^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * extcon-qcom-spmi-misc.c - Qualcomm USB extcon driver to support USB ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * detection based on extcon-usb-gpio.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2016 Linaro, Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Stephen Boyd <stephen.boyd@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/extcon-provider.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define USB_ID_DEBOUNCE_MS 5 /* ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct qcom_usb_extcon_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct extcon_dev *edev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct delayed_work wq_detcable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) unsigned long debounce_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static const unsigned int qcom_usb_extcon_cable[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) EXTCON_USB_HOST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) EXTCON_NONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static void qcom_usb_extcon_detect_cable(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) bool id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct qcom_usb_extcon_info *info = container_of(to_delayed_work(work),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct qcom_usb_extcon_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) wq_detcable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* check ID and update cable state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) ret = irq_get_irqchip_state(info->irq, IRQCHIP_STATE_LINE_LEVEL, &id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) extcon_set_state_sync(info->edev, EXTCON_USB_HOST, !id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static irqreturn_t qcom_usb_irq_handler(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct qcom_usb_extcon_info *info = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) info->debounce_jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int qcom_usb_extcon_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct qcom_usb_extcon_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) info->edev = devm_extcon_dev_allocate(dev, qcom_usb_extcon_cable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (IS_ERR(info->edev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) dev_err(dev, "failed to allocate extcon device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) ret = devm_extcon_dev_register(dev, info->edev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) dev_err(dev, "failed to register extcon device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) info->debounce_jiffies = msecs_to_jiffies(USB_ID_DEBOUNCE_MS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) INIT_DELAYED_WORK(&info->wq_detcable, qcom_usb_extcon_detect_cable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) info->irq = platform_get_irq_byname(pdev, "usb_id");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (info->irq < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return info->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ret = devm_request_threaded_irq(dev, info->irq, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) qcom_usb_irq_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) IRQF_TRIGGER_RISING |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) pdev->name, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) dev_err(dev, "failed to request handler for ID IRQ\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) platform_set_drvdata(pdev, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) device_init_wakeup(dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* Perform initial detection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) qcom_usb_extcon_detect_cable(&info->wq_detcable.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static int qcom_usb_extcon_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct qcom_usb_extcon_info *info = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) cancel_delayed_work_sync(&info->wq_detcable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static int qcom_usb_extcon_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct qcom_usb_extcon_info *info = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) ret = enable_irq_wake(info->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int qcom_usb_extcon_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct qcom_usb_extcon_info *info = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) ret = disable_irq_wake(info->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static SIMPLE_DEV_PM_OPS(qcom_usb_extcon_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) qcom_usb_extcon_suspend, qcom_usb_extcon_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static const struct of_device_id qcom_usb_extcon_dt_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) { .compatible = "qcom,pm8941-misc", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) MODULE_DEVICE_TABLE(of, qcom_usb_extcon_dt_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static struct platform_driver qcom_usb_extcon_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) .probe = qcom_usb_extcon_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .remove = qcom_usb_extcon_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) .name = "extcon-pm8941-misc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) .pm = &qcom_usb_extcon_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) .of_match_table = qcom_usb_extcon_dt_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) module_platform_driver(qcom_usb_extcon_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) MODULE_DESCRIPTION("QCOM USB ID extcon driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) MODULE_AUTHOR("Stephen Boyd <stephen.boyd@linaro.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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