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92454e47bc
Add a PHY driver for the Qualcomm dragonboard 410c which allows switching on/off and resetting the phy connected to the EHCI controllers and USBHS controller. Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018 Ramon Fried <ramon.fried@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <generic-phy.h>
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#include <usb/ehci-ci.h>
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#include <usb/ulpi.h>
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#include <asm/io.h>
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/* PHY viewport regs */
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#define ULPI_MISC_A_READ 0x96
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#define ULPI_MISC_A_SET 0x97
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#define ULPI_MISC_A_CLEAR 0x98
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#define ULPI_MISC_A_VBUSVLDEXT BIT(0)
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#define ULPI_MISC_A_VBUSVLDEXTSEL BIT(1)
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#define GEN2_SESS_VLD_CTRL_EN BIT(7)
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#define SESS_VLD_CTRL BIT(25)
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struct msm_phy_priv {
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void __iomem *regs;
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struct usb_ehci *ehci; /* Start of IP core*/
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struct ulpi_viewport ulpi_vp; /* ULPI Viewport */
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};
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static int msm_phy_power_on(struct phy *phy)
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{
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struct msm_phy_priv *priv = dev_get_priv(phy->dev);
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/* Select and enable external configuration with USB PHY */
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ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_SET,
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ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
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return 0;
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}
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static int msm_phy_power_off(struct phy *phy)
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{
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struct msm_phy_priv *priv = dev_get_priv(phy->dev);
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/* Disable VBUS mimicing in the controller. */
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ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_CLEAR,
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ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
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return 0;
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}
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static int msm_phy_reset(struct phy *phy)
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{
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struct msm_phy_priv *p = dev_get_priv(phy->dev);
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/* select ULPI phy */
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writel(PORT_PTS_ULPI, &p->ehci->portsc);
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/* Enable sess_vld */
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setbits_le32(&p->ehci->genconfig2, GEN2_SESS_VLD_CTRL_EN);
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/* Enable external vbus configuration in the LINK */
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setbits_le32(&p->ehci->usbcmd, SESS_VLD_CTRL);
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/* USB_OTG_HS_AHB_BURST */
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writel(0x0, &p->ehci->sbuscfg);
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/* USB_OTG_HS_AHB_MODE: HPROT_MODE */
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/* Bus access related config. */
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writel(0x08, &p->ehci->sbusmode);
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return 0;
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}
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static int msm_phy_probe(struct udevice *dev)
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{
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struct msm_phy_priv *priv = dev_get_priv(dev);
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priv->regs = dev_remap_addr(dev);
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if (!priv->regs)
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return -EINVAL;
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priv->ehci = (struct usb_ehci *)priv->regs;
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priv->ulpi_vp.port_num = 0;
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/* Warning: this will not work if viewport address is > 64 bit due to
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* ULPI design.
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*/
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priv->ulpi_vp.viewport_addr = (phys_addr_t)&priv->ehci->ulpi_viewpoint;
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return 0;
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}
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static struct phy_ops msm_phy_ops = {
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.power_on = msm_phy_power_on,
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.power_off = msm_phy_power_off,
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.reset = msm_phy_reset,
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};
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static const struct udevice_id msm_phy_ids[] = {
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{ .compatible = "qcom,apq8016-usbphy" },
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{ }
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};
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U_BOOT_DRIVER(msm8916_usbphy) = {
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.name = "msm8916_usbphy",
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.id = UCLASS_PHY,
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.of_match = msm_phy_ids,
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.ops = &msm_phy_ops,
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.probe = msm_phy_probe,
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.priv_auto_alloc_size = sizeof(struct msm_phy_priv),
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};
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