1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2018 Ramon Fried <ramon.fried@gmail.com> 4 */ 5 6 #include <common.h> 7 #include <dm.h> 8 #include <generic-phy.h> 9 #include <usb/ehci-ci.h> 10 #include <usb/ulpi.h> 11 #include <asm/io.h> 12 13 /* PHY viewport regs */ 14 #define ULPI_MISC_A_READ 0x96 15 #define ULPI_MISC_A_SET 0x97 16 #define ULPI_MISC_A_CLEAR 0x98 17 #define ULPI_MISC_A_VBUSVLDEXT BIT(0) 18 #define ULPI_MISC_A_VBUSVLDEXTSEL BIT(1) 19 #define GEN2_SESS_VLD_CTRL_EN BIT(7) 20 #define SESS_VLD_CTRL BIT(25) 21 22 struct msm_phy_priv { 23 void __iomem *regs; 24 struct usb_ehci *ehci; /* Start of IP core*/ 25 struct ulpi_viewport ulpi_vp; /* ULPI Viewport */ 26 }; 27 28 static int msm_phy_power_on(struct phy *phy) 29 { 30 struct msm_phy_priv *priv = dev_get_priv(phy->dev); 31 32 /* Select and enable external configuration with USB PHY */ 33 ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_SET, 34 ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT); 35 36 return 0; 37 } 38 39 static int msm_phy_power_off(struct phy *phy) 40 { 41 struct msm_phy_priv *priv = dev_get_priv(phy->dev); 42 43 /* Disable VBUS mimicing in the controller. */ 44 ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_CLEAR, 45 ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT); 46 return 0; 47 } 48 49 static int msm_phy_reset(struct phy *phy) 50 { 51 struct msm_phy_priv *p = dev_get_priv(phy->dev); 52 53 /* select ULPI phy */ 54 writel(PORT_PTS_ULPI, &p->ehci->portsc); 55 56 /* Enable sess_vld */ 57 setbits_le32(&p->ehci->genconfig2, GEN2_SESS_VLD_CTRL_EN); 58 59 /* Enable external vbus configuration in the LINK */ 60 setbits_le32(&p->ehci->usbcmd, SESS_VLD_CTRL); 61 62 /* USB_OTG_HS_AHB_BURST */ 63 writel(0x0, &p->ehci->sbuscfg); 64 65 /* USB_OTG_HS_AHB_MODE: HPROT_MODE */ 66 /* Bus access related config. */ 67 writel(0x08, &p->ehci->sbusmode); 68 69 return 0; 70 } 71 72 static int msm_phy_probe(struct udevice *dev) 73 { 74 struct msm_phy_priv *priv = dev_get_priv(dev); 75 76 priv->regs = dev_remap_addr(dev); 77 if (!priv->regs) 78 return -EINVAL; 79 80 priv->ehci = (struct usb_ehci *)priv->regs; 81 priv->ulpi_vp.port_num = 0; 82 83 /* Warning: this will not work if viewport address is > 64 bit due to 84 * ULPI design. 85 */ 86 priv->ulpi_vp.viewport_addr = (phys_addr_t)&priv->ehci->ulpi_viewpoint; 87 88 return 0; 89 } 90 91 static struct phy_ops msm_phy_ops = { 92 .power_on = msm_phy_power_on, 93 .power_off = msm_phy_power_off, 94 .reset = msm_phy_reset, 95 }; 96 97 static const struct udevice_id msm_phy_ids[] = { 98 { .compatible = "qcom,apq8016-usbphy" }, 99 { } 100 }; 101 102 U_BOOT_DRIVER(msm8916_usbphy) = { 103 .name = "msm8916_usbphy", 104 .id = UCLASS_PHY, 105 .of_match = msm_phy_ids, 106 .ops = &msm_phy_ops, 107 .probe = msm_phy_probe, 108 .priv_auto_alloc_size = sizeof(struct msm_phy_priv), 109 }; 110