[PATCH 4/4] usb: phy: add phy-hi6220
Zhangfei Gao
zhangfei.gao at linaro.org
Thu Feb 5 06:47:00 PST 2015
Add usb phy controller for hi6220 platform
Signed-off-by: Zhangfei Gao <zhangfei.gao at linaro.org>
---
drivers/usb/phy/Kconfig | 9 ++
drivers/usb/phy/Makefile | 1 +
drivers/usb/phy/phy-hi6220.c | 290 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 300 insertions(+)
create mode 100644 drivers/usb/phy/phy-hi6220.c
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index c6d0c8e..405a3d0 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -173,6 +173,15 @@ config USB_MXS_PHY
MXS Phy is used by some of the i.MX SoCs, for example imx23/28/6x.
+config USB_HI6220_PHY
+ tristate "hi6220 USB PHY support"
+ select USB_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 USB_RCAR_PHY
tristate "Renesas R-Car USB PHY support"
depends on USB || USB_GADGET
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index 75f2bba..819283c 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_SAMSUNG_USBPHY) += phy-samsung-usb.o
obj-$(CONFIG_TWL6030_USB) += phy-twl6030-usb.o
obj-$(CONFIG_USB_EHCI_TEGRA) += phy-tegra-usb.o
obj-$(CONFIG_USB_GPIO_VBUS) += phy-gpio-vbus-usb.o
+obj-$(CONFIG_USB_HI6220_PHY) += phy-hi6220.o
obj-$(CONFIG_USB_ISP1301) += phy-isp1301.o
obj-$(CONFIG_USB_MSM_OTG) += phy-msm-usb.o
obj-$(CONFIG_USB_MV_OTG) += phy-mv-usb.o
diff --git a/drivers/usb/phy/phy-hi6220.c b/drivers/usb/phy/phy-hi6220.c
new file mode 100644
index 0000000..87b1f0e
--- /dev/null
+++ b/drivers/usb/phy/phy-hi6220.c
@@ -0,0 +1,290 @@
+/*
+ * 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/clk.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+
+#define SC_PERIPH_CTRL4 0x00c
+
+#define PERIPH_CTRL4_PICO_SIDDQ BIT(6)
+#define PERIPH_CTRL4_PICO_OGDISABLE BIT(8)
+#define PERIPH_CTRL4_PICO_VBUSVLDEXT BIT(10)
+#define PERIPH_CTRL4_PICO_VBUSVLDEXTSEL BIT(11)
+#define PERIPH_CTRL4_OTG_PHY_SEL BIT(21)
+
+#define SC_PERIPH_CTRL5 0x010
+
+#define PERIPH_CTRL5_USBOTG_RES_SEL BIT(3)
+#define PERIPH_CTRL5_PICOPHY_ACAENB BIT(4)
+#define PERIPH_CTRL5_PICOPHY_BC_MODE BIT(5)
+#define PERIPH_CTRL5_PICOPHY_CHRGSEL BIT(6)
+#define PERIPH_CTRL5_PICOPHY_VDATSRCEND BIT(7)
+#define PERIPH_CTRL5_PICOPHY_VDATDETENB BIT(8)
+#define PERIPH_CTRL5_PICOPHY_DCDENB BIT(9)
+#define PERIPH_CTRL5_PICOPHY_IDDIG BIT(10)
+
+#define SC_PERIPH_CTRL8 0x018
+
+#define EYE_PATTERN_PARA 0x7053348c
+
+#define SC_PERIPH_RSTDIS0 0x304
+
+#define PERIPH_RSTDIS0_USBOTG_BUS BIT(4)
+#define PERIPH_RSTDIS0_POR_PICOPHY BIT(5)
+#define PERIPH_RSTDIS0_USBOTG BIT(6)
+#define PERIPH_RSTDIS0_USBOTG_32K BIT(7)
+
+enum usb_mode {
+ USB_EMPTY,
+ GADGET_DEVICE,
+ OTG_HOST,
+};
+
+struct hi6220_priv {
+ struct usb_phy phy;
+ struct delayed_work work;
+ struct regmap *reg;
+ struct clk *clk;
+ struct regulator *vcc;
+ int gpio_vbus_det;
+ int gpio_id_det;
+ enum usb_mode mode;
+};
+
+static void hi6220_start_periphrals(struct hi6220_priv *priv, bool on)
+{
+ struct usb_otg *otg = priv->phy.otg;
+
+ if (!otg->gadget)
+ return;
+
+ if (on)
+ usb_gadget_connect(otg->gadget);
+ else
+ usb_gadget_disconnect(otg->gadget);
+}
+
+static void hi6220_detect_work(struct work_struct *work)
+{
+ struct hi6220_priv *priv =
+ container_of(work, struct hi6220_priv, work.work);
+ int id_det, vbus_det;
+ enum usb_mode mode;
+
+ if (!gpio_is_valid(priv->gpio_id_det) ||
+ !gpio_is_valid(priv->gpio_vbus_det))
+ return;
+
+ id_det = gpio_get_value_cansleep(priv->gpio_id_det);
+ vbus_det = gpio_get_value_cansleep(priv->gpio_vbus_det);
+
+ if (vbus_det == 0) {
+ if (id_det == 1)
+ mode = GADGET_DEVICE;
+ else
+ mode = OTG_HOST;
+ } else {
+ mode = USB_EMPTY;
+ }
+
+ if (mode == GADGET_DEVICE && priv->mode == USB_EMPTY)
+ hi6220_start_periphrals(priv, true);
+ if (mode == USB_EMPTY && priv->mode == GADGET_DEVICE)
+ hi6220_start_periphrals(priv, false);
+
+ priv->mode = mode;
+}
+
+static irqreturn_t hiusb_gpio_intr(int irq, void *data)
+{
+ struct hi6220_priv *priv = (struct hi6220_priv *)data;
+
+ /* add debounce time */
+ schedule_delayed_work(&priv->work, msecs_to_jiffies(100));
+ return IRQ_HANDLED;
+}
+
+static int mv_otg_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ struct hi6220_priv *priv;
+
+ priv = container_of(otg->usb_phy, struct hi6220_priv, phy);
+ otg->gadget = gadget;
+ return 0;
+}
+
+static void hi6220_phy_setup(struct hi6220_priv *priv)
+{
+ u32 val, mask;
+ int ret;
+
+ if (priv->reg == NULL)
+ return;
+
+ val = PERIPH_RSTDIS0_USBOTG_BUS | PERIPH_RSTDIS0_POR_PICOPHY |
+ PERIPH_RSTDIS0_USBOTG | PERIPH_RSTDIS0_USBOTG_32K;
+ mask = val;
+ ret = regmap_update_bits(priv->reg, SC_PERIPH_RSTDIS0, mask, val);
+ if (ret)
+ return;
+
+ ret = regmap_read(priv->reg, SC_PERIPH_CTRL5, &val);
+ val = PERIPH_CTRL5_USBOTG_RES_SEL | PERIPH_CTRL5_PICOPHY_ACAENB;
+ mask = val | PERIPH_CTRL5_PICOPHY_BC_MODE;
+ ret = regmap_update_bits(priv->reg, SC_PERIPH_CTRL5, mask, val);
+ if (ret)
+ return;
+
+ val = PERIPH_CTRL4_PICO_VBUSVLDEXT | PERIPH_CTRL4_PICO_VBUSVLDEXTSEL |
+ PERIPH_CTRL4_OTG_PHY_SEL;
+ mask = val | PERIPH_CTRL4_PICO_SIDDQ | PERIPH_CTRL4_PICO_OGDISABLE;
+ ret = regmap_update_bits(priv->reg, SC_PERIPH_CTRL4, mask, val);
+ if (ret)
+ return;
+
+ ret = regmap_write(priv->reg, SC_PERIPH_CTRL8, EYE_PATTERN_PARA);
+ if (ret)
+ return;
+}
+
+static int hi6220_phy_probe(struct platform_device *pdev)
+{
+ struct hi6220_priv *priv;
+ struct usb_otg *otg;
+ struct device_node *np = pdev->dev.of_node;
+ int ret, irq;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
+ if (!otg)
+ return -ENOMEM;
+
+ priv->phy.dev = &pdev->dev;
+ priv->phy.otg = otg;
+ priv->phy.label = "hi6220";
+ platform_set_drvdata(pdev, priv);
+ otg->set_peripheral = mv_otg_set_peripheral;
+
+ priv->gpio_vbus_det = of_get_named_gpio(np, "hisilicon,gpio_vbus_det", 0);
+ if (priv->gpio_vbus_det == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (!gpio_is_valid(priv->gpio_vbus_det)) {
+ dev_err(&pdev->dev, "invalid gpio %d\n", priv->gpio_vbus_det);
+ return -ENODEV;
+ }
+
+ priv->gpio_id_det = of_get_named_gpio(np, "hisilicon,gpio_id_det", 0);
+ if (priv->gpio_id_det == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (!gpio_is_valid(priv->gpio_id_det)) {
+ dev_err(&pdev->dev, "invalid gpio %d\n", priv->gpio_id_det);
+ return -ENODEV;
+ }
+
+ priv->reg = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "hisilicon,peripheral-syscon");
+ if (IS_ERR(priv->reg))
+ priv->reg = NULL;
+
+ INIT_DELAYED_WORK(&priv->work, hi6220_detect_work);
+
+ ret = devm_gpio_request_one(&pdev->dev, priv->gpio_vbus_det,
+ GPIOF_IN, "gpio_vbus_det");
+ if (ret < 0) {
+ dev_err(&pdev->dev, "gpio request failed for gpio_vbus_det\n");
+ return ret;
+ }
+
+ ret = devm_gpio_request_one(&pdev->dev, priv->gpio_id_det,
+ GPIOF_IN, "gpio_id_det");
+ if (ret < 0) {
+ dev_err(&pdev->dev, "gpio request failed for gpio_id_det\n");
+ return ret;
+ }
+
+ priv->vcc = devm_regulator_get(&pdev->dev, "vcc");
+ if (!IS_ERR(priv->vcc)) {
+ ret = regulator_enable(priv->vcc);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to enable regulator\n");
+ return -ENODEV;
+ }
+ }
+
+ priv->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(priv->clk)) {
+ regulator_disable(priv->vcc);
+ return PTR_ERR(priv->clk);
+ }
+ clk_prepare_enable(priv->clk);
+
+ irq = gpio_to_irq(priv->gpio_vbus_det);
+ ret = devm_request_irq(&pdev->dev, gpio_to_irq(priv->gpio_vbus_det),
+ hiusb_gpio_intr, IRQF_NO_SUSPEND |
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+ "vbus_gpio_intr", priv);
+ if (ret) {
+ dev_err(&pdev->dev, "request gpio irq failed.\n");
+ goto err_irq;
+ }
+
+ hi6220_phy_setup(priv);
+ ret = usb_add_phy(&priv->phy, USB_PHY_TYPE_USB2);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't register transceiver\n");
+ goto err_irq;
+ }
+ schedule_delayed_work(&priv->work, 0);
+
+ return 0;
+err_irq:
+ clk_disable_unprepare(priv->clk);
+ regulator_disable(priv->vcc);
+ return ret;
+}
+
+static int hi6220_phy_remove(struct platform_device *pdev)
+{
+ struct hi6220_priv *priv = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(priv->clk);
+ regulator_disable(priv->vcc);
+ return 0;
+}
+
+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,
+ .remove = hi6220_phy_remove,
+ .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");
--
1.9.1
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