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

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Sunxi ehci glue
   4  *
   5  * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
   6  * Copyright (C) 2014 Roman Byshko <rbyshko@gmail.com>
   7  *
   8  * Based on code from
   9  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
  10  */
  11
  12 #include <common.h>
  13 #include <asm/arch/clock.h>
  14 #include <asm/io.h>
  15 #include <dm.h>
  16 #include "ehci.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 ehci_sunxi_cfg {
  26         bool has_reset;
  27         u32 extra_ahb_gate_mask;
  28 };
  29
  30 struct ehci_sunxi_priv {
  31         struct ehci_ctrl ehci;
  32         struct sunxi_ccm_reg *ccm;
  33         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
  34         struct phy phy;
  35         const struct ehci_sunxi_cfg *cfg;
  36 };
  37
  38 static int ehci_usb_probe(struct udevice *dev)
  39 {
  40         struct usb_platdata *plat = dev_get_platdata(dev);
  41         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
  42         struct ehci_hccr *hccr = (struct ehci_hccr *)devfdt_get_addr(dev);
  43         struct ehci_hcor *hcor;
  44         int extra_ahb_gate_mask = 0;
  45         int phys, ret;
  46
  47         priv->cfg = (const struct ehci_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         /*
  78          * This should go away once we've moved to the driver model for
  79          * clocks resp. phys.
  80          */
  81         priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0;
  82         extra_ahb_gate_mask = priv->cfg->extra_ahb_gate_mask;
  83         priv->ahb_gate_mask <<= phys * AHB_CLK_DIST;
  84         extra_ahb_gate_mask <<= phys * AHB_CLK_DIST;
  85
  86         setbits_le32(&priv->ccm->ahb_gate0,
  87                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  88         if (priv->cfg->has_reset)
  89                 setbits_le32(&priv->ccm->ahb_reset0_cfg,
  90                              priv->ahb_gate_mask | extra_ahb_gate_mask);
  91
  92         hcor = (struct ehci_hcor *)((uintptr_t)hccr +
  93                                     HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  94
  95         return ehci_register(dev, hccr, hcor, NULL, 0, plat->init_type);
  96 }
  97
  98 static int ehci_usb_remove(struct udevice *dev)
  99 {
 100         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
 101         int ret;
 102
 103         if (generic_phy_valid(&priv->phy)) {
 104                 ret = generic_phy_exit(&priv->phy);
 105                 if (ret) {
 106                         pr_err("failed to exit %s USB PHY\n", dev->name);
 107                         return ret;
 108                 }
 109         }
 110
 111         ret = ehci_deregister(dev);
 112         if (ret)
 113                 return ret;
 114
 115         if (priv->cfg->has_reset)
 116                 clrbits_le32(&priv->ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
 117         clrbits_le32(&priv->ccm->ahb_gate0, priv->ahb_gate_mask);
 118
 119         return 0;
 120 }
 121
 122 static const struct ehci_sunxi_cfg sun4i_a10_cfg = {
 123         .has_reset = false,
 124 };
 125
 126 static const struct ehci_sunxi_cfg sun6i_a31_cfg = {
 127         .has_reset = true,
 128 };
 129
 130 static const struct ehci_sunxi_cfg sun8i_h3_cfg = {
 131         .has_reset = true,
 132         .extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0,
 133 };
 134
 135 static const struct udevice_id ehci_usb_ids[] = {
 136         {
 137                 .compatible = "allwinner,sun4i-a10-ehci",
 138                 .data = (ulong)&sun4i_a10_cfg,
 139         },
 140         {
 141                 .compatible = "allwinner,sun5i-a13-ehci",
 142                 .data = (ulong)&sun4i_a10_cfg,
 143         },
 144         {
 145                 .compatible = "allwinner,sun6i-a31-ehci",
 146                 .data = (ulong)&sun6i_a31_cfg,
 147         },
 148         {
 149                 .compatible = "allwinner,sun7i-a20-ehci",
 150                 .data = (ulong)&sun4i_a10_cfg,
 151         },
 152         {
 153                 .compatible = "allwinner,sun8i-a23-ehci",
 154                 .data = (ulong)&sun6i_a31_cfg,
 155         },
 156         {
 157                 .compatible = "allwinner,sun8i-a83t-ehci",
 158                 .data = (ulong)&sun6i_a31_cfg,
 159         },
 160         {
 161                 .compatible = "allwinner,sun8i-h3-ehci",
 162                 .data = (ulong)&sun8i_h3_cfg,
 163         },
 164         {
 165                 .compatible = "allwinner,sun9i-a80-ehci",
 166                 .data = (ulong)&sun6i_a31_cfg,
 167         },
 168         {
 169                 .compatible = "allwinner,sun50i-a64-ehci",
 170                 .data = (ulong)&sun8i_h3_cfg,
 171         },
 172         { /* sentinel */ }
 173 };
 174
 175 U_BOOT_DRIVER(ehci_sunxi) = {
 176         .name   = "ehci_sunxi",
 177         .id     = UCLASS_USB,
 178         .of_match = ehci_usb_ids,
 179         .probe = ehci_usb_probe,
 180         .remove = ehci_usb_remove,
 181         .ops    = &ehci_usb_ops,
 182         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 183         .priv_auto_alloc_size = sizeof(struct ehci_sunxi_priv),
 184         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 185 };