| Ramon Fried | 019fb8c | 2018-09-21 13:35:47 +0300 | [diff] [blame] | 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 | }; |