^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) * Maxim Integrated MAX3355 USB OTG chip extcon driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2014-2015 Cogent Embedded, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/extcon-provider.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/gpio/consumer.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/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct max3355_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct extcon_dev *edev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct gpio_desc *id_gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct gpio_desc *shdn_gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static const unsigned int max3355_cable[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) EXTCON_USB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) EXTCON_USB_HOST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) EXTCON_NONE,
^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 irqreturn_t max3355_id_irq(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct max3355_data *data = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int id = gpiod_get_value_cansleep(data->id_gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) if (id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * ID = 1 means USB HOST cable detached.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * As we don't have event for USB peripheral cable attached,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * we simulate USB peripheral attach here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) extcon_set_state_sync(data->edev, EXTCON_USB_HOST, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) extcon_set_state_sync(data->edev, EXTCON_USB, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * ID = 0 means USB HOST cable attached.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * As we don't have event for USB peripheral cable detached,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * we simulate USB peripheral detach here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) extcon_set_state_sync(data->edev, EXTCON_USB, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) extcon_set_state_sync(data->edev, EXTCON_USB_HOST, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int max3355_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct max3355_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct gpio_desc *gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int irq, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) data = devm_kzalloc(&pdev->dev, sizeof(struct max3355_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) gpiod = devm_gpiod_get(&pdev->dev, "id", GPIOD_IN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (IS_ERR(gpiod)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) dev_err(&pdev->dev, "failed to get ID_OUT GPIO\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return PTR_ERR(gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) data->id_gpiod = gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) gpiod = devm_gpiod_get(&pdev->dev, "maxim,shdn", GPIOD_OUT_HIGH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (IS_ERR(gpiod)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) dev_err(&pdev->dev, "failed to get SHDN# GPIO\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return PTR_ERR(gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) data->shdn_gpiod = gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) data->edev = devm_extcon_dev_allocate(&pdev->dev, max3355_cable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (IS_ERR(data->edev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) dev_err(&pdev->dev, "failed to allocate extcon device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return PTR_ERR(data->edev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) err = devm_extcon_dev_register(&pdev->dev, data->edev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) dev_err(&pdev->dev, "failed to register extcon device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) irq = gpiod_to_irq(data->id_gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (irq < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) dev_err(&pdev->dev, "failed to translate ID_OUT GPIO to IRQ\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) err = devm_request_threaded_irq(&pdev->dev, irq, NULL, max3355_id_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) IRQF_ONESHOT | IRQF_NO_SUSPEND |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) IRQF_TRIGGER_RISING |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) IRQF_TRIGGER_FALLING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) pdev->name, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) dev_err(&pdev->dev, "failed to request ID_OUT IRQ\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return err;
^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) platform_set_drvdata(pdev, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* Perform initial detection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) max3355_id_irq(irq, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int max3355_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct max3355_data *data = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) gpiod_set_value_cansleep(data->shdn_gpiod, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static const struct of_device_id max3355_match_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) { .compatible = "maxim,max3355", },
^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) MODULE_DEVICE_TABLE(of, max3355_match_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static struct platform_driver max3355_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .probe = max3355_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .remove = max3355_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .name = "extcon-max3355",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .of_match_table = max3355_match_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) module_platform_driver(max3355_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) MODULE_AUTHOR("Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) MODULE_DESCRIPTION("Maxim MAX3355 extcon driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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