1439b65c4SChen-Yu Tsai /* 2439b65c4SChen-Yu Tsai * Copyright (c) 2016 Chen-Yu Tsai. All rights reserved. 3439b65c4SChen-Yu Tsai * 4439b65c4SChen-Yu Tsai * This software is licensed under the terms of the GNU General Public 5439b65c4SChen-Yu Tsai * License version 2, as published by the Free Software Foundation, and 6439b65c4SChen-Yu Tsai * may be copied, distributed, and modified under those terms. 7439b65c4SChen-Yu Tsai * 8439b65c4SChen-Yu Tsai * This program is distributed in the hope that it will be useful, 9439b65c4SChen-Yu Tsai * but WITHOUT ANY WARRANTY; without even the implied warranty of 10439b65c4SChen-Yu Tsai * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11439b65c4SChen-Yu Tsai * GNU General Public License for more details. 12439b65c4SChen-Yu Tsai */ 13439b65c4SChen-Yu Tsai 14439b65c4SChen-Yu Tsai #include <linux/clk.h> 15439b65c4SChen-Yu Tsai #include <linux/clk-provider.h> 16439b65c4SChen-Yu Tsai #include <linux/of_address.h> 17439b65c4SChen-Yu Tsai #include <linux/platform_device.h> 18439b65c4SChen-Yu Tsai 19439b65c4SChen-Yu Tsai #include "ccu_common.h" 20439b65c4SChen-Yu Tsai #include "ccu_gate.h" 21439b65c4SChen-Yu Tsai #include "ccu_reset.h" 22439b65c4SChen-Yu Tsai 23439b65c4SChen-Yu Tsai #include "ccu-sun9i-a80-usb.h" 24439b65c4SChen-Yu Tsai 25439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(bus_hci0_clk, "bus-hci0", "bus-usb", 0x0, BIT(1), 0); 26439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(usb_ohci0_clk, "usb-ohci0", "osc24M", 0x0, BIT(2), 0); 27439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(bus_hci1_clk, "bus-hci1", "bus-usb", 0x0, BIT(3), 0); 28439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(bus_hci2_clk, "bus-hci2", "bus-usb", 0x0, BIT(5), 0); 29439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(usb_ohci2_clk, "usb-ohci2", "osc24M", 0x0, BIT(6), 0); 30439b65c4SChen-Yu Tsai 31439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(usb0_phy_clk, "usb0-phy", "osc24M", 0x4, BIT(1), 0); 32439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(usb1_hsic_clk, "usb1-hsic", "osc24M", 0x4, BIT(2), 0); 33439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(usb1_phy_clk, "usb1-phy", "osc24M", 0x4, BIT(3), 0); 34439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(usb2_hsic_clk, "usb2-hsic", "osc24M", 0x4, BIT(4), 0); 35439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(usb2_phy_clk, "usb2-phy", "osc24M", 0x4, BIT(5), 0); 36439b65c4SChen-Yu Tsai static SUNXI_CCU_GATE(usb_hsic_clk, "usb-hsic", "osc24M", 0x4, BIT(10), 0); 37439b65c4SChen-Yu Tsai 38439b65c4SChen-Yu Tsai static struct ccu_common *sun9i_a80_usb_clks[] = { 39439b65c4SChen-Yu Tsai &bus_hci0_clk.common, 40439b65c4SChen-Yu Tsai &usb_ohci0_clk.common, 41439b65c4SChen-Yu Tsai &bus_hci1_clk.common, 42439b65c4SChen-Yu Tsai &bus_hci2_clk.common, 43439b65c4SChen-Yu Tsai &usb_ohci2_clk.common, 44439b65c4SChen-Yu Tsai 45439b65c4SChen-Yu Tsai &usb0_phy_clk.common, 46439b65c4SChen-Yu Tsai &usb1_hsic_clk.common, 47439b65c4SChen-Yu Tsai &usb1_phy_clk.common, 48439b65c4SChen-Yu Tsai &usb2_hsic_clk.common, 49439b65c4SChen-Yu Tsai &usb2_phy_clk.common, 50439b65c4SChen-Yu Tsai &usb_hsic_clk.common, 51439b65c4SChen-Yu Tsai }; 52439b65c4SChen-Yu Tsai 53439b65c4SChen-Yu Tsai static struct clk_hw_onecell_data sun9i_a80_usb_hw_clks = { 54439b65c4SChen-Yu Tsai .hws = { 55439b65c4SChen-Yu Tsai [CLK_BUS_HCI0] = &bus_hci0_clk.common.hw, 56439b65c4SChen-Yu Tsai [CLK_USB_OHCI0] = &usb_ohci0_clk.common.hw, 57439b65c4SChen-Yu Tsai [CLK_BUS_HCI1] = &bus_hci1_clk.common.hw, 58439b65c4SChen-Yu Tsai [CLK_BUS_HCI2] = &bus_hci2_clk.common.hw, 59439b65c4SChen-Yu Tsai [CLK_USB_OHCI2] = &usb_ohci2_clk.common.hw, 60439b65c4SChen-Yu Tsai 61439b65c4SChen-Yu Tsai [CLK_USB0_PHY] = &usb0_phy_clk.common.hw, 62439b65c4SChen-Yu Tsai [CLK_USB1_HSIC] = &usb1_hsic_clk.common.hw, 63439b65c4SChen-Yu Tsai [CLK_USB1_PHY] = &usb1_phy_clk.common.hw, 64439b65c4SChen-Yu Tsai [CLK_USB2_HSIC] = &usb2_hsic_clk.common.hw, 65439b65c4SChen-Yu Tsai [CLK_USB2_PHY] = &usb2_phy_clk.common.hw, 66439b65c4SChen-Yu Tsai [CLK_USB_HSIC] = &usb_hsic_clk.common.hw, 67439b65c4SChen-Yu Tsai }, 68439b65c4SChen-Yu Tsai .num = CLK_NUMBER, 69439b65c4SChen-Yu Tsai }; 70439b65c4SChen-Yu Tsai 71439b65c4SChen-Yu Tsai static struct ccu_reset_map sun9i_a80_usb_resets[] = { 72439b65c4SChen-Yu Tsai [RST_USB0_HCI] = { 0x0, BIT(17) }, 73439b65c4SChen-Yu Tsai [RST_USB1_HCI] = { 0x0, BIT(18) }, 74439b65c4SChen-Yu Tsai [RST_USB2_HCI] = { 0x0, BIT(19) }, 75439b65c4SChen-Yu Tsai 76439b65c4SChen-Yu Tsai [RST_USB0_PHY] = { 0x4, BIT(17) }, 77439b65c4SChen-Yu Tsai [RST_USB1_HSIC] = { 0x4, BIT(18) }, 78439b65c4SChen-Yu Tsai [RST_USB1_PHY] = { 0x4, BIT(19) }, 79439b65c4SChen-Yu Tsai [RST_USB2_HSIC] = { 0x4, BIT(20) }, 80439b65c4SChen-Yu Tsai [RST_USB2_PHY] = { 0x4, BIT(21) }, 81439b65c4SChen-Yu Tsai }; 82439b65c4SChen-Yu Tsai 83439b65c4SChen-Yu Tsai static const struct sunxi_ccu_desc sun9i_a80_usb_clk_desc = { 84439b65c4SChen-Yu Tsai .ccu_clks = sun9i_a80_usb_clks, 85439b65c4SChen-Yu Tsai .num_ccu_clks = ARRAY_SIZE(sun9i_a80_usb_clks), 86439b65c4SChen-Yu Tsai 87439b65c4SChen-Yu Tsai .hw_clks = &sun9i_a80_usb_hw_clks, 88439b65c4SChen-Yu Tsai 89439b65c4SChen-Yu Tsai .resets = sun9i_a80_usb_resets, 90439b65c4SChen-Yu Tsai .num_resets = ARRAY_SIZE(sun9i_a80_usb_resets), 91439b65c4SChen-Yu Tsai }; 92439b65c4SChen-Yu Tsai 93439b65c4SChen-Yu Tsai static int sun9i_a80_usb_clk_probe(struct platform_device *pdev) 94439b65c4SChen-Yu Tsai { 95439b65c4SChen-Yu Tsai struct resource *res; 96439b65c4SChen-Yu Tsai struct clk *bus_clk; 97439b65c4SChen-Yu Tsai void __iomem *reg; 98439b65c4SChen-Yu Tsai int ret; 99439b65c4SChen-Yu Tsai 100439b65c4SChen-Yu Tsai res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 101439b65c4SChen-Yu Tsai reg = devm_ioremap_resource(&pdev->dev, res); 102439b65c4SChen-Yu Tsai if (IS_ERR(reg)) 103439b65c4SChen-Yu Tsai return PTR_ERR(reg); 104439b65c4SChen-Yu Tsai 105439b65c4SChen-Yu Tsai bus_clk = devm_clk_get(&pdev->dev, "bus"); 106439b65c4SChen-Yu Tsai if (IS_ERR(bus_clk)) { 107439b65c4SChen-Yu Tsai ret = PTR_ERR(bus_clk); 108439b65c4SChen-Yu Tsai if (ret != -EPROBE_DEFER) 109439b65c4SChen-Yu Tsai dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret); 110439b65c4SChen-Yu Tsai return ret; 111439b65c4SChen-Yu Tsai } 112439b65c4SChen-Yu Tsai 113439b65c4SChen-Yu Tsai /* The bus clock needs to be enabled for us to access the registers */ 114439b65c4SChen-Yu Tsai ret = clk_prepare_enable(bus_clk); 115439b65c4SChen-Yu Tsai if (ret) { 116439b65c4SChen-Yu Tsai dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret); 117439b65c4SChen-Yu Tsai return ret; 118439b65c4SChen-Yu Tsai } 119439b65c4SChen-Yu Tsai 120439b65c4SChen-Yu Tsai ret = sunxi_ccu_probe(pdev->dev.of_node, reg, 121439b65c4SChen-Yu Tsai &sun9i_a80_usb_clk_desc); 122439b65c4SChen-Yu Tsai if (ret) 123439b65c4SChen-Yu Tsai goto err_disable_clk; 124439b65c4SChen-Yu Tsai 125439b65c4SChen-Yu Tsai return 0; 126439b65c4SChen-Yu Tsai 127439b65c4SChen-Yu Tsai err_disable_clk: 128439b65c4SChen-Yu Tsai clk_disable_unprepare(bus_clk); 129439b65c4SChen-Yu Tsai return ret; 130439b65c4SChen-Yu Tsai } 131439b65c4SChen-Yu Tsai 132439b65c4SChen-Yu Tsai static const struct of_device_id sun9i_a80_usb_clk_ids[] = { 133439b65c4SChen-Yu Tsai { .compatible = "allwinner,sun9i-a80-usb-clks" }, 134439b65c4SChen-Yu Tsai { } 135439b65c4SChen-Yu Tsai }; 136439b65c4SChen-Yu Tsai 137439b65c4SChen-Yu Tsai static struct platform_driver sun9i_a80_usb_clk_driver = { 138439b65c4SChen-Yu Tsai .probe = sun9i_a80_usb_clk_probe, 139439b65c4SChen-Yu Tsai .driver = { 140439b65c4SChen-Yu Tsai .name = "sun9i-a80-usb-clks", 141439b65c4SChen-Yu Tsai .of_match_table = sun9i_a80_usb_clk_ids, 142439b65c4SChen-Yu Tsai }, 143439b65c4SChen-Yu Tsai }; 144439b65c4SChen-Yu Tsai builtin_platform_driver(sun9i_a80_usb_clk_driver); 145