diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.14/0129-usb-xhci-mtk-support-option-to-disable-usb3-ports.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.14/0129-usb-xhci-mtk-support-option-to-disable-usb3-ports.patch | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.14/0129-usb-xhci-mtk-support-option-to-disable-usb3-ports.patch b/target/linux/mediatek/patches-4.14/0129-usb-xhci-mtk-support-option-to-disable-usb3-ports.patch new file mode 100644 index 0000000000..90e2aed441 --- /dev/null +++ b/target/linux/mediatek/patches-4.14/0129-usb-xhci-mtk-support-option-to-disable-usb3-ports.patch @@ -0,0 +1,92 @@ +From 13a1b2e927893cbb046a1ec5a55ec3516873a3f6 Mon Sep 17 00:00:00 2001 +From: Chunfeng Yun <chunfeng.yun@mediatek.com> +Date: Fri, 13 Oct 2017 16:26:36 +0800 +Subject: [PATCH 129/224] usb: xhci-mtk: support option to disable usb3 ports + +Add support to disable specific usb3 ports, it's useful when +usb3 phy is shared with PCIe or SATA, because we should disable +the corresponding usb3 port if the phy is used by PCIe or SATA. +Sometimes it's helpful to analyse and solve problems. + +Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> +Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/usb/host/xhci-mtk.c | 18 +++++++++++++++--- + drivers/usb/host/xhci-mtk.h | 1 + + 2 files changed, 16 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) +diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h +index 3aa5e1d25064..db55a12f1585 100644 +--- a/drivers/usb/host/xhci-mtk.h ++++ b/drivers/usb/host/xhci-mtk.h +@@ -121,6 +121,7 @@ struct xhci_hcd_mtk { + bool has_ippc; + int num_u2_ports; + int num_u3_ports; ++ int u3p_dis_msk; + struct regulator *vusb33; + struct regulator *vbus; + struct clk *sys_clk; /* sys and mac clock */ +-- +2.11.0 + |