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_priv {
  26         struct sunxi_ccm_reg *ccm;
  27         ohci_t ohci;
  28         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
  29         int usb_gate_mask; /* Mask of usb_clk_cfg clk gate bits for this hcd */
  30         struct phy phy;
  31 };
  32
  33 static int ohci_usb_probe(struct udevice *dev)
  34 {
  35         struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
  36         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
  37         struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
  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         bus_priv->companion = true;
  71
  72         /*
  73          * This should go away once we've moved to the driver model for
  74          * clocks resp. phys.
  75          */
  76         priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0;
  77 #ifdef CONFIG_MACH_SUN8I_H3
  78         extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0;
  79 #endif
  80         priv->usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK;
  81         priv->ahb_gate_mask <<= phys * AHB_CLK_DIST;
  82         extra_ahb_gate_mask <<= phys * AHB_CLK_DIST;
  83         priv->usb_gate_mask <<= phys;
  84
  85         setbits_le32(&priv->ccm->ahb_gate0,
  86                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  87         setbits_le32(&priv->ccm->usb_clk_cfg, priv->usb_gate_mask);
  88 #ifdef CONFIG_SUNXI_GEN_SUN6I
  89         setbits_le32(&priv->ccm->ahb_reset0_cfg,
  90                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  91 #endif
  92
  93         return ohci_register(dev, regs);
  94 }
  95
  96 static int ohci_usb_remove(struct udevice *dev)
  97 {
  98         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
  99         int ret;
 100
 101         if (generic_phy_valid(&priv->phy)) {
 102                 ret = generic_phy_exit(&priv->phy);
 103                 if (ret) {
 104                         pr_err("failed to exit %s USB PHY\n", dev->name);
 105                         return ret;
 106                 }
 107         }
 108
 109         ret = ohci_deregister(dev);
 110         if (ret)
 111                 return ret;
 112
 113 #ifdef CONFIG_SUNXI_GEN_SUN6I
 114         clrbits_le32(&priv->ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
 115 #endif
 116         clrbits_le32(&priv->ccm->usb_clk_cfg, priv->usb_gate_mask);
 117         clrbits_le32(&priv->ccm->ahb_gate0, priv->ahb_gate_mask);
 118
 119         return 0;
 120 }
 121
 122 static const struct udevice_id ohci_usb_ids[] = {
 123         { .compatible = "allwinner,sun4i-a10-ohci", },
 124         { .compatible = "allwinner,sun5i-a13-ohci", },
 125         { .compatible = "allwinner,sun6i-a31-ohci", },
 126         { .compatible = "allwinner,sun7i-a20-ohci", },
 127         { .compatible = "allwinner,sun8i-a23-ohci", },
 128         { .compatible = "allwinner,sun8i-a83t-ohci", },
 129         { .compatible = "allwinner,sun8i-h3-ohci",  },
 130         { .compatible = "allwinner,sun9i-a80-ohci", },
 131         { .compatible = "allwinner,sun50i-a64-ohci", },
 132         { }
 133 };
 134
 135 U_BOOT_DRIVER(usb_ohci) = {
 136         .name   = "ohci_sunxi",
 137         .id     = UCLASS_USB,
 138         .of_match = ohci_usb_ids,
 139         .probe = ohci_usb_probe,
 140         .remove = ohci_usb_remove,
 141         .ops    = &ohci_usb_ops,
 142         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 143         .priv_auto_alloc_size = sizeof(struct ohci_sunxi_priv),
 144         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 145 };