--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/usb/role.h>
+#include <linux/usb/typec_mux.h>
+
+#define TYPEC_MISC_STATUS 0xb
+#define CC_ATTACHED BIT(0)
+#define CC_ORIENTATION BIT(1)
+#define SNK_SRC_MODE BIT(6)
+#define TYPEC_MODE_CFG 0x44
+#define TYPEC_DISABLE_CMD BIT(0)
+#define EN_SNK_ONLY BIT(1)
+#define EN_SRC_ONLY BIT(2)
+#define TYPEC_VCONN_CONTROL 0x46
+#define VCONN_EN_SRC BIT(0)
+#define VCONN_EN_VAL BIT(1)
+#define TYPEC_EXIT_STATE_CFG 0x50
+#define SEL_SRC_UPPER_REF BIT(2)
+#define TYPEC_INTR_EN_CFG_1 0x5e
+#define TYPEC_INTR_EN_CFG_1_MASK GENMASK(7, 0)
+
+struct qcom_pmic_typec {
+ struct device *dev;
+ struct regmap *regmap;
+ u32 base;
+
+ struct typec_port *port;
+ struct usb_role_switch *role_sw;
+
+ struct regulator *vbus_reg;
+ bool vbus_enabled;
+};
+
+static void qcom_pmic_typec_enable_vbus_regulator(struct qcom_pmic_typec
+ *qcom_usb, bool enable)
+{
+ int ret;
+
+ if (enable == qcom_usb->vbus_enabled)
+ return;
+
+ if (enable) {
+ ret = regulator_enable(qcom_usb->vbus_reg);
+ if (ret)
+ return;
+ } else {
+ ret = regulator_disable(qcom_usb->vbus_reg);
+ if (ret)
+ return;
+ }
+ qcom_usb->vbus_enabled = enable;
+}
+
+static void qcom_pmic_typec_check_connection(struct qcom_pmic_typec *qcom_usb)
+{
+ enum typec_orientation orientation;
+ enum usb_role role;
+ unsigned int stat;
+ bool enable_vbus;
+
+ regmap_read(qcom_usb->regmap, qcom_usb->base + TYPEC_MISC_STATUS,
+ &stat);
+
+ if (stat & CC_ATTACHED) {
+ orientation = (stat & CC_ORIENTATION) ?
+ TYPEC_ORIENTATION_REVERSE :
+ TYPEC_ORIENTATION_NORMAL;
+ typec_set_orientation(qcom_usb->port, orientation);
+
+ role = (stat & SNK_SRC_MODE) ? USB_ROLE_HOST : USB_ROLE_DEVICE;
+ if (role == USB_ROLE_HOST)
+ enable_vbus = true;
+ else
+ enable_vbus = false;
+ } else {
+ role = USB_ROLE_NONE;
+ enable_vbus = false;
+ }
+
+ qcom_pmic_typec_enable_vbus_regulator(qcom_usb, enable_vbus);
+ usb_role_switch_set_role(qcom_usb->role_sw, role);
+}
+
+static irqreturn_t qcom_pmic_typec_interrupt(int irq, void *_qcom_usb)
+{
+ struct qcom_pmic_typec *qcom_usb = _qcom_usb;
+
+ qcom_pmic_typec_check_connection(qcom_usb);
+ return IRQ_HANDLED;
+}
+
+static void qcom_pmic_typec_typec_hw_init(struct qcom_pmic_typec *qcom_usb,
+ enum typec_port_type type)
+{
+ u8 mode = 0;
+
+ regmap_update_bits(qcom_usb->regmap,
+ qcom_usb->base + TYPEC_INTR_EN_CFG_1,
+ TYPEC_INTR_EN_CFG_1_MASK, 0);
+
+ if (type == TYPEC_PORT_SRC)
+ mode = EN_SRC_ONLY;
+ else if (type == TYPEC_PORT_SNK)
+ mode = EN_SNK_ONLY;
+
+ regmap_update_bits(qcom_usb->regmap, qcom_usb->base + TYPEC_MODE_CFG,
+ EN_SNK_ONLY | EN_SRC_ONLY, mode);
+
+ regmap_update_bits(qcom_usb->regmap,
+ qcom_usb->base + TYPEC_VCONN_CONTROL,
+ VCONN_EN_SRC | VCONN_EN_VAL, VCONN_EN_SRC);
+ regmap_update_bits(qcom_usb->regmap,
+ qcom_usb->base + TYPEC_EXIT_STATE_CFG,
+ SEL_SRC_UPPER_REF, SEL_SRC_UPPER_REF);
+}
+
+static int qcom_pmic_typec_probe(struct platform_device *pdev)
+{
+ struct qcom_pmic_typec *qcom_usb;
+ struct device *dev = &pdev->dev;
+ struct fwnode_handle *fwnode;
+ struct typec_capability cap;
+ const char *buf;
+ int ret, irq, role;
+ u32 reg;
+
+ ret = device_property_read_u32(dev, "reg", ®);
+ if (ret < 0) {
+ dev_err(dev, "missing base address\n");
+ return ret;
+ }
+
+ qcom_usb = devm_kzalloc(dev, sizeof(*qcom_usb), GFP_KERNEL);
+ if (!qcom_usb)
+ return -ENOMEM;
+
+ qcom_usb->dev = dev;
+ qcom_usb->base = reg;
+
+ qcom_usb->regmap = dev_get_regmap(dev->parent, NULL);
+ if (!qcom_usb->regmap) {
+ dev_err(dev, "Failed to get regmap\n");
+ return -EINVAL;
+ }
+
+ qcom_usb->vbus_reg = devm_regulator_get(qcom_usb->dev, "usb_vbus");
+ if (IS_ERR(qcom_usb->vbus_reg))
+ return PTR_ERR(qcom_usb->vbus_reg);
+
+ fwnode = device_get_named_child_node(dev, "connector");
+ if (!fwnode)
+ return -EINVAL;
+
+ ret = fwnode_property_read_string(fwnode, "power-role", &buf);
+ if (!ret) {
+ role = typec_find_port_power_role(buf);
+ if (role < 0)
+ role = TYPEC_PORT_SNK;
+ } else {
+ role = TYPEC_PORT_SNK;
+ }
+ cap.type = role;
+
+ ret = fwnode_property_read_string(fwnode, "data-role", &buf);
+ if (!ret) {
+ role = typec_find_port_data_role(buf);
+ if (role < 0)
+ role = TYPEC_PORT_UFP;
+ } else {
+ role = TYPEC_PORT_UFP;
+ }
+ cap.data = role;
+
+ cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
+ cap.fwnode = fwnode;
+ qcom_usb->port = typec_register_port(dev, &cap);
+ if (IS_ERR(qcom_usb->port)) {
+ ret = PTR_ERR(qcom_usb->port);
+ dev_err(dev, "Failed to register type c port %d\n", ret);
+ goto err_put_node;
+ }
+ fwnode_handle_put(fwnode);
+
+ qcom_usb->role_sw = fwnode_usb_role_switch_get(dev_fwnode(qcom_usb->dev));
+ if (IS_ERR(qcom_usb->role_sw)) {
+ if (PTR_ERR(qcom_usb->role_sw) != -EPROBE_DEFER)
+ dev_err(dev, "failed to get role switch\n");
+ ret = PTR_ERR(qcom_usb->role_sw);
+ goto err_typec_port;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ goto err_usb_role_sw;
+
+ ret = devm_request_threaded_irq(qcom_usb->dev, irq, NULL,
+ qcom_pmic_typec_interrupt, IRQF_ONESHOT,
+ "qcom-pmic-typec", qcom_usb);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not request IRQ\n");
+ goto err_usb_role_sw;
+ }
+
+ platform_set_drvdata(pdev, qcom_usb);
+ qcom_pmic_typec_typec_hw_init(qcom_usb, cap.type);
+ qcom_pmic_typec_check_connection(qcom_usb);
+
+ return 0;
+
+err_usb_role_sw:
+ usb_role_switch_put(qcom_usb->role_sw);
+err_typec_port:
+ typec_unregister_port(qcom_usb->port);
+err_put_node:
+ fwnode_handle_put(fwnode);
+
+ return ret;
+}
+
+static int qcom_pmic_typec_remove(struct platform_device *pdev)
+{
+ struct qcom_pmic_typec *qcom_usb = platform_get_drvdata(pdev);
+
+ usb_role_switch_set_role(qcom_usb->role_sw, USB_ROLE_NONE);
+ qcom_pmic_typec_enable_vbus_regulator(qcom_usb, 0);
+
+ typec_unregister_port(qcom_usb->port);
+ usb_role_switch_put(qcom_usb->role_sw);
+
+ return 0;
+}
+
+static const struct of_device_id qcom_pmic_typec_table[] = {
+ { .compatible = "qcom,pm8150b-usb-typec" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, qcom_pmic_typec_table);
+
+static struct platform_driver qcom_pmic_typec = {
+ .driver = {
+ .name = "qcom,pmic-typec",
+ .of_match_table = qcom_pmic_typec_table,
+ },
+ .probe = qcom_pmic_typec_probe,
+ .remove = qcom_pmic_typec_remove,
+};
+module_platform_driver(qcom_pmic_typec);
+
+MODULE_DESCRIPTION("QCOM PMIC USB type C driver");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-starfive.git / commitdiff