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: arch/arm/mach-snapdragon/
F: drivers/gpio/msm_gpio.c F: drivers/gpio/msm_gpio.c
F: drivers/mmc/msm_sdhci.c F: drivers/mmc/msm_sdhci.c
F: drivers/phy/msm8916-usbh-phy.c
F: drivers/serial/serial_msm.c F: drivers/serial/serial_msm.c
F: drivers/smem/msm_smem.c F: drivers/smem/msm_smem.c
F: drivers/usb/host/ehci-msm.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 This is the generic phy driver for the Amlogic Meson GXL
USB2 and USB3 PHYS. 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 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-$(CONFIG_PHY_RCAR_GEN2) += phy-rcar-gen2.o
obj-$(CONFIG_PHY_STM32_USBPHYC) += phy-stm32-usbphyc.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-$(CONFIG_MESON_GXL_USB_PHY) += meson-gxl-usb2.o meson-gxl-usb3.o
obj-$(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),
};