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 struct sunxi_ccm_reg *ccm; 30 ohci_t ohci; 31 int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */ 32 int usb_gate_mask; /* Mask of usb_clk_cfg clk gate bits for this hcd */ 33 int phy_index; /* Index of the usb-phy attached to this hcd */ 34 }; 35 36 static int ohci_usb_probe(struct udevice *dev) 37 { 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 *)devfdt_get_addr(dev); 41 int extra_ahb_gate_mask = 0; 42 43 priv->ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; 44 if (IS_ERR(priv->ccm)) 45 return PTR_ERR(priv->ccm); 46 47 bus_priv->companion = true; 48 49 /* 50 * This should go away once we've moved to the driver model for 51 * clocks resp. phys. 52 */ 53 priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0; 54 #ifdef CONFIG_MACH_SUN8I_H3 55 extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0; 56 #endif 57 priv->usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK; 58 priv->phy_index = ((uintptr_t)regs - (SUNXI_USB1_BASE + 0x400)) / BASE_DIST; 59 priv->ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST; 60 extra_ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST; 61 priv->usb_gate_mask <<= priv->phy_index; 62 priv->phy_index++; /* Non otg phys start at 1 */ 63 64 setbits_le32(&priv->ccm->ahb_gate0, 65 priv->ahb_gate_mask | extra_ahb_gate_mask); 66 setbits_le32(&priv->ccm->usb_clk_cfg, priv->usb_gate_mask); 67 #ifdef CONFIG_SUNXI_GEN_SUN6I 68 setbits_le32(&priv->ccm->ahb_reset0_cfg, 69 priv->ahb_gate_mask | extra_ahb_gate_mask); 70 #endif 71 72 sunxi_usb_phy_init(priv->phy_index); 73 sunxi_usb_phy_power_on(priv->phy_index); 74 75 return ohci_register(dev, regs); 76 } 77 78 static int ohci_usb_remove(struct udevice *dev) 79 { 80 struct ohci_sunxi_priv *priv = dev_get_priv(dev); 81 int ret; 82 83 ret = ohci_deregister(dev); 84 if (ret) 85 return ret; 86 87 sunxi_usb_phy_exit(priv->phy_index); 88 89 #ifdef CONFIG_SUNXI_GEN_SUN6I 90 clrbits_le32(&priv->ccm->ahb_reset0_cfg, priv->ahb_gate_mask); 91 #endif 92 clrbits_le32(&priv->ccm->usb_clk_cfg, priv->usb_gate_mask); 93 clrbits_le32(&priv->ccm->ahb_gate0, priv->ahb_gate_mask); 94 95 return 0; 96 } 97 98 static const struct udevice_id ohci_usb_ids[] = { 99 { .compatible = "allwinner,sun4i-a10-ohci", }, 100 { .compatible = "allwinner,sun5i-a13-ohci", }, 101 { .compatible = "allwinner,sun6i-a31-ohci", }, 102 { .compatible = "allwinner,sun7i-a20-ohci", }, 103 { .compatible = "allwinner,sun8i-a23-ohci", }, 104 { .compatible = "allwinner,sun8i-a83t-ohci", }, 105 { .compatible = "allwinner,sun8i-h3-ohci", }, 106 { .compatible = "allwinner,sun9i-a80-ohci", }, 107 { .compatible = "allwinner,sun50i-a64-ohci", }, 108 { } 109 }; 110 111 U_BOOT_DRIVER(usb_ohci) = { 112 .name = "ohci_sunxi", 113 .id = UCLASS_USB, 114 .of_match = ohci_usb_ids, 115 .probe = ohci_usb_probe, 116 .remove = ohci_usb_remove, 117 .ops = &ohci_usb_ops, 118 .platdata_auto_alloc_size = sizeof(struct usb_platdata), 119 .priv_auto_alloc_size = sizeof(struct ohci_sunxi_priv), 120 .flags = DM_FLAG_ALLOC_PRIV_DMA, 121 }; 122