[PATCH v3 3/9] phy: phy-mtk-tphy: support type switch by pericfg

Chunfeng Yun
2021-08-17T09:22:39Z

Add support type switch between USB3, PCIe, SATA and SGMII by
pericfg register, this is used to take the place of efuse or
jumper.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v2~3: no changes
---
drivers/phy/mediatek/phy-mtk-tphy.c | 84 ++++++++++++++++++++++++++++-
1 file changed, 82 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c
index 3259210f08a1..a6502058a1a5 100644
--- a/drivers/phy/mediatek/phy-mtk-tphy.c
+++ b/drivers/phy/mediatek/phy-mtk-tphy.c
@@ -10,11 +10,13 @@
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/iopoll.h>
+#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>

/* version V1 sub-banks offset base address */
/* banks shared by multiple phys */
@@ -280,6 +282,14 @@
#define RG_CDR_BIRLTD0_GEN3_MSK GENMASK(4, 0)
#define RG_CDR_BIRLTD0_GEN3_VAL(x) (0x1f & (x))

+/* 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
+
#define TPHY_CLKS_CNT 2

enum mtk_phy_version {
@@ -322,7 +332,10 @@ struct mtk_phy_instance {
};
struct clk_bulk_data clks[TPHY_CLKS_CNT];
u32 index;
- u8 type;
+ u32 type;
+ struct regmap *type_sw;
+ u32 type_sw_reg;
+ u32 type_sw_index;
int eye_src;
int eye_vrt;
int eye_term;
@@ -969,6 +982,64 @@ static void u2_phy_props_set(struct mtk_tphy *tphy,
}
}

+/* type switch for usb3/pcie/sgmii/sata */
+static int phy_type_syscon_get(struct mtk_phy_instance *instance,
+ struct device_node *dn)
+{
+ struct of_phandle_args args;
+ int ret;
+
+ /* type switch function is optional */
+ if (!of_property_read_bool(dn, "mediatek,syscon-type"))
+ return 0;
+
+ ret = of_parse_phandle_with_fixed_args(dn, "mediatek,syscon-type",
+ 2, 0, &args);
+ if (ret)
+ return ret;
+
+ instance->type_sw_reg = args.args[0];
+ instance->type_sw_index = args.args[1] & 0x3; /* <=3 */
+ instance->type_sw = syscon_node_to_regmap(args.np);
+ of_node_put(args.np);
+ dev_info(&instance->phy->dev, "type_sw - reg %#x, index %d\n",
+ instance->type_sw_reg, instance->type_sw_index);
+
+ return PTR_ERR_OR_ZERO(instance->type_sw);
+}
+
+static int phy_type_set(struct mtk_phy_instance *instance)
+{
+ int type;
+ u32 mask;
+
+ 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;
+ }
+
+ mask = RG_PHY_SW_TYPE << (instance->type_sw_index * BITS_PER_BYTE);
+ regmap_update_bits(instance->type_sw, instance->type_sw_reg, mask, type);
+
+ return 0;
+}
+
static int mtk_phy_init(struct phy *phy)
{
struct mtk_phy_instance *instance = phy_get_drvdata(phy);
@@ -993,6 +1064,9 @@ static int mtk_phy_init(struct phy *phy)
case PHY_TYPE_SATA:
sata_phy_instance_init(tphy, instance);
break;
+ case PHY_TYPE_SGMII:
+ /* nothing to do, only used to set type */
+ break;
default:
dev_err(tphy->dev, "incompatible PHY type\n");
clk_bulk_disable_unprepare(TPHY_CLKS_CNT, instance->clks);
@@ -1081,7 +1155,8 @@ static struct phy *mtk_phy_xlate(struct device *dev,
if (!(instance->type == PHY_TYPE_USB2 ||
instance->type == PHY_TYPE_USB3 ||
instance->type == PHY_TYPE_PCIE ||
- instance->type == PHY_TYPE_SATA)) {
+ instance->type == PHY_TYPE_SATA ||
+ instance->type == PHY_TYPE_SGMII)) {
dev_err(dev, "unsupported device type: %d\n", instance->type);
return ERR_PTR(-EINVAL);
}
@@ -1100,6 +1175,7 @@ static struct phy *mtk_phy_xlate(struct device *dev,
}

phy_parse_property(tphy, instance);
+ phy_type_set(instance);

return instance->phy;
}
@@ -1244,6 +1320,10 @@ static int mtk_tphy_probe(struct platform_device *pdev)
retval = devm_clk_bulk_get_optional(&phy->dev, TPHY_CLKS_CNT, clks);
if (retval)
goto put_child;
+
+ retval = phy_type_syscon_get(instance, child_np);
+ if (retval)
+ goto put_child;
}

provider = devm_of_phy_provider_register(dev, mtk_phy_xlate);