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 #ifdef CONFIG_SUNXI_GEN_SUN4I
  21 #define BASE_DIST               0x8000
  22 #define AHB_CLK_DIST            2
  23 #else
  24 #define BASE_DIST               0x1000
  25 #define AHB_CLK_DIST            1
  26 #endif
  27
  28 struct ohci_sunxi_priv {
  29         ohci_t ohci;
  30         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
  31         int usb_gate_mask; /* Mask of usb_clk_cfg clk gate bits for this hcd */
  32         int phy_index;     /* Index of the usb-phy attached to this hcd */
  33 };
  34
  35 static int ohci_usb_probe(struct udevice *dev)
  36 {
  37         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  38         struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
  39         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
  40         struct ohci_regs *regs = (struct ohci_regs *)dev_get_addr(dev);
  41
  42         bus_priv->companion = true;
  43
  44         /*
  45          * This should go away once we've moved to the driver model for
  46          * clocks resp. phys.
  47          */
  48         priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0;
  49 #ifdef CONFIG_MACH_SUN8I_H3
  50         priv->ahb_gate_mask |= 1 << AHB_GATE_OFFSET_USB_EHCI0;
  51 #endif
  52         priv->usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK;
  53         priv->phy_index = ((u32)regs - (SUNXI_USB1_BASE + 0x400)) / BASE_DIST;
  54         priv->ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
  55         priv->usb_gate_mask <<= priv->phy_index;
  56         priv->phy_index++; /* Non otg phys start at 1 */
  57
  58         setbits_le32(&ccm->ahb_gate0, priv->ahb_gate_mask);
  59         setbits_le32(&ccm->usb_clk_cfg, priv->usb_gate_mask);
  60 #ifdef CONFIG_SUNXI_GEN_SUN6I
  61         setbits_le32(&ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
  62 #endif
  63
  64         sunxi_usb_phy_init(priv->phy_index);
  65         sunxi_usb_phy_power_on(priv->phy_index);
  66
  67         return ohci_register(dev, regs);
  68 }
  69
  70 static int ohci_usb_remove(struct udevice *dev)
  71 {
  72         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  73         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
  74         int ret;
  75
  76         ret = ohci_deregister(dev);
  77         if (ret)
  78                 return ret;
  79
  80         sunxi_usb_phy_exit(priv->phy_index);
  81
  82 #ifdef CONFIG_SUNXI_GEN_SUN6I
  83         clrbits_le32(&ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
  84 #endif
  85         clrbits_le32(&ccm->usb_clk_cfg, priv->usb_gate_mask);
  86         clrbits_le32(&ccm->ahb_gate0, priv->ahb_gate_mask);
  87
  88         return 0;
  89 }
  90
  91 static const struct udevice_id ohci_usb_ids[] = {
  92         { .compatible = "allwinner,sun4i-a10-ohci", },
  93         { .compatible = "allwinner,sun5i-a13-ohci", },
  94         { .compatible = "allwinner,sun6i-a31-ohci", },
  95         { .compatible = "allwinner,sun7i-a20-ohci", },
  96         { .compatible = "allwinner,sun8i-a23-ohci", },
  97         { .compatible = "allwinner,sun8i-h3-ohci",  },
  98         { .compatible = "allwinner,sun9i-a80-ohci", },
  99         { }
 100 };
 101
 102 U_BOOT_DRIVER(usb_ohci) = {
 103         .name   = "ohci_sunxi",
 104         .id     = UCLASS_USB,
 105         .of_match = ohci_usb_ids,
 106         .probe = ohci_usb_probe,
 107         .remove = ohci_usb_remove,
 108         .ops    = &ohci_usb_ops,
 109         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 110         .priv_auto_alloc_size = sizeof(struct ohci_sunxi_priv),
 111         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 112 };