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