^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) /* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/of_gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/pm_qos.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <media/rc-core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define GPIO_IR_DEVICE_NAME "gpio_ir_recv"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct gpio_rc_dev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct rc_dev *rcdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct gpio_desc *gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct device *pmdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct pm_qos_request qos;
^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 gpio_ir_recv_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) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct gpio_rc_dev *gpio_dev = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct device *pmdev = gpio_dev->pmdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * For some cpuidle systems, not all:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * Respond to interrupt taking more latency when cpu in idle.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * Invoke asynchronous pm runtime get from interrupt context,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * this may introduce a millisecond delay to call resume callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * where to disable cpuilde.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * Two issues lead to fail to decode first frame, one is latency to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * respond to interrupt, another is delay introduced by async api.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (pmdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) pm_runtime_get(pmdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) val = gpiod_get_value(gpio_dev->gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (val >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) ir_raw_event_store_edge(gpio_dev->rcdev, val == 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (pmdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) pm_runtime_mark_last_busy(pmdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) pm_runtime_put_autosuspend(pmdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^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 gpio_ir_recv_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 device_node *np = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct gpio_rc_dev *gpio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct rc_dev *rcdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) u32 period = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) gpio_dev = devm_kzalloc(dev, sizeof(*gpio_dev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (!gpio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) gpio_dev->gpiod = devm_gpiod_get(dev, NULL, GPIOD_IN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (IS_ERR(gpio_dev->gpiod)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) rc = PTR_ERR(gpio_dev->gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /* Just try again if this happens */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (rc != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) dev_err(dev, "error getting gpio (%d)\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) gpio_dev->irq = gpiod_to_irq(gpio_dev->gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (gpio_dev->irq < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return gpio_dev->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) rcdev = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (!rcdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) rcdev->priv = gpio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) rcdev->device_name = GPIO_IR_DEVICE_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) rcdev->input_phys = GPIO_IR_DEVICE_NAME "/input0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) rcdev->input_id.bustype = BUS_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) rcdev->input_id.vendor = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) rcdev->input_id.product = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) rcdev->input_id.version = 0x0100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) rcdev->dev.parent = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) rcdev->driver_name = KBUILD_MODNAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) rcdev->min_timeout = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) rcdev->timeout = IR_DEFAULT_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) rcdev->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) rcdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) rcdev->map_name = of_get_property(np, "linux,rc-map-name", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (!rcdev->map_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) rcdev->map_name = RC_MAP_EMPTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) gpio_dev->rcdev = rcdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) rc = devm_rc_register_device(dev, rcdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) dev_err(dev, "failed to register rc device (%d)\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return rc;
^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) of_property_read_u32(np, "linux,autosuspend-period", &period);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (period) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) gpio_dev->pmdev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) pm_runtime_set_autosuspend_delay(dev, period);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) pm_runtime_use_autosuspend(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) pm_runtime_set_suspended(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) pm_runtime_enable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) platform_set_drvdata(pdev, gpio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return devm_request_irq(dev, gpio_dev->irq, gpio_ir_recv_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) "gpio-ir-recv-irq", gpio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static int gpio_ir_recv_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct gpio_rc_dev *gpio_dev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) enable_irq_wake(gpio_dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) disable_irq(gpio_dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static int gpio_ir_recv_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct gpio_rc_dev *gpio_dev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) disable_irq_wake(gpio_dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) enable_irq(gpio_dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static int gpio_ir_recv_runtime_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct gpio_rc_dev *gpio_dev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) cpu_latency_qos_remove_request(&gpio_dev->qos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static int gpio_ir_recv_runtime_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) struct gpio_rc_dev *gpio_dev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) cpu_latency_qos_add_request(&gpio_dev->qos, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static const struct dev_pm_ops gpio_ir_recv_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) .suspend = gpio_ir_recv_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) .resume = gpio_ir_recv_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) .runtime_suspend = gpio_ir_recv_runtime_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) .runtime_resume = gpio_ir_recv_runtime_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static const struct of_device_id gpio_ir_recv_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) { .compatible = "gpio-ir-receiver", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) MODULE_DEVICE_TABLE(of, gpio_ir_recv_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static struct platform_driver gpio_ir_recv_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) .probe = gpio_ir_recv_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .name = KBUILD_MODNAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) .of_match_table = of_match_ptr(gpio_ir_recv_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) .pm = &gpio_ir_recv_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) module_platform_driver(gpio_ir_recv_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) MODULE_DESCRIPTION("GPIO IR Receiver driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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