drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2016 Chen-Yu Tsai. All rights reserved.
   4  */
   5
   6 #include <linux/clk.h>
   7 #include <linux/clk-provider.h>
   8 #include <linux/module.h>
   9 #include <linux/platform_device.h>
  10
  11 #include "ccu_common.h"
  12 #include "ccu_gate.h"
  13 #include "ccu_reset.h"
  14
  15 #include "ccu-sun9i-a80-usb.h"
  16
  17 static const struct clk_parent_data clk_parent_hosc[] = {
  18         { .fw_name = "hosc" },
  19 };
  20
  21 static const struct clk_parent_data clk_parent_bus[] = {
  22         { .fw_name = "bus" },
  23 };
  24
  25 static SUNXI_CCU_GATE_DATA(bus_hci0_clk, "bus-hci0", clk_parent_bus, 0x0, BIT(1), 0);
  26 static SUNXI_CCU_GATE_DATA(usb_ohci0_clk, "usb-ohci0", clk_parent_hosc, 0x0, BIT(2), 0);
  27 static SUNXI_CCU_GATE_DATA(bus_hci1_clk, "bus-hci1", clk_parent_bus, 0x0, BIT(3), 0);
  28 static SUNXI_CCU_GATE_DATA(bus_hci2_clk, "bus-hci2", clk_parent_bus, 0x0, BIT(5), 0);
  29 static SUNXI_CCU_GATE_DATA(usb_ohci2_clk, "usb-ohci2", clk_parent_hosc, 0x0, BIT(6), 0);
  30
  31 static SUNXI_CCU_GATE_DATA(usb0_phy_clk, "usb0-phy", clk_parent_hosc, 0x4, BIT(1), 0);
  32 static SUNXI_CCU_GATE_DATA(usb1_hsic_clk, "usb1-hsic", clk_parent_hosc, 0x4, BIT(2), 0);
  33 static SUNXI_CCU_GATE_DATA(usb1_phy_clk, "usb1-phy", clk_parent_hosc, 0x4, BIT(3), 0);
  34 static SUNXI_CCU_GATE_DATA(usb2_hsic_clk, "usb2-hsic", clk_parent_hosc, 0x4, BIT(4), 0);
  35 static SUNXI_CCU_GATE_DATA(usb2_phy_clk, "usb2-phy", clk_parent_hosc, 0x4, BIT(5), 0);
  36 static SUNXI_CCU_GATE_DATA(usb_hsic_clk, "usb-hsic", clk_parent_hosc, 0x4, BIT(10), 0);
  37
  38 static struct ccu_common *sun9i_a80_usb_clks[] = {
  39         &bus_hci0_clk.common,
  40         &usb_ohci0_clk.common,
  41         &bus_hci1_clk.common,
  42         &bus_hci2_clk.common,
  43         &usb_ohci2_clk.common,
  44
  45         &usb0_phy_clk.common,
  46         &usb1_hsic_clk.common,
  47         &usb1_phy_clk.common,
  48         &usb2_hsic_clk.common,
  49         &usb2_phy_clk.common,
  50         &usb_hsic_clk.common,
  51 };
  52
  53 static struct clk_hw_onecell_data sun9i_a80_usb_hw_clks = {
  54         .hws    = {
  55                 [CLK_BUS_HCI0]  = &bus_hci0_clk.common.hw,
  56                 [CLK_USB_OHCI0] = &usb_ohci0_clk.common.hw,
  57                 [CLK_BUS_HCI1]  = &bus_hci1_clk.common.hw,
  58                 [CLK_BUS_HCI2]  = &bus_hci2_clk.common.hw,
  59                 [CLK_USB_OHCI2] = &usb_ohci2_clk.common.hw,
  60
  61                 [CLK_USB0_PHY]  = &usb0_phy_clk.common.hw,
  62                 [CLK_USB1_HSIC] = &usb1_hsic_clk.common.hw,
  63                 [CLK_USB1_PHY]  = &usb1_phy_clk.common.hw,
  64                 [CLK_USB2_HSIC] = &usb2_hsic_clk.common.hw,
  65                 [CLK_USB2_PHY]  = &usb2_phy_clk.common.hw,
  66                 [CLK_USB_HSIC]  = &usb_hsic_clk.common.hw,
  67         },
  68         .num    = CLK_NUMBER,
  69 };
  70
  71 static const struct ccu_reset_map sun9i_a80_usb_resets[] = {
  72         [RST_USB0_HCI]          = { 0x0, BIT(17) },
  73         [RST_USB1_HCI]          = { 0x0, BIT(18) },
  74         [RST_USB2_HCI]          = { 0x0, BIT(19) },
  75
  76         [RST_USB0_PHY]          = { 0x4, BIT(17) },
  77         [RST_USB1_HSIC]         = { 0x4, BIT(18) },
  78         [RST_USB1_PHY]          = { 0x4, BIT(19) },
  79         [RST_USB2_HSIC]         = { 0x4, BIT(20) },
  80         [RST_USB2_PHY]          = { 0x4, BIT(21) },
  81 };
  82
  83 static const struct sunxi_ccu_desc sun9i_a80_usb_clk_desc = {
  84         .ccu_clks       = sun9i_a80_usb_clks,
  85         .num_ccu_clks   = ARRAY_SIZE(sun9i_a80_usb_clks),
  86
  87         .hw_clks        = &sun9i_a80_usb_hw_clks,
  88
  89         .resets         = sun9i_a80_usb_resets,
  90         .num_resets     = ARRAY_SIZE(sun9i_a80_usb_resets),
  91 };
  92
  93 static int sun9i_a80_usb_clk_probe(struct platform_device *pdev)
  94 {
  95         struct clk *bus_clk;
  96         void __iomem *reg;
  97         int ret;
  98
  99         reg = devm_platform_ioremap_resource(pdev, 0);
 100         if (IS_ERR(reg))
 101                 return PTR_ERR(reg);
 102
 103         bus_clk = devm_clk_get(&pdev->dev, "bus");
 104         if (IS_ERR(bus_clk))
 105                 return dev_err_probe(&pdev->dev, PTR_ERR(bus_clk),
 106                                      "Couldn't get bus clk\n");
 107
 108         /* The bus clock needs to be enabled for us to access the registers */
 109         ret = clk_prepare_enable(bus_clk);
 110         if (ret) {
 111                 dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
 112                 return ret;
 113         }
 114
 115         ret = devm_sunxi_ccu_probe(&pdev->dev, reg, &sun9i_a80_usb_clk_desc);
 116         if (ret)
 117                 goto err_disable_clk;
 118
 119         return 0;
 120
 121 err_disable_clk:
 122         clk_disable_unprepare(bus_clk);
 123         return ret;
 124 }
 125
 126 static const struct of_device_id sun9i_a80_usb_clk_ids[] = {
 127         { .compatible = "allwinner,sun9i-a80-usb-clks" },
 128         { }
 129 };
 130 MODULE_DEVICE_TABLE(of, sun9i_a80_usb_clk_ids);
 131
 132 static struct platform_driver sun9i_a80_usb_clk_driver = {
 133         .probe  = sun9i_a80_usb_clk_probe,
 134         .driver = {
 135                 .name   = "sun9i-a80-usb-clks",
 136                 .of_match_table = sun9i_a80_usb_clk_ids,
 137         },
 138 };
 139 module_platform_driver(sun9i_a80_usb_clk_driver);
 140
 141 MODULE_IMPORT_NS("SUNXI_CCU");
 142 MODULE_DESCRIPTION("Support for the Allwinner A80 USB CCU");
 143 MODULE_LICENSE("GPL");