 
-       ep->vhub->wakeup_en = is_set;
-       EPDBG(ep, "Hub remote wakeup %s\n",
-             is_set ? "enabled" : "disabled");
+       if (wValue == USB_DEVICE_TEST_MODE) {
+               val = readl(ep->vhub->regs + AST_VHUB_CTRL);
+               val &= ~GENMASK(10, 8);
+               val |= VHUB_CTRL_SET_TEST_MODE((wIndex >> 8) & 0x7);
+               writel(val, ep->vhub->regs + AST_VHUB_CTRL);
 
-       return std_req_complete;
+               return std_req_complete;
+       }
+
+       return std_req_stall;
 }
 
 static int ast_vhub_hub_ep_feature(struct ast_vhub_ep *ep,