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phy: meson-gxl-usb: add set_mode call to force switch to peripheral mode

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Add set_mode function in the Amlogic GXL PHYs that will be called by
the arch code to switch PHYs from/to gadget mode.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Neil Armstrong 2020-03-30 11:27:24 +02:00
parent c2b9aa98bf
commit 838c0af9d2
3 changed files with 70 additions and 16 deletions
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16
arch/arm/include/asm/arch-meson/usb-gx.h Normal file
View file

@ -0,0 +1,16 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2019 BayLibre SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
*/
#ifndef _ARCH_MESON_USB_GX_H_
#define _ARCH_MESON_USB_GX_H_
#include <generic-phy.h>
#include <linux/usb/otg.h>
/* TOFIX add set_mode to struct phy_ops */
void phy_meson_gxl_usb2_set_mode(struct phy *phy, enum usb_dr_mode mode);
void phy_meson_gxl_usb3_set_mode(struct phy *phy, enum usb_dr_mode mode);
#endif

30
drivers/phy/meson-gxl-usb2.c
View file

@ -17,6 +17,9 @@
#include <regmap.h>
#include <power/regulator.h>
#include <clk.h>
#include <linux/usb/otg.h>
#include <asm/arch/usb-gx.h>
#include <linux/bitops.h>
#include <linux/compat.h>
@ -121,15 +124,30 @@ static void phy_meson_gxl_usb2_reset(struct phy_meson_gxl_usb2_priv *priv)
udelay(RESET_COMPLETE_TIME);
}
static void
phy_meson_gxl_usb2_set_host_mode(struct phy_meson_gxl_usb2_priv *priv)
void phy_meson_gxl_usb2_set_mode(struct phy *phy, enum usb_dr_mode mode)
{
struct udevice *dev = phy->dev;
struct phy_meson_gxl_usb2_priv *priv = dev_get_priv(dev);
uint val;
regmap_read(priv->regmap, U2P_R0, &val);
val |= U2P_R0_DM_PULLDOWN;
val |= U2P_R0_DP_PULLDOWN;
val &= ~U2P_R0_ID_PULLUP;
switch (mode) {
case USB_DR_MODE_UNKNOWN:
case USB_DR_MODE_HOST:
case USB_DR_MODE_OTG:
val |= U2P_R0_DM_PULLDOWN;
val |= U2P_R0_DP_PULLDOWN;
val &= ~U2P_R0_ID_PULLUP;
break;
case USB_DR_MODE_PERIPHERAL:
val &= ~U2P_R0_DM_PULLDOWN;
val &= ~U2P_R0_DP_PULLDOWN;
val |= U2P_R0_ID_PULLUP;
break;
}
regmap_write(priv->regmap, U2P_R0, val);
phy_meson_gxl_usb2_reset(priv);
@ -146,7 +164,7 @@ static int phy_meson_gxl_usb2_power_on(struct phy *phy)
val &= ~U2P_R0_POWER_ON_RESET;
regmap_write(priv->regmap, U2P_R0, val);
phy_meson_gxl_usb2_set_host_mode(priv);
phy_meson_gxl_usb2_set_mode(phy, USB_DR_MODE_HOST);
#if CONFIG_IS_ENABLED(DM_REGULATOR)
if (priv->phy_supply) {

40
drivers/phy/meson-gxl-usb3.c
View file

@ -16,6 +16,9 @@
#include <generic-phy.h>
#include <regmap.h>
#include <clk.h>
#include <linux/usb/otg.h>
#include <asm/arch/usb-gx.h>
#include <linux/bitops.h>
#include <linux/compat.h>
@ -93,20 +96,35 @@ struct phy_meson_gxl_usb3_priv {
#endif
};
static int
phy_meson_gxl_usb3_set_host_mode(struct phy_meson_gxl_usb3_priv *priv)
void phy_meson_gxl_usb3_set_mode(struct phy *phy, enum usb_dr_mode mode)
{
struct udevice *dev = phy->dev;
struct phy_meson_gxl_usb3_priv *priv = dev_get_priv(dev);
uint val;
regmap_read(priv->regmap, USB_R0, &val);
val &= ~USB_R0_U2D_ACT;
regmap_write(priv->regmap, USB_R0, val);
switch (mode) {
case USB_DR_MODE_UNKNOWN:
case USB_DR_MODE_HOST:
case USB_DR_MODE_OTG:
regmap_read(priv->regmap, USB_R0, &val);
val &= ~USB_R0_U2D_ACT;
regmap_write(priv->regmap, USB_R0, val);
regmap_read(priv->regmap, USB_R4, &val);
val &= ~USB_R4_P21_SLEEP_M0;
regmap_write(priv->regmap, USB_R4, val);
regmap_read(priv->regmap, USB_R4, &val);
val &= ~USB_R4_P21_SLEEP_M0;
regmap_write(priv->regmap, USB_R4, val);
break;
return 0;
case USB_DR_MODE_PERIPHERAL:
regmap_read(priv->regmap, USB_R0, &val);
val |= USB_R0_U2D_ACT;
regmap_write(priv->regmap, USB_R0, val);
regmap_read(priv->regmap, USB_R4, &val);
val |= USB_R4_P21_SLEEP_M0;
regmap_write(priv->regmap, USB_R4, val);
break;
}
}
static int phy_meson_gxl_usb3_power_on(struct phy *phy)
@ -122,7 +140,9 @@ static int phy_meson_gxl_usb3_power_on(struct phy *phy)
val |= FIELD_PREP(USB_R5_ID_DIG_TH_MASK, 0xff);
regmap_write(priv->regmap, USB_R5, val);
return phy_meson_gxl_usb3_set_host_mode(priv);
phy_meson_gxl_usb3_set_mode(phy, USB_DR_MODE_HOST);
return 0;
}
static int phy_meson_gxl_usb3_power_off(struct phy *phy)