drivers/usb/host/ohci-sunxi.c

   1 /*
   2  * Sunxi ohci glue
   3  *
   4  * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
   5  *
   6  * Based on code from
   7  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
   8  *
   9  * SPDX-License-Identifier:     GPL-2.0+
  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 <usb.h>
  18 #include "ohci.h"
  19
  20 struct ohci_sunxi_priv {
  21         ohci_t ohci;
  22         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
  23         int usb_gate_mask; /* Mask of usb_clk_cfg clk gate bits for this hcd */
  24         int phy_index;     /* Index of the usb-phy attached to this hcd */
  25 };
  26
  27 static int ohci_usb_probe(struct udevice *dev)
  28 {
  29         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  30         struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
  31         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
  32         struct ohci_regs *regs = (struct ohci_regs *)dev_get_addr(dev);
  33
  34         bus_priv->companion = true;
  35
  36         /*
  37          * This should go away once we've moved to the driver model for
  38          * clocks resp. phys.
  39          */
  40         if (regs == (void *)(SUNXI_USB1_BASE + 0x400)) {
  41                 priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0;
  42                 priv->usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK;
  43                 priv->phy_index = 1;
  44         } else {
  45                 priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI1;
  46                 priv->usb_gate_mask = CCM_USB_CTRL_OHCI1_CLK;
  47                 priv->phy_index = 2;
  48         }
  49
  50         setbits_le32(&ccm->ahb_gate0, priv->ahb_gate_mask);
  51         setbits_le32(&ccm->usb_clk_cfg, priv->usb_gate_mask);
  52 #ifdef CONFIG_SUNXI_GEN_SUN6I
  53         setbits_le32(&ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
  54 #endif
  55
  56         sunxi_usb_phy_init(priv->phy_index);
  57         sunxi_usb_phy_power_on(priv->phy_index);
  58
  59         return ohci_register(dev, regs);
  60 }
  61
  62 static int ohci_usb_remove(struct udevice *dev)
  63 {
  64         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  65         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
  66         int ret;
  67
  68         ret = ohci_deregister(dev);
  69         if (ret)
  70                 return ret;
  71
  72         sunxi_usb_phy_exit(priv->phy_index);
  73
  74 #ifdef CONFIG_SUNXI_GEN_SUN6I
  75         clrbits_le32(&ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
  76 #endif
  77         clrbits_le32(&ccm->usb_clk_cfg, priv->usb_gate_mask);
  78         clrbits_le32(&ccm->ahb_gate0, priv->ahb_gate_mask);
  79
  80         return 0;
  81 }
  82
  83 static const struct udevice_id ohci_usb_ids[] = {
  84         { .compatible = "allwinner,sun4i-a10-ohci", },
  85         { .compatible = "allwinner,sun5i-a13-ohci", },
  86         { .compatible = "allwinner,sun6i-a31-ohci", },
  87         { .compatible = "allwinner,sun7i-a20-ohci", },
  88         { .compatible = "allwinner,sun8i-a23-ohci", },
  89         { .compatible = "allwinner,sun9i-a80-ohci", },
  90         { }
  91 };
  92
  93 U_BOOT_DRIVER(usb_ohci) = {
  94         .name   = "ohci_sunxi",
  95         .id     = UCLASS_USB,
  96         .of_match = ohci_usb_ids,
  97         .probe = ohci_usb_probe,
  98         .remove = ohci_usb_remove,
  99         .ops    = &ohci_usb_ops,
 100         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 101         .priv_auto_alloc_size = sizeof(struct ohci_sunxi_priv),
 102         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 103 };