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From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Rob Herring <robh+dt@kernel.org>,
	Mathias Nyman <mathias.nyman@intel.com>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	<linux-usb@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	Eddie Hung <eddie.hung@mediatek.com>
Subject: [PATCH RESEND 4/9] usb: xhci-mtk: support option to disable usb2 ports
Date: Tue, 17 Aug 2021 16:36:24 +0800	[thread overview]
Message-ID: <1629189389-18779-4-git-send-email-chunfeng.yun@mediatek.com> (raw)
In-Reply-To: <1629189389-18779-1-git-send-email-chunfeng.yun@mediatek.com>

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 --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;
-- 
2.18.0


  parent reply	other threads:[~2021-08-17  8:37 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-17  8:36 [PATCH RESEND 1/9] dt-bindings: usb: mtk-xhci: add optional property " Chunfeng Yun
2021-08-17  8:36 ` [PATCH RESEND 2/9] dt-bindings: usb: mtk-xhci: add compatible for mt8195 Chunfeng Yun
2021-08-17  8:36 ` [PATCH RESEND 3/9] usb: xhci-mtk: fix use-after-free of mtk->hcd Chunfeng Yun
2021-08-17  8:36 ` Chunfeng Yun [this message]
2021-08-17  8:36 ` [PATCH RESEND 5/9] usb: xhci-mtk: fix issue of out-of-bounds array access Chunfeng Yun
2021-08-17  8:36 ` [PATCH RESEND 6/9] usb: xhci-mtk: update fs bus bandwidth by bw_budget_table Chunfeng Yun
2021-08-17  8:36 ` [PATCH RESEND 7/9] usb: xhci-mtk: check boundary before check tt Chunfeng Yun
2021-08-17  8:36 ` [PATCH RESEND 8/9] usb: xhci-mtk: add a member of num_esit Chunfeng Yun
2021-08-17  8:36 ` [PATCH RESEND 9/9] usb: xhci-mtk: modify the SOF/ITP interval for mt8195 Chunfeng Yun
2021-08-18 14:10 ` [PATCH RESEND 1/9] dt-bindings: usb: mtk-xhci: add optional property to disable usb2 ports Rob Herring

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