[PATCH 3/5] phy: add inno-usb2-phy driver for hi3798cv200 SoC
Jiancheng Xue
xuejiancheng at hisilicon.com
Wed Jun 21 02:00:43 PDT 2017
From: Pengcheng Li <lpc.li at hisilicon.com>
Add inno-usb2-phy driver for hi3798cv200 SoC.
Signed-off-by: Pengcheng Li <lpc.li at hisilicon.com>
Signed-off-by: Jiancheng Xue <xuejiancheng at hisilicon.com>
---
drivers/phy/Kconfig | 10 ++
drivers/phy/Makefile | 1 +
drivers/phy/phy-hisi-inno-usb2.c | 287 +++++++++++++++++++++++++++++++++++++++
3 files changed, 298 insertions(+)
create mode 100644 drivers/phy/phy-hisi-inno-usb2.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index afaf7b6..f86b9b7 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -225,6 +225,16 @@ config PHY_EXYNOS5250_SATA
SATA 3.0 Gb/s, SATA 6.0 Gb/s speeds. It supports one SATA host
port to accept one SATA device.
+config PHY_HISI_INNO_USB2
+ tristate "HiSilicon INNO USB2 PHY support"
+ depends on (ARCH_HISI) || COMPILE_TEST
+ select GENERIC_PHY
+ select MFD_SYSCON
+ help
+ Support for INNO USB2 PHY on HiSilicon SoCs. This Phy supports
+ USB 1.5Mb/s, USB 12Mb/s, USB 480Mb/s speeds. It supports one
+ USB host port to accept one USB device.
+
config PHY_HIX5HD2_SATA
tristate "HIX5HD2 SATA PHY Driver"
depends on ARCH_HIX5HD2 && OF && HAS_IOMEM
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index f8047b4..a275547 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -27,6 +27,7 @@ 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-$(CONFIG_PHY_HISI_INNO_USB2) += phy-hisi-inno-usb2.o
obj-$(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-hisi-inno-usb2.c b/drivers/phy/phy-hisi-inno-usb2.c
new file mode 100644
index 0000000..582c500
--- /dev/null
+++ b/drivers/phy/phy-hisi-inno-usb2.c
@@ -0,0 +1,287 @@
+/*
+ * HiSilicon INNO USB2 PHY Driver.
+ *
+ * Copyright (c) 2016-2017 HiSilicon Technologies Co., Ltd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+#define MAX_PORTS 4
+#define REF_CLK_STABLE_TIME 100 /*unit:us*/
+#define UTMI_CLK_STABLE_TIME 200 /*unit:us*/
+#define UTMI_RST_COMPLETE_TIME 200 /*unit:us*/
+#define PORT_RST_COMPLETE_TIME 2 /*unit:ms*/
+#define TEST_RST_COMPLETE_TIME 100 /*unit:us*/
+#define POR_RST_COMPLETE_TIME 300 /*unit:us*/
+
+
+struct hisi_inno_phy_port {
+ struct clk *utmi_clk;
+ struct reset_control *port_rst;
+ struct reset_control *utmi_rst;
+};
+
+struct hisi_inno_phy_priv {
+ struct regmap *reg_peri;
+ struct clk *ref_clk;
+ struct reset_control *test_rst;
+ struct reset_control *por_rst;
+ const struct reg_sequence *reg_seq;
+ u32 reg_num;
+ struct hisi_inno_phy_port *ports;
+ u8 port_num;
+};
+
+#define HI3798CV200_PERI_USB0 0x120
+static const struct reg_sequence hi3798cv200_reg_seq[] = {
+ { HI3798CV200_PERI_USB0, 0x00a00604, },
+ { HI3798CV200_PERI_USB0, 0x00e00604, },
+ { HI3798CV200_PERI_USB0, 0x00a00604, 1000 },
+};
+
+static int hisi_inno_phy_setup(struct hisi_inno_phy_priv *priv)
+{
+ return regmap_multi_reg_write_bypassed(priv->reg_peri,
+ priv->reg_seq, priv->reg_num);
+}
+
+static int hisi_inno_port_init(struct hisi_inno_phy_port *port)
+{
+ int ret;
+
+ reset_control_deassert(port->port_rst);
+ msleep(PORT_RST_COMPLETE_TIME);
+
+ ret = clk_prepare_enable(port->utmi_clk);
+ if (ret)
+ return ret;
+ udelay(UTMI_CLK_STABLE_TIME);
+
+ reset_control_deassert(port->utmi_rst);
+ udelay(UTMI_RST_COMPLETE_TIME);
+
+ return 0;
+}
+
+static int hisi_inno_phy_init(struct phy *phy)
+{
+ struct hisi_inno_phy_priv *priv = phy_get_drvdata(phy);
+ int ret, port;
+
+ ret = clk_prepare_enable(priv->ref_clk);
+ if (ret)
+ return ret;
+ udelay(REF_CLK_STABLE_TIME);
+
+ if (priv->test_rst) {
+ reset_control_deassert(priv->test_rst);
+ udelay(TEST_RST_COMPLETE_TIME);
+ }
+
+ reset_control_deassert(priv->por_rst);
+ udelay(POR_RST_COMPLETE_TIME);
+
+ /* config phy clk and phy eye diagram */
+ ret = hisi_inno_phy_setup(priv);
+ if (ret)
+ goto err_disable_ref_clk;
+
+ for (port = 0; port < priv->port_num; port++) {
+ ret = hisi_inno_port_init(&priv->ports[port]);
+ if (ret)
+ goto err_disable_clks;
+ }
+
+ return 0;
+
+err_disable_clks:
+ while (--port >= 0)
+ clk_disable_unprepare(priv->ports[port].utmi_clk);
+err_disable_ref_clk:
+ clk_disable_unprepare(priv->ref_clk);
+
+ return ret;
+}
+
+static void hisi_inno_phy_disable(struct phy *phy)
+{
+ struct hisi_inno_phy_priv *priv = phy_get_drvdata(phy);
+ int i;
+
+ for (i = 0; i < priv->port_num; i++)
+ clk_disable_unprepare(priv->ports[i].utmi_clk);
+
+ clk_disable_unprepare(priv->ref_clk);
+}
+
+static int hisi_inno_phy_of_get_ports(struct device *dev,
+ struct hisi_inno_phy_priv *priv)
+{
+ struct device_node *node = dev->of_node;
+ struct device_node *child;
+ int port = 0;
+ int ret;
+
+ priv->port_num = of_get_child_count(node);
+ if (priv->port_num > MAX_PORTS) {
+ dev_err(dev, "too many ports : %d (max = %d)\n",
+ priv->port_num, MAX_PORTS);
+ return -EINVAL;
+ }
+
+ priv->ports = devm_kcalloc(dev, priv->port_num,
+ sizeof(struct hisi_inno_phy_port), GFP_KERNEL);
+ if (!priv->ports)
+ return -ENOMEM;
+
+ for_each_child_of_node(node, child) {
+ struct hisi_inno_phy_port *phy_port = &priv->ports[port];
+
+ phy_port->utmi_clk = devm_get_clk_from_child(dev, child, NULL);
+ if (IS_ERR(phy_port->utmi_clk)) {
+ ret = PTR_ERR(phy_port->utmi_clk);
+ goto fail;
+ }
+
+ phy_port->port_rst = of_reset_control_get_exclusive(child, "port_rst");
+ if (IS_ERR(phy_port->port_rst)) {
+ ret = PTR_ERR(phy_port->port_rst);
+ goto fail;
+ }
+
+ phy_port->utmi_rst = of_reset_control_get_exclusive(child, "utmi_rst");
+ if (IS_ERR(phy_port->utmi_rst)) {
+ ret = PTR_ERR(phy_port->utmi_rst);
+ reset_control_put(phy_port->port_rst);
+ goto fail;
+ }
+ port++;
+ }
+
+ return 0;
+
+fail:
+ while (--port >= 0) {
+ struct hisi_inno_phy_port *phy_port = &priv->ports[port];
+
+ reset_control_put(phy_port->utmi_rst);
+ reset_control_put(phy_port->port_rst);
+ clk_put(phy_port->utmi_clk);
+ }
+ of_node_put(child);
+
+ return ret;
+}
+
+static int hisi_inno_phy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct phy *phy;
+ struct hisi_inno_phy_priv *priv;
+ struct device_node *node = dev->of_node;
+ int ret = 0;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ if (of_device_is_compatible(node, "hisilicon,hi3798cv200-usb2-phy")) {
+ priv->reg_seq = hi3798cv200_reg_seq;
+ priv->reg_num = sizeof(hi3798cv200_reg_seq)
+ / sizeof(struct reg_sequence);
+ }
+
+ priv->reg_peri = syscon_regmap_lookup_by_phandle(node,
+ "hisilicon,peripheral-syscon");
+ if (IS_ERR(priv->reg_peri)) {
+ dev_err(dev, "no hisilicon,peripheral-syscon\n");
+ return PTR_ERR(priv->reg_peri);
+ }
+
+ priv->ref_clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(priv->ref_clk))
+ return PTR_ERR(priv->ref_clk);
+
+ priv->por_rst = devm_reset_control_get_exclusive(dev, "por_rst");
+ if (IS_ERR(priv->por_rst))
+ return PTR_ERR(priv->por_rst);
+
+ priv->test_rst = devm_reset_control_get_optional_exclusive(dev, "test_rst");
+ if (IS_ERR(priv->test_rst))
+ return PTR_ERR(priv->test_rst);
+
+ ret = hisi_inno_phy_of_get_ports(dev, priv);
+ if (ret)
+ return ret;
+
+ phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
+ if (!phy)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, phy);
+ phy_set_drvdata(phy, priv);
+
+ return hisi_inno_phy_init(phy);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int hisi_inno_phy_suspend(struct device *dev)
+{
+ struct phy *phy = dev_get_drvdata(dev);
+
+ hisi_inno_phy_disable(phy);
+
+ return 0;
+}
+
+static int hisi_inno_phy_resume(struct device *dev)
+{
+ struct phy *phy = dev_get_drvdata(dev);
+
+ return hisi_inno_phy_init(phy);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops hisi_inno_phy_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(hisi_inno_phy_suspend, hisi_inno_phy_resume)
+};
+
+static const struct of_device_id hisi_inno_phy_of_match[] = {
+ {.compatible = "hisilicon,inno-usb2-phy",},
+ {.compatible = "hisilicon,hi3798cv200-usb2-phy",},
+ { },
+};
+MODULE_DEVICE_TABLE(of, hisi_inno_phy_of_match);
+
+static struct platform_driver hisi_inno_phy_driver = {
+ .probe = hisi_inno_phy_probe,
+ .driver = {
+ .name = "hisi-inno-phy",
+ .of_match_table = hisi_inno_phy_of_match,
+ .pm = &hisi_inno_phy_pm_ops,
+ }
+};
+module_platform_driver(hisi_inno_phy_driver);
+
+MODULE_DESCRIPTION("HiSilicon INNO USB2 PHY Driver");
+MODULE_LICENSE("GPL v2");
--
1.9.1
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