[PATCH 09/28] phy: add phy-hi6220-usb

Kishon Vijay Abraham I
2015-12-22T10:45:46Z

From: Zhangfei Gao <zhangfei.gao@linaro.org>

Support hi6220 use phy for HiKey board

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
.../devicetree/bindings/phy/phy-hi6220-usb.txt | 16 ++
drivers/phy/Kconfig | 9 ++
drivers/phy/Makefile | 1 +
drivers/phy/phy-hi6220-usb.c | 168 ++++++++++++++++++++
4 files changed, 194 insertions(+)
create mode 100644 Documentation/devicetree/bindings/phy/phy-hi6220-usb.txt
create mode 100644 drivers/phy/phy-hi6220-usb.c

diff --git a/Documentation/devicetree/bindings/phy/phy-hi6220-usb.txt b/Documentation/devicetree/bindings/phy/phy-hi6220-usb.txt
new file mode 100644
index 0000000..f17a56e
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/phy-hi6220-usb.txt
@@ -0,0 +1,16 @@
+Hisilicon hi6220 usb PHY
+-----------------------
+
+Required properties:
+- compatible: should be "hisilicon,hi6220-usb-phy"
+- #phy-cells: must be 0
+- hisilicon,peripheral-syscon: phandle of syscon used to control phy.
+Refer to phy/phy-bindings.txt for the generic PHY binding properties
+
+Example:
+ usb_phy: usbphy {
+ compatible = "hisilicon,hi6220-usb-phy";
+ #phy-cells = <0>;
+ phy-supply = <&fixed_5v_hub>;
+ hisilicon,peripheral-syscon = <&sys_ctrl>;
+ };
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index f90b766..90eec60 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -222,6 +222,15 @@ config PHY_MT65XX_USB3
for mt65xx SoCs. it supports two usb2.0 ports and
one usb3.0 port.

+config PHY_HI6220_USB
+ tristate "hi6220 USB PHY support"
+ select GENERIC_PHY
+ select MFD_SYSCON
+ help
+ Enable this to support the HISILICON HI6220 USB PHY.
+
+ To compile this driver as a module, choose M here.
+
config PHY_SUN4I_USB
tristate "Allwinner sunxi SoC USB PHY driver"
depends on ARCH_SUNXI && HAS_IOMEM && OF
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 91d7a62..c80f09d 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_TI_PIPE3) += phy-ti-pipe3.o
obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
obj-$(CONFIG_PHY_EXYNOS5250_SATA) += phy-exynos5250-sata.o
obj-$(CONFIG_PHY_HIX5HD2_SATA) += phy-hix5hd2-sata.o
+obj-$(CONFIG_PHY_HI6220_USB) += phy-hi6220-usb.o
obj-$(CONFIG_PHY_MT65XX_USB3) += phy-mt65xx-usb3.o
obj-$(CONFIG_PHY_SUN4I_USB) += phy-sun4i-usb.o
obj-$(CONFIG_PHY_SUN9I_USB) += phy-sun9i-usb.o
diff --git a/drivers/phy/phy-hi6220-usb.c b/drivers/phy/phy-hi6220-usb.c
new file mode 100644
index 0000000..b2141cb
--- /dev/null
+++ b/drivers/phy/phy-hi6220-usb.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2015 Linaro Ltd.
+ * Copyright (c) 2015 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+
+#define SC_PERIPH_CTRL4 0x00c
+
+#define CTRL4_PICO_SIDDQ BIT(6)
+#define CTRL4_PICO_OGDISABLE BIT(8)
+#define CTRL4_PICO_VBUSVLDEXT BIT(10)
+#define CTRL4_PICO_VBUSVLDEXTSEL BIT(11)
+#define CTRL4_OTG_PHY_SEL BIT(21)
+
+#define SC_PERIPH_CTRL5 0x010
+
+#define CTRL5_USBOTG_RES_SEL BIT(3)
+#define CTRL5_PICOPHY_ACAENB BIT(4)
+#define CTRL5_PICOPHY_BC_MODE BIT(5)
+#define CTRL5_PICOPHY_CHRGSEL BIT(6)
+#define CTRL5_PICOPHY_VDATSRCEND BIT(7)
+#define CTRL5_PICOPHY_VDATDETENB BIT(8)
+#define CTRL5_PICOPHY_DCDENB BIT(9)
+#define CTRL5_PICOPHY_IDDIG BIT(10)
+
+#define SC_PERIPH_CTRL8 0x018
+#define SC_PERIPH_RSTEN0 0x300
+#define SC_PERIPH_RSTDIS0 0x304
+
+#define RST0_USBOTG_BUS BIT(4)
+#define RST0_POR_PICOPHY BIT(5)
+#define RST0_USBOTG BIT(6)
+#define RST0_USBOTG_32K BIT(7)
+
+#define EYE_PATTERN_PARA 0x7053348c
+
+struct hi6220_priv {
+ struct regmap *reg;
+ struct device *dev;
+};
+
+static void hi6220_phy_init(struct hi6220_priv *priv)
+{
+ struct regmap *reg = priv->reg;
+ u32 val, mask;
+
+ val = RST0_USBOTG_BUS | RST0_POR_PICOPHY |
+ RST0_USBOTG | RST0_USBOTG_32K;
+ mask = val;
+ regmap_update_bits(reg, SC_PERIPH_RSTEN0, mask, val);
+ regmap_update_bits(reg, SC_PERIPH_RSTDIS0, mask, val);
+}
+
+static int hi6220_phy_setup(struct hi6220_priv *priv, bool on)
+{
+ struct regmap *reg = priv->reg;
+ u32 val, mask;
+ int ret;
+
+ if (on) {
+ val = CTRL5_USBOTG_RES_SEL | CTRL5_PICOPHY_ACAENB;
+ mask = val | CTRL5_PICOPHY_BC_MODE;
+ ret = regmap_update_bits(reg, SC_PERIPH_CTRL5, mask, val);
+ if (ret)
+ goto out;
+
+ val = CTRL4_PICO_VBUSVLDEXT | CTRL4_PICO_VBUSVLDEXTSEL |
+ CTRL4_OTG_PHY_SEL;
+ mask = val | CTRL4_PICO_SIDDQ | CTRL4_PICO_OGDISABLE;
+ ret = regmap_update_bits(reg, SC_PERIPH_CTRL4, mask, val);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(reg, SC_PERIPH_CTRL8, EYE_PATTERN_PARA);
+ if (ret)
+ goto out;
+ } else {
+ val = CTRL4_PICO_SIDDQ;
+ mask = val;
+ ret = regmap_update_bits(reg, SC_PERIPH_CTRL4, mask, val);
+ if (ret)
+ goto out;
+ }
+
+ return 0;
+out:
+ dev_err(priv->dev, "failed to setup phy ret: %d\n", ret);
+ return ret;
+}
+
+static int hi6220_phy_start(struct phy *phy)
+{
+ struct hi6220_priv *priv = phy_get_drvdata(phy);
+
+ return hi6220_phy_setup(priv, true);
+}
+
+static int hi6220_phy_exit(struct phy *phy)
+{
+ struct hi6220_priv *priv = phy_get_drvdata(phy);
+
+ return hi6220_phy_setup(priv, false);
+}
+
+static struct phy_ops hi6220_phy_ops = {
+ .init = hi6220_phy_start,
+ .exit = hi6220_phy_exit,
+ .owner = THIS_MODULE,
+};
+
+static int hi6220_phy_probe(struct platform_device *pdev)
+{
+ struct phy_provider *phy_provider;
+ struct device *dev = &pdev->dev;
+ struct phy *phy;
+ struct hi6220_priv *priv;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ priv->reg = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "hisilicon,peripheral-syscon");
+ if (IS_ERR(priv->reg)) {
+ dev_err(dev, "no hisilicon,peripheral-syscon\n");
+ return PTR_ERR(priv->reg);
+ }
+
+ hi6220_phy_init(priv);
+
+ phy = devm_phy_create(dev, NULL, &hi6220_phy_ops);
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ phy_set_drvdata(phy, priv);
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct of_device_id hi6220_phy_of_match[] = {
+ {.compatible = "hisilicon,hi6220-usb-phy",},
+ { },
+};
+MODULE_DEVICE_TABLE(of, hi6220_phy_of_match);
+
+static struct platform_driver hi6220_phy_driver = {
+ .probe = hi6220_phy_probe,
+ .driver = {
+ .name = "hi6220-usb-phy",
+ .of_match_table = hi6220_phy_of_match,
+ }
+};
+module_platform_driver(hi6220_phy_driver);
+
+MODULE_DESCRIPTION("HISILICON HI6220 USB PHY driver");
+MODULE_ALIAS("platform:hi6220-usb-phy");
+MODULE_LICENSE("GPL");
--
1.7.9.5