phy: db410c: Add MSM USB PHY driver

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>
This commit is contained in:
Ramon Fried 2018-09-21 13:35:47 +03:00 committed by Tom Rini
parent 2df573e6a5
commit 92454e47bc
4 changed files with 119 additions and 0 deletions

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@ -210,6 +210,7 @@ S: Maintained
F: arch/arm/mach-snapdragon/
F: drivers/gpio/msm_gpio.c
F: drivers/mmc/msm_sdhci.c
F: drivers/phy/msm8916-usbh-phy.c
F: drivers/serial/serial_msm.c
F: drivers/smem/msm_smem.c
F: drivers/usb/host/ehci-msm.c

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@ -139,4 +139,12 @@ config MESON_GXL_USB_PHY
This is the generic phy driver for the Amlogic Meson GXL
USB2 and USB3 PHYS.
config MSM8916_USB_PHY
bool "Qualcomm MSM8916 USB PHY support"
depends on PHY
help
Support the USB PHY in msm8916
This PHY is found on qualcomm dragonboard410c development board.
endmenu

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@ -15,3 +15,4 @@ obj-$(CONFIG_STI_USB_PHY) += sti_usb_phy.o
obj-$(CONFIG_PHY_RCAR_GEN2) += phy-rcar-gen2.o
obj-$(CONFIG_PHY_STM32_USBPHYC) += phy-stm32-usbphyc.o
obj-$(CONFIG_MESON_GXL_USB_PHY) += meson-gxl-usb2.o meson-gxl-usb3.o
obj-$(CONFIG_MSM8916_USB_PHY) += msm8916-usbh-phy.o

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@ -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),
};