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phy: phy-mtk-tphy: add support for phy type switch

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Add support for PHY type switch via the mediatek topmisc syscon.

This is needed on mt7981 to make the PCIe correctly work and display
LinkUp.

Follow the same implementation done on Linux kernel with the usage of
the mediatek,syscon-type property.

Example:

u3port0: usb-phy@11e10700 {
	reg = <0x11e10700 0x900>;
	clocks = <&topckgen CK_TOP_USB3_PHY_SEL>;
	clock-names = "ref";
	#phy-cells = <1>;
	mediatek,syscon-type = <&topmisc 0x218 0>;
	status = "okay";
};

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
This commit is contained in:
Christian Marangi 2024-06-24 23:03:27 +02:00 • committed by Tom Rini
parent d3c610fa46
commit d4a489c1b2
2 changed files with 82 additions and 0 deletions
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2
drivers/phy/Kconfig
View file

@ -263,6 +263,8 @@ config PHY_MTK_TPHY
bool "MediaTek T-PHY Driver"
depends on PHY
depends on ARCH_MEDIATEK || SOC_MT7621
select REGMAP
select SYSCON
help
MediaTek T-PHY driver supports usb2.0, usb3.0 ports, PCIe and
SATA, and meanwhile supports two version T-PHY which have

80
drivers/phy/phy-mtk-tphy.c
View file

@ -10,6 +10,8 @@
#include <generic-phy.h>
#include <malloc.h>
#include <mapmem.h>
#include <regmap.h>
#include <syscon.h>
#include <asm/io.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
@ -215,6 +217,14 @@
#define ANA_EQ_EYE_CTRL_SIGNAL5 0xdc
#define RG_CDR_BIRLTD0_GEN3_MSK GENMASK(4, 0)
/* PHY switch between pcie/usb3/sgmii/sata */
#define USB_PHY_SWITCH_CTRL 0x0
#define RG_PHY_SW_TYPE GENMASK(3, 0)
#define RG_PHY_SW_PCIE 0x0
#define RG_PHY_SW_USB3 0x1
#define RG_PHY_SW_SGMII 0x2
#define RG_PHY_SW_SATA 0x3
enum mtk_phy_version {
MTK_TPHY_V1 = 1,
MTK_TPHY_V2,
@ -257,6 +267,10 @@ struct mtk_phy_instance {
u32 index;
u32 type;
struct regmap *type_sw;
u32 type_sw_reg;
u32 type_sw_index;
u32 eye_vrt;
u32 eye_term;
u32 discth;
@ -616,6 +630,67 @@ static void u2_phy_props_set(struct mtk_tphy *tphy,
FIELD_PREP(PA6_RG_U2_PRE_EMP, instance->pre_emphasis));
}
/* type switch for usb3/pcie/sgmii/sata */
static int phy_type_syscon_get(struct udevice *dev, struct mtk_phy_instance *instance,
ofnode dn)
{
struct ofnode_phandle_args args;
int err;
if (!ofnode_read_bool(dn, "mediatek,syscon-type"))
return 0;
err = ofnode_parse_phandle_with_args(dn, "mediatek,syscon-type",
NULL, 2, 0, &args);
if (err)
return err;
instance->type_sw_reg = args.args[0];
instance->type_sw_index = args.args[1] & 0x3; /* <=3 */
instance->type_sw = syscon_node_to_regmap(args.node);
if (IS_ERR(instance->type_sw))
return PTR_ERR(instance->type_sw);
debug("phy-%s.%d: type_sw - reg %#x, index %d\n",
dev->name, instance->index, instance->type_sw_reg,
instance->type_sw_index);
return 0;
}
static int phy_type_set(struct mtk_phy_instance *instance)
{
int type;
u32 offset;
if (!instance->type_sw)
return 0;
switch (instance->type) {
case PHY_TYPE_USB3:
type = RG_PHY_SW_USB3;
break;
case PHY_TYPE_PCIE:
type = RG_PHY_SW_PCIE;
break;
case PHY_TYPE_SGMII:
type = RG_PHY_SW_SGMII;
break;
case PHY_TYPE_SATA:
type = RG_PHY_SW_SATA;
break;
case PHY_TYPE_USB2:
default:
return 0;
}
offset = instance->type_sw_index * BITS_PER_BYTE;
regmap_update_bits(instance->type_sw, instance->type_sw_reg,
RG_PHY_SW_TYPE << offset, type << offset);
return 0;
}
static int mtk_phy_init(struct phy *phy)
{
struct mtk_tphy *tphy = dev_get_priv(phy->dev);
@ -746,6 +821,7 @@ static int mtk_phy_xlate(struct phy *phy,
}
phy_parse_property(tphy, instance);
phy_type_set(instance);
return 0;
}
@ -807,6 +883,10 @@ static int mtk_tphy_probe(struct udevice *dev)
&instance->da_ref_clk);
if (err)
return err;
err = phy_type_syscon_get(dev, instance, subnode);
if (err)
return err;
}
return 0;