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         int extra_ahb_gate_mask = 0;
  42
  43         bus_priv->companion = true;
  44
  45         /*
  46          * This should go away once we've moved to the driver model for
  47          * clocks resp. phys.
  48          */
  49         priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0;
  50 #ifdef CONFIG_MACH_SUN8I_H3
  51         extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0;
  52 #endif
  53         priv->usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK;
  54         priv->phy_index = ((uintptr_t)regs - (SUNXI_USB1_BASE + 0x400)) / BASE_DIST;
  55         priv->ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
  56         extra_ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
  57         priv->usb_gate_mask <<= priv->phy_index;
  58         priv->phy_index++; /* Non otg phys start at 1 */
  59
  60         setbits_le32(&ccm->ahb_gate0,
  61                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  62         setbits_le32(&ccm->usb_clk_cfg, priv->usb_gate_mask);
  63 #ifdef CONFIG_SUNXI_GEN_SUN6I
  64         setbits_le32(&ccm->ahb_reset0_cfg,
  65                      priv->ahb_gate_mask | extra_ahb_gate_mask);
  66 #endif
  67
  68         sunxi_usb_phy_init(priv->phy_index);
  69         sunxi_usb_phy_power_on(priv->phy_index);
  70
  71         return ohci_register(dev, regs);
  72 }
  73
  74 static int ohci_usb_remove(struct udevice *dev)
  75 {
  76         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  77         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
  78         int ret;
  79
  80         ret = ohci_deregister(dev);
  81         if (ret)
  82                 return ret;
  83
  84         sunxi_usb_phy_exit(priv->phy_index);
  85
  86 #ifdef CONFIG_SUNXI_GEN_SUN6I
  87         clrbits_le32(&ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
  88 #endif
  89         clrbits_le32(&ccm->usb_clk_cfg, priv->usb_gate_mask);
  90         clrbits_le32(&ccm->ahb_gate0, priv->ahb_gate_mask);
  91
  92         return 0;
  93 }
  94
  95 static const struct udevice_id ohci_usb_ids[] = {
  96         { .compatible = "allwinner,sun4i-a10-ohci", },
  97         { .compatible = "allwinner,sun5i-a13-ohci", },
  98         { .compatible = "allwinner,sun6i-a31-ohci", },
  99         { .compatible = "allwinner,sun7i-a20-ohci", },
 100         { .compatible = "allwinner,sun8i-a23-ohci", },
 101         { .compatible = "allwinner,sun8i-a83t-ohci", },
 102         { .compatible = "allwinner,sun8i-h3-ohci",  },
 103         { .compatible = "allwinner,sun9i-a80-ohci", },
 104         { .compatible = "allwinner,sun50i-a64-ohci", },
 105         { }
 106 };
 107
 108 U_BOOT_DRIVER(usb_ohci) = {
 109         .name   = "ohci_sunxi",
 110         .id     = UCLASS_USB,
 111         .of_match = ohci_usb_ids,
 112         .probe = ohci_usb_probe,
 113         .remove = ohci_usb_remove,
 114         .ops    = &ohci_usb_ops,
 115         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 116         .priv_auto_alloc_size = sizeof(struct ohci_sunxi_priv),
 117         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 118 };