diff options
Diffstat (limited to 'drivers/usb/host/xhci-mtk.c')
| -rw-r--r-- | drivers/usb/host/xhci-mtk.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index 7a92bb782e5c..97ba51e4e149 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -92,6 +92,7 @@ static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk) { struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs; u32 value, check_val; + int u3_ports_disabed = 0; int ret; int i; @@ -103,8 +104,13 @@ static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk) value &= ~CTRL1_IP_HOST_PDN; writel(value, &ippc->ip_pw_ctr1); - /* power on and enable all u3 ports */ + /* power on and enable u3 ports except skipped ones */ for (i = 0; i < mtk->num_u3_ports; i++) { + if ((0x1 << i) & mtk->u3p_dis_msk) { + u3_ports_disabed++; + continue; + } + value = readl(&ippc->u3_ctrl_p[i]); value &= ~(CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS); value |= CTRL_U3_PORT_HOST_SEL; @@ -126,7 +132,7 @@ static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk) check_val = STS1_SYSPLL_STABLE | STS1_REF_RST | STS1_SYS125_RST | STS1_XHCI_RST; - if (mtk->num_u3_ports) + if (mtk->num_u3_ports > u3_ports_disabed) check_val |= STS1_U3_MAC_RST; ret = readl_poll_timeout(&ippc->ip_pw_sts1, value, @@ -149,8 +155,11 @@ static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk) if (!mtk->has_ippc) return 0; - /* power down all u3 ports */ + /* power down u3 ports except skipped ones */ for (i = 0; i < mtk->num_u3_ports; i++) { + if ((0x1 << i) & mtk->u3p_dis_msk) + continue; + value = readl(&ippc->u3_ctrl_p[i]); value |= CTRL_U3_PORT_PDN; writel(value, &ippc->u3_ctrl_p[i]); @@ -573,6 +582,9 @@ static int xhci_mtk_probe(struct platform_device *pdev) } mtk->lpm_support = of_property_read_bool(node, "usb3-lpm-capable"); + /* optional property, ignore the error if it does not exist */ + of_property_read_u32(node, "mediatek,u3p-dis-msk", + &mtk->u3p_dis_msk); ret = usb_wakeup_of_property_parse(mtk, node); if (ret) |