msm8916-usbh-phy.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Ramon Fried <ramon.fried@gmail.com>
*/
#include <common.h>
#include <dm.h>
#include <generic-phy.h>
#include <usb/ehci-ci.h>
#include <usb/ulpi.h>
#include <asm/io.h>
/* PHY viewport regs */
#define ULPI_MISC_A_READ 0x96
#define ULPI_MISC_A_SET 0x97
#define ULPI_MISC_A_CLEAR 0x98
#define ULPI_MISC_A_VBUSVLDEXT BIT(0)
#define ULPI_MISC_A_VBUSVLDEXTSEL BIT(1)
#define GEN2_SESS_VLD_CTRL_EN BIT(7)
#define SESS_VLD_CTRL BIT(25)
struct msm_phy_priv {
void __iomem *regs;
struct usb_ehci *ehci; /* Start of IP core*/
struct ulpi_viewport ulpi_vp; /* ULPI Viewport */
};
static int msm_phy_power_on(struct phy *phy)
{
struct msm_phy_priv *priv = dev_get_priv(phy->dev);
/* Select and enable external configuration with USB PHY */
ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_SET,
ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
return 0;
}
static int msm_phy_power_off(struct phy *phy)
{
struct msm_phy_priv *priv = dev_get_priv(phy->dev);
/* Disable VBUS mimicing in the controller. */
ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_CLEAR,
ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
return 0;
}
static int msm_phy_reset(struct phy *phy)
{
struct msm_phy_priv *p = dev_get_priv(phy->dev);
/* select ULPI phy */
writel(PORT_PTS_ULPI, &p->ehci->portsc);
/* Enable sess_vld */
setbits_le32(&p->ehci->genconfig2, GEN2_SESS_VLD_CTRL_EN);
/* Enable external vbus configuration in the LINK */
setbits_le32(&p->ehci->usbcmd, SESS_VLD_CTRL);
/* USB_OTG_HS_AHB_BURST */
writel(0x0, &p->ehci->sbuscfg);
/* USB_OTG_HS_AHB_MODE: HPROT_MODE */
/* Bus access related config. */
writel(0x08, &p->ehci->sbusmode);
return 0;
}
static int msm_phy_probe(struct udevice *dev)
{
struct msm_phy_priv *priv = dev_get_priv(dev);
priv->regs = dev_remap_addr(dev);
if (!priv->regs)
return -EINVAL;
priv->ehci = (struct usb_ehci *)priv->regs;
priv->ulpi_vp.port_num = 0;
/* Warning: this will not work if viewport address is > 64 bit due to
* ULPI design.
*/
priv->ulpi_vp.viewport_addr = (phys_addr_t)&priv->ehci->ulpi_viewpoint;
return 0;
}
static struct phy_ops msm_phy_ops = {
.power_on = msm_phy_power_on,
.power_off = msm_phy_power_off,
.reset = msm_phy_reset,
};
static const struct udevice_id msm_phy_ids[] = {
{ .compatible = "qcom,apq8016-usbphy" },
{ }
};
U_BOOT_DRIVER(msm8916_usbphy) = {
.name = "msm8916_usbphy",
.id = UCLASS_PHY,
.of_match = msm_phy_ids,
.ops = &msm_phy_ops,
.probe = msm_phy_probe,
.priv_auto_alloc_size = sizeof(struct msm_phy_priv),
};