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>lime2-spi
parent
2df573e6a5
commit
92454e47bc
@ -0,0 +1,109 @@ |
|||||||
|
// 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), |
||||||
|
}; |
Loading…
Reference in new issue