diff mbox series

[06/11] usb: xhci-mtk: support option to disable usb2 ports

Message ID 1627635002-24521-6-git-send-email-chunfeng.yun@mediatek.com (mailing list archive)
State New, archived
Headers show
Series [01/11] dt-bindings: usb: mtk-xhci: add support property 'tpl-support' | expand

Commit Message

Chunfeng Yun (云春峰) July 30, 2021, 8:49 a.m. UTC 
Add support to disable specific usb2 host ports, it's useful when
a usb2 port is disabled on some platforms, but enabled on others
for the same SoC.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
 drivers/usb/host/xhci-mtk.c | 12 ++++++++++--
 drivers/usb/host/xhci-mtk.h |  1 +
 2 files changed, 11 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index f6d161670c4e..12b691547438 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -116,8 +116,11 @@  static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
 		writel(value, &ippc->u3_ctrl_p[i]);
 	}
 
-	/* power on and enable all u2 ports */
+	/* power on and enable all u2 ports except skipped ones */
 	for (i = 0; i < mtk->num_u2_ports; i++) {
+		if (BIT(i) & mtk->u2p_dis_msk)
+			continue;
+
 		value = readl(&ippc->u2_ctrl_p[i]);
 		value &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
 		value |= CTRL_U2_PORT_HOST_SEL;
@@ -164,8 +167,11 @@  static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk)
 		writel(value, &ippc->u3_ctrl_p[i]);
 	}
 
-	/* power down all u2 ports */
+	/* power down all u2 ports except skipped ones */
 	for (i = 0; i < mtk->num_u2_ports; i++) {
+		if (BIT(i) & mtk->u2p_dis_msk)
+			continue;
+
 		value = readl(&ippc->u2_ctrl_p[i]);
 		value |= CTRL_U2_PORT_PDN;
 		writel(value, &ippc->u2_ctrl_p[i]);
@@ -445,6 +451,8 @@  static int xhci_mtk_probe(struct platform_device *pdev)
 	/* optional property, ignore the error if it does not exist */
 	of_property_read_u32(node, "mediatek,u3p-dis-msk",
 			     &mtk->u3p_dis_msk);
+	of_property_read_u32(node, "mediatek,u2p-dis-msk",
+			     &mtk->u2p_dis_msk);
 
 	ret = usb_wakeup_of_property_parse(mtk, node);
 	if (ret) {
diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h
index ace432356c41..0466bc8f7500 100644
--- a/drivers/usb/host/xhci-mtk.h
+++ b/drivers/usb/host/xhci-mtk.h
@@ -138,6 +138,7 @@  struct xhci_hcd_mtk {
 	struct mu3c_ippc_regs __iomem *ippc_regs;
 	int num_u2_ports;
 	int num_u3_ports;
+	int u2p_dis_msk;
 	int u3p_dis_msk;
 	struct regulator *vusb33;
 	struct regulator *vbus;