drivers/usb/host/ehci-sunxi.c

   1 /*
   2  * Sunxi ehci glue
   3  *
   4  * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
   5  * Copyright (C) 2014 Roman Byshko <rbyshko@gmail.com>
   6  *
   7  * Based on code from
   8  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12
  13 #include <common.h>
  14 #include <asm/arch/clock.h>
  15 #include <asm/arch/usb_phy.h>
  16 #include <asm/io.h>
  17 #include <dm.h>
  18 #include "ehci.h"
  19
  20 struct ehci_sunxi_priv {
  21         struct ehci_ctrl ehci;
  22         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
  23         int phy_index;     /* Index of the usb-phy attached to this hcd */
  24 };
  25
  26 static int ehci_usb_probe(struct udevice *dev)
  27 {
  28         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  29         struct usb_platdata *plat = dev_get_platdata(dev);
  30         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
  31         struct ehci_hccr *hccr = (struct ehci_hccr *)dev_get_addr(dev);
  32         struct ehci_hcor *hcor;
  33
  34         /*
  35          * This should go away once we've moved to the driver model for
  36          * clocks resp. phys.
  37          */
  38         if (hccr == (void *)SUNXI_USB1_BASE) {
  39                 priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0;
  40                 priv->phy_index = 1;
  41         } else {
  42                 priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI1;
  43                 priv->phy_index = 2;
  44         }
  45
  46         setbits_le32(&ccm->ahb_gate0, priv->ahb_gate_mask);
  47 #ifdef CONFIG_SUNXI_GEN_SUN6I
  48         setbits_le32(&ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
  49 #endif
  50
  51         sunxi_usb_phy_init(priv->phy_index);
  52         sunxi_usb_phy_power_on(priv->phy_index);
  53
  54         hcor = (struct ehci_hcor *)((uint32_t)hccr +
  55                                     HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  56
  57         return ehci_register(dev, hccr, hcor, NULL, 0, plat->init_type);
  58 }
  59
  60 static int ehci_usb_remove(struct udevice *dev)
  61 {
  62         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  63         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
  64         int ret;
  65
  66         ret = ehci_deregister(dev);
  67         if (ret)
  68                 return ret;
  69
  70         sunxi_usb_phy_exit(priv->phy_index);
  71
  72 #ifdef CONFIG_SUNXI_GEN_SUN6I
  73         clrbits_le32(&ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
  74 #endif
  75         clrbits_le32(&ccm->ahb_gate0, priv->ahb_gate_mask);
  76
  77         return 0;
  78 }
  79
  80 static const struct udevice_id ehci_usb_ids[] = {
  81         { .compatible = "allwinner,sun4i-a10-ehci", },
  82         { .compatible = "allwinner,sun5i-a13-ehci", },
  83         { .compatible = "allwinner,sun6i-a31-ehci", },
  84         { .compatible = "allwinner,sun7i-a20-ehci", },
  85         { .compatible = "allwinner,sun8i-a23-ehci", },
  86         { .compatible = "allwinner,sun9i-a80-ehci", },
  87         { }
  88 };
  89
  90 U_BOOT_DRIVER(ehci_sunxi) = {
  91         .name   = "ehci_sunxi",
  92         .id     = UCLASS_USB,
  93         .of_match = ehci_usb_ids,
  94         .probe = ehci_usb_probe,
  95         .remove = ehci_usb_remove,
  96         .ops    = &ehci_usb_ops,
  97         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
  98         .priv_auto_alloc_size = sizeof(struct ehci_sunxi_priv),
  99         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 100 };