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