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usb: xhci-mtk: support option to disable ports
Add support to disable specific ports, it's useful for some scenarios: 1. usb3 PHY is shared whith PCIe or SATA, the corresponding usb3 port can be disabled; 2. some usb2 or usb3 ports are not used on special platforms, they should be disabled to save power. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
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parent
c7182c02ce
commit
04232f78b3
1 changed files with 20 additions and 3 deletions
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@ -61,10 +61,13 @@ struct mtk_xhci {
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struct phy_bulk phys;
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int num_u2ports;
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int num_u3ports;
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u32 u3p_dis_msk;
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u32 u2p_dis_msk;
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};
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static int xhci_mtk_host_enable(struct mtk_xhci *mtk)
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{
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int u3_ports_disabed = 0;
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u32 value;
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u32 check_val;
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int ret;
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@ -73,15 +76,23 @@ static int xhci_mtk_host_enable(struct mtk_xhci *mtk)
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/* power on host ip */
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clrbits_le32(mtk->ippc + IPPC_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);
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/* power on and enable all u3 ports */
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/* power on and enable u3 ports except skipped ones */
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for (i = 0; i < mtk->num_u3ports; i++) {
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if (BIT(i) & mtk->u3p_dis_msk) {
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u3_ports_disabed++;
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continue;
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}
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clrsetbits_le32(mtk->ippc + IPPC_U3_CTRL(i),
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CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS,
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CTRL_U3_PORT_HOST_SEL);
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}
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/* power on and enable all u2 ports */
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/* power on and enable u2 ports except skipped ones */
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for (i = 0; i < mtk->num_u2ports; i++) {
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if (BIT(i) & mtk->u2p_dis_msk)
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continue;
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clrsetbits_le32(mtk->ippc + IPPC_U2_CTRL(i),
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CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS,
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CTRL_U2_PORT_HOST_SEL);
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@ -94,7 +105,7 @@ static int xhci_mtk_host_enable(struct mtk_xhci *mtk)
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check_val = STS1_SYSPLL_STABLE | STS1_REF_RST |
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STS1_SYS125_RST | STS1_XHCI_RST;
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if (mtk->num_u3ports)
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if (mtk->num_u3ports > u3_ports_disabed)
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check_val |= STS1_U3_MAC_RST;
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ret = readl_poll_timeout(mtk->ippc + IPPC_IP_PW_STS1, value,
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@ -176,6 +187,12 @@ static int xhci_mtk_ofdata_get(struct mtk_xhci *mtk)
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if (ret)
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debug("can't get vbus regulator %d!\n", ret);
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/* optional properties to disable ports, ignore the error */
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dev_read_u32(dev, "mediatek,u3p-dis-msk", &mtk->u3p_dis_msk);
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dev_read_u32(dev, "mediatek,u2p-dis-msk", &mtk->u2p_dis_msk);
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dev_info(dev, "ports disabled mask: u3p-0x%x, u2p-0x%x\n",
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mtk->u3p_dis_msk, mtk->u2p_dis_msk);
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return 0;
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}
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