usb: xhci-mtk: support option to disable usb2 ports
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> Link: https://lore.kernel.org/r/1629189389-18779-4-git-send-email-chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -115,8 +115,11 @@ static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
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writel(value, &ippc->u3_ctrl_p[i]);
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}
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/* power on and enable all u2 ports */
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/* power on and enable all u2 ports except skipped ones */
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for (i = 0; i < mtk->num_u2_ports; i++) {
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if (BIT(i) & mtk->u2p_dis_msk)
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continue;
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value = readl(&ippc->u2_ctrl_p[i]);
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value &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
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value |= CTRL_U2_PORT_HOST_SEL;
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@ -163,8 +166,11 @@ static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk)
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writel(value, &ippc->u3_ctrl_p[i]);
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}
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/* power down all u2 ports */
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/* power down all u2 ports except skipped ones */
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for (i = 0; i < mtk->num_u2_ports; i++) {
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if (BIT(i) & mtk->u2p_dis_msk)
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continue;
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value = readl(&ippc->u2_ctrl_p[i]);
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value |= CTRL_U2_PORT_PDN;
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writel(value, &ippc->u2_ctrl_p[i]);
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@ -444,6 +450,8 @@ static int xhci_mtk_probe(struct platform_device *pdev)
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/* optional property, ignore the error if it does not exist */
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of_property_read_u32(node, "mediatek,u3p-dis-msk",
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&mtk->u3p_dis_msk);
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of_property_read_u32(node, "mediatek,u2p-dis-msk",
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&mtk->u2p_dis_msk);
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ret = usb_wakeup_of_property_parse(mtk, node);
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if (ret) {
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@ -138,6 +138,7 @@ struct xhci_hcd_mtk {
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struct mu3c_ippc_regs __iomem *ippc_regs;
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int num_u2_ports;
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int num_u3_ports;
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int u2p_dis_msk;
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int u3p_dis_msk;
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struct regulator *vusb33;
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struct regulator *vbus;
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