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_priv {
  26         struct ehci_ctrl ehci;
  27         struct sunxi_ccm_reg *ccm;
  28         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
  29         struct phy phy;
  30 };
  31
  32 static int ehci_usb_probe(struct udevice *dev)
  33 {
  34         struct usb_platdata *plat = dev_get_platdata(dev);
  35         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
  36         struct ehci_hccr *hccr = (struct ehci_hccr *)devfdt_get_addr(dev);
  37         struct ehci_hcor *hcor;
  38         int extra_ahb_gate_mask = 0;
  39         int phys, ret;
  40
  41         priv->ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  42         if (IS_ERR(priv->ccm))
  43                 return PTR_ERR(priv->ccm);
  44
  45         phys = dev_count_phandle_with_args(dev, "phys", "#phy-cells");
  46         if (phys < 0) {
  47                 phys = 0;
  48                 goto no_phy;
  49         }
  50
  51         ret = generic_phy_get_by_name(dev, "usb", &priv->phy);
  52         if (ret) {
  53                 pr_err("failed to get %s usb PHY\n", dev->name);
  54                 return ret;
  55         }
  56
  57         ret = generic_phy_init(&priv->phy);
  58         if (ret) {
  59                 pr_err("failed to init %s USB PHY\n", dev->name);
  60                 return ret;
  61         }
  62
  63         ret = generic_phy_power_on(&priv->phy);
  64         if (ret) {
  65                 pr_err("failed to power on %s USB PHY\n", dev->name);
  66                 return ret;
  67         }
  68
  69 no_phy:
  70         /*
  71          * This should go away once we've moved to the driver model for
  72          * clocks resp. phys.
  73          */
  74         priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0;
  75 #if defined(CONFIG_MACH_SUNXI_H3_H5) || defined(CONFIG_MACH_SUN50I)
  76         extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0;
  77 #endif
  78         priv->ahb_gate_mask <<= phys * AHB_CLK_DIST;
  79         extra_ahb_gate_mask <<= phys * AHB_CLK_DIST;
  80
  81         setbits_le32(&priv->ccm->ahb_gate0,
  82                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  83 #ifdef CONFIG_SUNXI_GEN_SUN6I
  84         setbits_le32(&priv->ccm->ahb_reset0_cfg,
  85                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  86 #endif
  87
  88         hcor = (struct ehci_hcor *)((uintptr_t)hccr +
  89                                     HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  90
  91         return ehci_register(dev, hccr, hcor, NULL, 0, plat->init_type);
  92 }
  93
  94 static int ehci_usb_remove(struct udevice *dev)
  95 {
  96         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
  97         int ret;
  98
  99         if (generic_phy_valid(&priv->phy)) {
 100                 ret = generic_phy_exit(&priv->phy);
 101                 if (ret) {
 102                         pr_err("failed to exit %s USB PHY\n", dev->name);
 103                         return ret;
 104                 }
 105         }
 106
 107         ret = ehci_deregister(dev);
 108         if (ret)
 109                 return ret;
 110
 111 #ifdef CONFIG_SUNXI_GEN_SUN6I
 112         clrbits_le32(&priv->ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
 113 #endif
 114         clrbits_le32(&priv->ccm->ahb_gate0, priv->ahb_gate_mask);
 115
 116         return 0;
 117 }
 118
 119 static const struct udevice_id ehci_usb_ids[] = {
 120         { .compatible = "allwinner,sun4i-a10-ehci", },
 121         { .compatible = "allwinner,sun5i-a13-ehci", },
 122         { .compatible = "allwinner,sun6i-a31-ehci", },
 123         { .compatible = "allwinner,sun7i-a20-ehci", },
 124         { .compatible = "allwinner,sun8i-a23-ehci", },
 125         { .compatible = "allwinner,sun8i-a83t-ehci", },
 126         { .compatible = "allwinner,sun8i-h3-ehci",  },
 127         { .compatible = "allwinner,sun9i-a80-ehci", },
 128         { .compatible = "allwinner,sun50i-a64-ehci", },
 129         { }
 130 };
 131
 132 U_BOOT_DRIVER(ehci_sunxi) = {
 133         .name   = "ehci_sunxi",
 134         .id     = UCLASS_USB,
 135         .of_match = ehci_usb_ids,
 136         .probe = ehci_usb_probe,
 137         .remove = ehci_usb_remove,
 138         .ops    = &ehci_usb_ops,
 139         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 140         .priv_auto_alloc_size = sizeof(struct ehci_sunxi_priv),
 141         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 142 };