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/arch/usb_phy.h>
  15 #include <asm/io.h>
  16 #include <dm.h>
  17 #include "ehci.h"
  18
  19 #ifdef CONFIG_SUNXI_GEN_SUN4I
  20 #define BASE_DIST               0x8000
  21 #define AHB_CLK_DIST            2
  22 #else
  23 #define BASE_DIST               0x1000
  24 #define AHB_CLK_DIST            1
  25 #endif
  26
  27 struct ehci_sunxi_priv {
  28         struct ehci_ctrl ehci;
  29         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
  30         int phy_index;     /* Index of the usb-phy attached to this hcd */
  31 };
  32
  33 static int ehci_usb_probe(struct udevice *dev)
  34 {
  35         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  36         struct usb_platdata *plat = dev_get_platdata(dev);
  37         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
  38         struct ehci_hccr *hccr = (struct ehci_hccr *)devfdt_get_addr(dev);
  39         struct ehci_hcor *hcor;
  40         int extra_ahb_gate_mask = 0;
  41
  42         /*
  43          * This should go away once we've moved to the driver model for
  44          * clocks resp. phys.
  45          */
  46         priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0;
  47 #if defined(CONFIG_MACH_SUNXI_H3_H5) || defined(CONFIG_MACH_SUN50I)
  48         extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0;
  49 #endif
  50         priv->phy_index = ((uintptr_t)hccr - SUNXI_USB1_BASE) / BASE_DIST;
  51         priv->ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
  52         extra_ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
  53         priv->phy_index++; /* Non otg phys start at 1 */
  54
  55         setbits_le32(&ccm->ahb_gate0,
  56                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  57 #ifdef CONFIG_SUNXI_GEN_SUN6I
  58         setbits_le32(&ccm->ahb_reset0_cfg,
  59                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  60 #endif
  61
  62         sunxi_usb_phy_init(priv->phy_index);
  63         sunxi_usb_phy_power_on(priv->phy_index);
  64
  65         hcor = (struct ehci_hcor *)((uintptr_t)hccr +
  66                                     HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  67
  68         return ehci_register(dev, hccr, hcor, NULL, 0, plat->init_type);
  69 }
  70
  71 static int ehci_usb_remove(struct udevice *dev)
  72 {
  73         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  74         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
  75         int ret;
  76
  77         ret = ehci_deregister(dev);
  78         if (ret)
  79                 return ret;
  80
  81         sunxi_usb_phy_exit(priv->phy_index);
  82
  83 #ifdef CONFIG_SUNXI_GEN_SUN6I
  84         clrbits_le32(&ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
  85 #endif
  86         clrbits_le32(&ccm->ahb_gate0, priv->ahb_gate_mask);
  87
  88         return 0;
  89 }
  90
  91 static const struct udevice_id ehci_usb_ids[] = {
  92         { .compatible = "allwinner,sun4i-a10-ehci", },
  93         { .compatible = "allwinner,sun5i-a13-ehci", },
  94         { .compatible = "allwinner,sun6i-a31-ehci", },
  95         { .compatible = "allwinner,sun7i-a20-ehci", },
  96         { .compatible = "allwinner,sun8i-a23-ehci", },
  97         { .compatible = "allwinner,sun8i-a83t-ehci", },
  98         { .compatible = "allwinner,sun8i-h3-ehci",  },
  99         { .compatible = "allwinner,sun9i-a80-ehci", },
 100         { .compatible = "allwinner,sun50i-a64-ehci", },
 101         { }
 102 };
 103
 104 U_BOOT_DRIVER(ehci_sunxi) = {
 105         .name   = "ehci_sunxi",
 106         .id     = UCLASS_USB,
 107         .of_match = ehci_usb_ids,
 108         .probe = ehci_usb_probe,
 109         .remove = ehci_usb_remove,
 110         .ops    = &ehci_usb_ops,
 111         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 112         .priv_auto_alloc_size = sizeof(struct ehci_sunxi_priv),
 113         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 114 };