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phy: meson-g12a-usb3-pcie: add support for PCIe ops 

Add the PCIe part of the G12A USB3 PCIe Combo PHY driver.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Neil Armstrong 2021-02-25 17:53:23 +01:00
parent 3034a1eda3
commit 320160cd97
1 changed files with 77 additions and 4 deletions
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81
drivers/phy/meson-g12a-usb3-pcie.c
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@ -23,6 +23,9 @@
#include <linux/compat.h>
#include <linux/bitfield.h>
#define PHY_TYPE_PCIE 2
#define PHY_TYPE_USB3 4
#define PHY_R0 0x00
#define PHY_R0_PCIE_POWER_STATE GENMASK(4, 0)
#define PHY_R0_PCIE_USB3_SWITCH GENMASK(6, 5)
@ -55,6 +58,8 @@
#define PHY_R5_PHY_CR_ACK BIT(16)
#define PHY_R5_PHY_BS_OUT BIT(17)
#define PCIE_RESET_DELAY 500
struct phy_g12a_usb3_pcie_priv {
struct regmap *regmap;
#if CONFIG_IS_ENABLED(CLK)
@ -202,8 +207,6 @@ static int phy_meson_g12a_usb3_init(struct phy *phy)
unsigned int data;
int ret;
/* TOFIX Handle PCIE mode */
ret = reset_assert_bulk(&priv->resets);
udelay(1);
ret |= reset_deassert_bulk(&priv->resets);
@ -296,9 +299,79 @@ static int phy_meson_g12a_usb3_exit(struct phy *phy)
return reset_assert_bulk(&priv->resets);
}
static int phy_meson_g12a_usb3_pcie_init(struct phy *phy)
{
if (phy->id == PHY_TYPE_USB3)
return phy_meson_g12a_usb3_init(phy);
return 0;
}
static int phy_meson_g12a_usb3_pcie_exit(struct phy *phy)
{
if (phy->id == PHY_TYPE_USB3)
return phy_meson_g12a_usb3_exit(phy);
return 0;
}
static int phy_meson_g12a_usb3_pcie_power_on(struct phy *phy)
{
struct phy_g12a_usb3_pcie_priv *priv = dev_get_priv(phy->dev);
if (phy->id == PHY_TYPE_USB3)
return 0;
regmap_update_bits(priv->regmap, PHY_R0,
PHY_R0_PCIE_POWER_STATE,
FIELD_PREP(PHY_R0_PCIE_POWER_STATE, 0x1c));
return 0;
}
static int phy_meson_g12a_usb3_pcie_power_off(struct phy *phy)
{
struct phy_g12a_usb3_pcie_priv *priv = dev_get_priv(phy->dev);
if (phy->id == PHY_TYPE_USB3)
return 0;
regmap_update_bits(priv->regmap, PHY_R0,
PHY_R0_PCIE_POWER_STATE,
FIELD_PREP(PHY_R0_PCIE_POWER_STATE, 0x1d));
return 0;
}
static int phy_meson_g12a_usb3_pcie_reset(struct phy *phy)
{
struct phy_g12a_usb3_pcie_priv *priv = dev_get_priv(phy->dev);
int ret;
if (phy->id == PHY_TYPE_USB3)
return 0;
ret = reset_assert_bulk(&priv->resets);
if (ret)
return ret;
udelay(PCIE_RESET_DELAY);
ret = reset_deassert_bulk(&priv->resets);
if (ret)
return ret;
udelay(PCIE_RESET_DELAY);
return 0;
}
struct phy_ops meson_g12a_usb3_pcie_phy_ops = {
.init = phy_meson_g12a_usb3_init,
.exit = phy_meson_g12a_usb3_exit,
.init = phy_meson_g12a_usb3_pcie_init,
.exit = phy_meson_g12a_usb3_pcie_exit,
.power_on = phy_meson_g12a_usb3_pcie_power_on,
.power_off = phy_meson_g12a_usb3_pcie_power_off,
.reset = phy_meson_g12a_usb3_pcie_reset,
};
int meson_g12a_usb3_pcie_phy_probe(struct udevice *dev)