git.sur5r.net Git - u-boot/blob - drivers/usb/host/ohci-sunxi.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Sunxi ohci glue
   4  *
   5  * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
   6  *
   7  * Based on code from
   8  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
   9  */
  10
  11 #include <common.h>
  12 #include <asm/arch/clock.h>
  13 #include <asm/io.h>
  14 #include <dm.h>
  15 #include <usb.h>
  16 #include "ohci.h"
  17 #include <generic-phy.h>
  18
  19 #ifdef CONFIG_SUNXI_GEN_SUN4I
  20 #define AHB_CLK_DIST            2
  21 #else
  22 #define AHB_CLK_DIST            1
  23 #endif
  24
  25 struct ohci_sunxi_cfg {
  26         bool has_reset;
  27         u32 extra_ahb_gate_mask;
  28         u32 extra_usb_gate_mask;
  29 };
  30
  31 struct ohci_sunxi_priv {
  32         struct sunxi_ccm_reg *ccm;
  33         ohci_t ohci;
  34         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
  35         int usb_gate_mask; /* Mask of usb_clk_cfg clk gate bits for this hcd */
  36         struct phy phy;
  37         const struct ohci_sunxi_cfg *cfg;
  38 };
  39
  40 static int ohci_usb_probe(struct udevice *dev)
  41 {
  42         struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
  43         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
  44         struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
  45         int extra_ahb_gate_mask = 0;
  46         int phys, ret;
  47
  48         priv->cfg = (const struct ohci_sunxi_cfg *)dev_get_driver_data(dev);
  49         priv->ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  50         if (IS_ERR(priv->ccm))
  51                 return PTR_ERR(priv->ccm);
  52
  53         phys = dev_count_phandle_with_args(dev, "phys", "#phy-cells");
  54         if (phys < 0) {
  55                 phys = 0;
  56                 goto no_phy;
  57         }
  58
  59         ret = generic_phy_get_by_name(dev, "usb", &priv->phy);
  60         if (ret) {
  61                 pr_err("failed to get %s usb PHY\n", dev->name);
  62                 return ret;
  63         }
  64
  65         ret = generic_phy_init(&priv->phy);
  66         if (ret) {
  67                 pr_err("failed to init %s USB PHY\n", dev->name);
  68                 return ret;
  69         }
  70
  71         ret = generic_phy_power_on(&priv->phy);
  72         if (ret) {
  73                 pr_err("failed to power on %s USB PHY\n", dev->name);
  74                 return ret;
  75         }
  76
  77 no_phy:
  78         bus_priv->companion = true;
  79
  80         /*
  81          * This should go away once we've moved to the driver model for
  82          * clocks resp. phys.
  83          */
  84         priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0;
  85         extra_ahb_gate_mask = priv->cfg->extra_ahb_gate_mask;
  86         priv->usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK;
  87         priv->ahb_gate_mask <<= phys * AHB_CLK_DIST;
  88         extra_ahb_gate_mask <<= phys * AHB_CLK_DIST;
  89         priv->usb_gate_mask <<= phys;
  90
  91         setbits_le32(&priv->ccm->ahb_gate0,
  92                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  93         setbits_le32(&priv->ccm->usb_clk_cfg,
  94                      priv->usb_gate_mask | priv->cfg->extra_usb_gate_mask);
  95         if (priv->cfg->has_reset)
  96                 setbits_le32(&priv->ccm->ahb_reset0_cfg,
  97                              priv->ahb_gate_mask | extra_ahb_gate_mask);
  98
  99         return ohci_register(dev, regs);
 100 }
 101
 102 static int ohci_usb_remove(struct udevice *dev)
 103 {
 104         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
 105         int ret;
 106
 107         if (generic_phy_valid(&priv->phy)) {
 108                 ret = generic_phy_exit(&priv->phy);
 109                 if (ret) {
 110                         pr_err("failed to exit %s USB PHY\n", dev->name);
 111                         return ret;
 112                 }
 113         }
 114
 115         ret = ohci_deregister(dev);
 116         if (ret)
 117                 return ret;
 118
 119         if (priv->cfg->has_reset)
 120                 clrbits_le32(&priv->ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
 121         clrbits_le32(&priv->ccm->usb_clk_cfg, priv->usb_gate_mask);
 122         clrbits_le32(&priv->ccm->ahb_gate0, priv->ahb_gate_mask);
 123
 124         return 0;
 125 }
 126
 127 static const struct ohci_sunxi_cfg sun4i_a10_cfg = {
 128         .has_reset = false,
 129 };
 130
 131 static const struct ohci_sunxi_cfg sun6i_a31_cfg = {
 132         .has_reset = true,
 133 };
 134
 135 static const struct ohci_sunxi_cfg sun8i_h3_cfg = {
 136         .has_reset = true,
 137         .extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0,
 138 };
 139
 140 static const struct ohci_sunxi_cfg sun50i_a64_cfg = {
 141         .has_reset = true,
 142         .extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0,
 143         .extra_usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK,
 144 };
 145
 146 static const struct udevice_id ohci_usb_ids[] = {
 147         {
 148                 .compatible = "allwinner,sun4i-a10-ohci",
 149                 .data = (ulong)&sun4i_a10_cfg,
 150         },
 151         {
 152                 .compatible = "allwinner,sun5i-a13-ohci",
 153                 .data = (ulong)&sun4i_a10_cfg,
 154         },
 155         {
 156                 .compatible = "allwinner,sun6i-a31-ohci",
 157                 .data = (ulong)&sun6i_a31_cfg,
 158         },
 159         {
 160                 .compatible = "allwinner,sun7i-a20-ohci",
 161                 .data = (ulong)&sun4i_a10_cfg,
 162         },
 163         {
 164                 .compatible = "allwinner,sun8i-a23-ohci",
 165                 .data = (ulong)&sun6i_a31_cfg,
 166         },
 167         {
 168                 .compatible = "allwinner,sun8i-a83t-ohci",
 169                 .data = (ulong)&sun6i_a31_cfg,
 170         },
 171         {
 172                 .compatible = "allwinner,sun8i-h3-ohci",
 173                 .data = (ulong)&sun8i_h3_cfg,
 174         },
 175         {
 176                 .compatible = "allwinner,sun9i-a80-ohci",
 177                 .data = (ulong)&sun6i_a31_cfg,
 178         },
 179         {
 180                 .compatible = "allwinner,sun50i-a64-ohci",
 181                 .data = (ulong)&sun50i_a64_cfg,
 182         },
 183         { /* sentinel */ }
 184 };
 185
 186 U_BOOT_DRIVER(usb_ohci) = {
 187         .name   = "ohci_sunxi",
 188         .id     = UCLASS_USB,
 189         .of_match = ohci_usb_ids,
 190         .probe = ohci_usb_probe,
 191         .remove = ohci_usb_remove,
 192         .ops    = &ohci_usb_ops,
 193         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 194         .priv_auto_alloc_size = sizeof(struct ohci_sunxi_priv),
 195         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 196 };