[PATCH v2 2/2] phy: add combo phy driver for HiSilicon STB SoCs
Shawn Guo
shawnguo at kernel.org
Mon Oct 23 04:26:08 PDT 2017
From: Jianguo Sun <sunjianguo1 at huawei.com>
Add combo phy driver for HiSilicon STB SoCs. This phy can be
used as pcie-phy, sata-phy or usb-phy.
Signed-off-by: Jianguo Sun <sunjianguo1 at huawei.com>
Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
---
drivers/phy/hisilicon/Kconfig | 9 ++
drivers/phy/hisilicon/Makefile | 1 +
drivers/phy/hisilicon/phy-histb-combphy.c | 253 ++++++++++++++++++++++++++++++
3 files changed, 263 insertions(+)
create mode 100644 drivers/phy/hisilicon/phy-histb-combphy.c
diff --git a/drivers/phy/hisilicon/Kconfig b/drivers/phy/hisilicon/Kconfig
index 6164c4cd0f65..d9afe2b12827 100644
--- a/drivers/phy/hisilicon/Kconfig
+++ b/drivers/phy/hisilicon/Kconfig
@@ -11,6 +11,15 @@ config PHY_HI6220_USB
To compile this driver as a module, choose M here.
+config PHY_HISTB_COMBPHY
+ tristate "HiSilicon STB SoCs COMBPHY support"
+ depends on (ARCH_HISI && ARM64) || COMPILE_TEST
+ select GENERIC_PHY
+ select MFD_SYSCON
+ help
+ Enable this to support the HISILICON STB SoCs COMBPHY.
+ If unsure, say N.
+
config PHY_HIX5HD2_SATA
tristate "HIX5HD2 SATA PHY Driver"
depends on ARCH_HIX5HD2 && OF && HAS_IOMEM
diff --git a/drivers/phy/hisilicon/Makefile b/drivers/phy/hisilicon/Makefile
index 541b348187a8..5e8e2dfa8c37 100644
--- a/drivers/phy/hisilicon/Makefile
+++ b/drivers/phy/hisilicon/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_PHY_HI6220_USB) += phy-hi6220-usb.o
+obj-$(CONFIG_PHY_HISTB_COMBPHY) += phy-histb-combphy.o
obj-$(CONFIG_PHY_HIX5HD2_SATA) += phy-hix5hd2-sata.o
diff --git a/drivers/phy/hisilicon/phy-histb-combphy.c b/drivers/phy/hisilicon/phy-histb-combphy.c
new file mode 100644
index 000000000000..59685c98b0de
--- /dev/null
+++ b/drivers/phy/hisilicon/phy-histb-combphy.c
@@ -0,0 +1,253 @@
+/*
+ * COMBPHY driver for HiSilicon STB SoCs
+ *
+ * Copyright (C) 2016-2017 HiSilicon Co., Ltd. http://www.hisilicon.com
+ *
+ * Authors: Jianguo Sun <sunjianguo1 at huawei.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <dt-bindings/phy/phy.h>
+
+#define PERI_CTRL 0x0008
+#define PERI_COMBPHY1_CFG 0x0858
+
+#define COMBPHY1_MODE_MASK GENMASK(12, 11)
+#define COMBPHY_MODE_SHIFT 11
+#define COMBPHY_MODE_PCIE 0
+#define COMBPHY_MODE_USB 1
+#define COMBPHY_MODE_SATA 2
+
+#define COMBPHY1_BYPASS_CODEC_MASK BIT(31)
+#define COMBPHY1_BYPASS_CODEC_VAL (1 << 31)
+
+#define COMBPHY1_CLKREF_OUT_OEN_MASK BIT(0)
+#define COMBPHY1_CLKREF_OUT_OEN_VAL (1 << 0)
+
+#define NANO_TEST_WRITE GENMASK(24, 24)
+#define NANO_TEST_DATA GENMASK(23, 20)
+#define NANO_TEST_ADDR GENMASK(16, 12)
+
+struct histb_combphy_priv {
+ u32 mode;
+ struct regmap *peri;
+ struct clk *ref;
+ struct phy *phy;
+ struct reset_control *por;
+};
+
+static void nano_register_write(struct regmap *peri, u32 addr,
+ u32 offset, u32 value)
+{
+ u32 val;
+ int ret;
+
+ ret = regmap_read(peri, addr, &val);
+ val &= ~NANO_TEST_ADDR;
+ val &= ~NANO_TEST_DATA;
+ val |= (offset << 12);
+ val |= (value << 20);
+ ret |= regmap_write(peri, addr, val);
+
+ ret = regmap_read(peri, addr, &val);
+ val &= ~NANO_TEST_WRITE;
+ ret |= regmap_write(peri, addr, val);
+
+ ret = regmap_read(peri, addr, &val);
+ val |= NANO_TEST_WRITE;
+ ret |= regmap_write(peri, addr, val);
+}
+
+static int histb_pcie_phy_init(struct histb_combphy_priv *priv)
+{
+ struct regmap *peri = priv->peri;
+ int ret;
+
+ /* set to pcie mode */
+ regmap_update_bits(peri, PERI_CTRL, COMBPHY1_MODE_MASK,
+ COMBPHY_MODE_PCIE << COMBPHY_MODE_SHIFT);
+
+ regmap_update_bits(peri, PERI_COMBPHY1_CFG,
+ COMBPHY1_BYPASS_CODEC_MASK,
+ ~COMBPHY1_BYPASS_CODEC_VAL);
+
+ ret = clk_prepare_enable(priv->ref);
+ if (ret) {
+ dev_err(&priv->phy->dev, "clk_prepare_enable fail!\n");
+ return ret;
+ }
+
+ reset_control_deassert(priv->por);
+
+ regmap_update_bits(peri, PERI_COMBPHY1_CFG,
+ COMBPHY1_CLKREF_OUT_OEN_MASK,
+ COMBPHY1_CLKREF_OUT_OEN_VAL);
+
+ /* need to wait for EP clk stable */
+ mdelay(5);
+
+ nano_register_write(peri, PERI_COMBPHY1_CFG, 0x1, 0x8);
+ nano_register_write(peri, PERI_COMBPHY1_CFG, 0xc, 0x9);
+ nano_register_write(peri, PERI_COMBPHY1_CFG, 0x1a, 0x4);
+
+ return 0;
+}
+
+static int histb_pcie_phy_exit(struct histb_combphy_priv *priv)
+{
+ regmap_update_bits(priv->peri, PERI_COMBPHY1_CFG,
+ COMBPHY1_CLKREF_OUT_OEN_MASK,
+ ~COMBPHY1_CLKREF_OUT_OEN_VAL);
+ reset_control_deassert(priv->por);
+ clk_disable_unprepare(priv->ref);
+
+ return 0;
+}
+
+static int histb_usb_phy_init(struct histb_combphy_priv *priv)
+{
+ int ret;
+
+ ret = clk_prepare_enable(priv->ref);
+ if (ret) {
+ dev_err(&priv->phy->dev, "clk_prepare_enable fail!\n");
+ return ret;
+ }
+ reset_control_deassert(priv->por);
+ mdelay(1);
+
+ return 0;
+}
+
+static int histb_usb_phy_exit(struct histb_combphy_priv *priv)
+{
+ reset_control_deassert(priv->por);
+ clk_disable_unprepare(priv->ref);
+
+ return 0;
+}
+
+static int histb_combphy_init(struct phy *phy)
+{
+ struct histb_combphy_priv *priv = phy_get_drvdata(phy);
+ int ret = -1;
+
+ if (priv->mode == PHY_TYPE_PCIE)
+ ret = histb_pcie_phy_init(priv);
+ else if (priv->mode == PHY_TYPE_USB3)
+ ret = histb_usb_phy_init(priv);
+
+ return ret;
+}
+
+static int histb_combphy_exit(struct phy *phy)
+{
+ struct histb_combphy_priv *priv = phy_get_drvdata(phy);
+ int ret = 0;
+
+ if (priv->mode == PHY_TYPE_PCIE)
+ ret = histb_pcie_phy_exit(priv);
+ else if (priv->mode == PHY_TYPE_USB3)
+ ret = histb_usb_phy_exit(priv);
+
+ return ret;
+}
+
+static const struct phy_ops histb_combphy_ops = {
+ .init = histb_combphy_init,
+ .exit = histb_combphy_exit,
+ .owner = THIS_MODULE,
+};
+
+static struct phy *histb_combphy_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ struct histb_combphy_priv *priv = dev_get_drvdata(dev);
+
+ if (args->args_count < 1) {
+ dev_err(dev, "DT did not pass correct no of args\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ priv->mode = args->args[0];
+
+ if (priv->mode > PHY_TYPE_USB3) {
+ dev_err(dev, "DT did not pass correct phy mode\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ return priv->phy;
+}
+
+static int histb_combphy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct histb_combphy_priv *priv;
+ struct phy_provider *phy_provider;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->peri = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "hisilicon,peripheral-syscon");
+ if (IS_ERR(priv->peri)) {
+ dev_err(dev, "failed to find peri_ctrl regmap\n");
+ return PTR_ERR(priv->peri);
+ }
+
+ priv->ref = devm_clk_get(dev, NULL);
+ if (IS_ERR(priv->ref)) {
+ dev_err(dev, "failed to find ref clk\n");
+ return PTR_ERR(priv->ref);
+ }
+
+ priv->por = devm_reset_control_get(dev, NULL);
+ if (IS_ERR(priv->por)) {
+ dev_err(dev, "failed to por reset\n");
+ return PTR_ERR(priv->por);
+ }
+
+ priv->phy = devm_phy_create(dev, NULL, &histb_combphy_ops);
+ if (IS_ERR(priv->phy)) {
+ dev_err(dev, "failed to create combphy\n");
+ return PTR_ERR(priv->phy);
+ }
+
+ dev_set_drvdata(dev, priv);
+ phy_set_drvdata(priv->phy, priv);
+
+ phy_provider = devm_of_phy_provider_register(dev, histb_combphy_xlate);
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct of_device_id histb_combphy_of_match[] = {
+ { .compatible = "hisilicon,hi3798cv200-combphy" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, histb_combphy_of_match);
+
+static struct platform_driver histb_combphy_driver = {
+ .probe = histb_combphy_probe,
+ .driver = {
+ .name = "combphy",
+ .of_match_table = histb_combphy_of_match,
+ },
+};
+module_platform_driver(histb_combphy_driver);
+
+MODULE_DESCRIPTION("HiSilicon STB COMBPHY driver");
+MODULE_LICENSE("GPL v2");
--
1.9.1
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