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 #define SUN6I_AHB_RESET0_CFG_OFFSET 0x2c0
  26 #define SUN9I_AHB_RESET0_CFG_OFFSET 0x5a0
  27
  28 struct ehci_sunxi_cfg {
  29         bool has_reset;
  30         u32 extra_ahb_gate_mask;
  31         u32 reset0_cfg_offset;
  32 };
  33
  34 struct ehci_sunxi_priv {
  35         struct ehci_ctrl ehci;
  36         struct sunxi_ccm_reg *ccm;
  37         u32 *reset0_cfg;
  38         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
  39         struct phy phy;
  40         const struct ehci_sunxi_cfg *cfg;
  41 };
  42
  43 static int ehci_usb_probe(struct udevice *dev)
  44 {
  45         struct usb_platdata *plat = dev_get_platdata(dev);
  46         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
  47         struct ehci_hccr *hccr = (struct ehci_hccr *)devfdt_get_addr(dev);
  48         struct ehci_hcor *hcor;
  49         int extra_ahb_gate_mask = 0;
  50         int phys, ret;
  51
  52         priv->cfg = (const struct ehci_sunxi_cfg *)dev_get_driver_data(dev);
  53         priv->ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  54         if (IS_ERR(priv->ccm))
  55                 return PTR_ERR(priv->ccm);
  56
  57         priv->reset0_cfg = (void *)priv->ccm +
  58                                    priv->cfg->reset0_cfg_offset;
  59
  60         phys = dev_count_phandle_with_args(dev, "phys", "#phy-cells");
  61         if (phys < 0) {
  62                 phys = 0;
  63                 goto no_phy;
  64         }
  65
  66         ret = generic_phy_get_by_name(dev, "usb", &priv->phy);
  67         if (ret) {
  68                 pr_err("failed to get %s usb PHY\n", dev->name);
  69                 return ret;
  70         }
  71
  72         ret = generic_phy_init(&priv->phy);
  73         if (ret) {
  74                 pr_err("failed to init %s USB PHY\n", dev->name);
  75                 return ret;
  76         }
  77
  78         ret = generic_phy_power_on(&priv->phy);
  79         if (ret) {
  80                 pr_err("failed to power on %s USB PHY\n", dev->name);
  81                 return ret;
  82         }
  83
  84 no_phy:
  85         /*
  86          * This should go away once we've moved to the driver model for
  87          * clocks resp. phys.
  88          */
  89         priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0;
  90         extra_ahb_gate_mask = priv->cfg->extra_ahb_gate_mask;
  91         priv->ahb_gate_mask <<= phys * AHB_CLK_DIST;
  92         extra_ahb_gate_mask <<= phys * AHB_CLK_DIST;
  93
  94         setbits_le32(&priv->ccm->ahb_gate0,
  95                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  96         if (priv->cfg->has_reset)
  97                 setbits_le32(priv->reset0_cfg,
  98                              priv->ahb_gate_mask | extra_ahb_gate_mask);
  99
 100         hcor = (struct ehci_hcor *)((uintptr_t)hccr +
 101                                     HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
 102
 103         return ehci_register(dev, hccr, hcor, NULL, 0, plat->init_type);
 104 }
 105
 106 static int ehci_usb_remove(struct udevice *dev)
 107 {
 108         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
 109         int ret;
 110
 111         if (generic_phy_valid(&priv->phy)) {
 112                 ret = generic_phy_exit(&priv->phy);
 113                 if (ret) {
 114                         pr_err("failed to exit %s USB PHY\n", dev->name);
 115                         return ret;
 116                 }
 117         }
 118
 119         ret = ehci_deregister(dev);
 120         if (ret)
 121                 return ret;
 122
 123         if (priv->cfg->has_reset)
 124                 clrbits_le32(priv->reset0_cfg, priv->ahb_gate_mask);
 125         clrbits_le32(&priv->ccm->ahb_gate0, priv->ahb_gate_mask);
 126
 127         return 0;
 128 }
 129
 130 static const struct ehci_sunxi_cfg sun4i_a10_cfg = {
 131         .has_reset = false,
 132 };
 133
 134 static const struct ehci_sunxi_cfg sun6i_a31_cfg = {
 135         .has_reset = true,
 136         .reset0_cfg_offset = SUN6I_AHB_RESET0_CFG_OFFSET,
 137 };
 138
 139 static const struct ehci_sunxi_cfg sun8i_h3_cfg = {
 140         .has_reset = true,
 141         .extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0,
 142         .reset0_cfg_offset = SUN6I_AHB_RESET0_CFG_OFFSET,
 143 };
 144
 145 static const struct ehci_sunxi_cfg sun9i_a80_cfg = {
 146         .has_reset = true,
 147         .reset0_cfg_offset = SUN9I_AHB_RESET0_CFG_OFFSET,
 148 };
 149
 150 static const struct udevice_id ehci_usb_ids[] = {
 151         {
 152                 .compatible = "allwinner,sun4i-a10-ehci",
 153                 .data = (ulong)&sun4i_a10_cfg,
 154         },
 155         {
 156                 .compatible = "allwinner,sun5i-a13-ehci",
 157                 .data = (ulong)&sun4i_a10_cfg,
 158         },
 159         {
 160                 .compatible = "allwinner,sun6i-a31-ehci",
 161                 .data = (ulong)&sun6i_a31_cfg,
 162         },
 163         {
 164                 .compatible = "allwinner,sun7i-a20-ehci",
 165                 .data = (ulong)&sun4i_a10_cfg,
 166         },
 167         {
 168                 .compatible = "allwinner,sun8i-a23-ehci",
 169                 .data = (ulong)&sun6i_a31_cfg,
 170         },
 171         {
 172                 .compatible = "allwinner,sun8i-a83t-ehci",
 173                 .data = (ulong)&sun6i_a31_cfg,
 174         },
 175         {
 176                 .compatible = "allwinner,sun8i-h3-ehci",
 177                 .data = (ulong)&sun8i_h3_cfg,
 178         },
 179         {
 180                 .compatible = "allwinner,sun9i-a80-ehci",
 181                 .data = (ulong)&sun9i_a80_cfg,
 182         },
 183         {
 184                 .compatible = "allwinner,sun50i-a64-ehci",
 185                 .data = (ulong)&sun8i_h3_cfg,
 186         },
 187         { /* sentinel */ }
 188 };
 189
 190 U_BOOT_DRIVER(ehci_sunxi) = {
 191         .name   = "ehci_sunxi",
 192         .id     = UCLASS_USB,
 193         .of_match = ehci_usb_ids,
 194         .probe = ehci_usb_probe,
 195         .remove = ehci_usb_remove,
 196         .ops    = &ehci_usb_ops,
 197         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 198         .priv_auto_alloc_size = sizeof(struct ehci_sunxi_priv),
 199         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 200 };