msm: rc: Rename TSOP IR Receiver Driver
Since the driver is a generic gpio based IR Receiver driver,
name of the driver has been changed from tsop-ir to gpio-ir-recv.
Variables of the driver change accordingly.
Change-Id: I2e41c320b3f2f1a9796fc404791024c112a498c1
Signed-off-by: Ankush Khandelwal <akhand@codeaurora.org>
diff --git a/drivers/media/rc/gpio-ir-recv.c b/drivers/media/rc/gpio-ir-recv.c
new file mode 100644
index 0000000..a9b8e40
--- /dev/null
+++ b/drivers/media/rc/gpio-ir-recv.c
@@ -0,0 +1,199 @@
+/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <media/rc-core.h>
+#include <media/gpio-ir-recv.h>
+
+#define TSOP_DRIVER_NAME "gpio-rc-recv"
+#define TSOP_DEVICE_NAME "gpio_ir_recv"
+
+struct gpio_rc_dev {
+ struct rc_dev *rcdev;
+ struct mutex lock;
+ unsigned int gpio_nr;
+ bool active_low;
+ bool can_wakeup;
+ struct work_struct work;
+};
+
+static void ir_decoder_work(struct work_struct *work)
+{
+ struct gpio_rc_dev *gpio_dev = container_of(work,
+ struct gpio_rc_dev, work);
+ unsigned int gval;
+ int rc = 0;
+ enum raw_event_type type = IR_SPACE;
+
+ mutex_lock(&gpio_dev->lock);
+ gval = gpio_get_value_cansleep(gpio_dev->gpio_nr);
+
+ if (gval < 0)
+ goto err_get_value;
+
+ if (gpio_dev->active_low)
+ gval = !gval;
+
+ if (gval == 1)
+ type = IR_PULSE;
+
+ rc = ir_raw_event_store_edge(gpio_dev->rcdev, type);
+ if (rc < 0)
+ goto err_get_value;
+
+ ir_raw_event_handle(gpio_dev->rcdev);
+
+err_get_value:
+ mutex_unlock(&gpio_dev->lock);
+}
+
+static irqreturn_t gpio_ir_recv_irq_handler(int irq, void *data)
+{
+ struct gpio_rc_dev *gpio_dev = data;
+
+ schedule_work(&gpio_dev->work);
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit gpio_ir_recv_probe(struct platform_device *pdev)
+{
+ struct gpio_rc_dev *gpio_dev;
+ struct rc_dev *rcdev;
+ const struct gpio_ir_recv_platform_data *pdata =
+ pdev->dev.platform_data;
+ int rc = 0;
+
+ if (!pdata)
+ return -EINVAL;
+
+ if (pdata->gpio_nr < 0)
+ return -EINVAL;
+
+ gpio_dev = kzalloc(sizeof(struct gpio_rc_dev), GFP_KERNEL);
+ if (!gpio_dev)
+ return -ENOMEM;
+
+ mutex_init(&gpio_dev->lock);
+
+ rcdev = rc_allocate_device();
+ if (!rcdev) {
+ rc = -ENOMEM;
+ goto err_allocate_device;
+ }
+
+ rcdev->driver_type = RC_DRIVER_IR_RAW;
+ rcdev->allowed_protos = RC_TYPE_NEC;
+ rcdev->input_name = TSOP_DEVICE_NAME;
+ rcdev->input_id.bustype = BUS_HOST;
+ rcdev->driver_name = TSOP_DRIVER_NAME;
+ rcdev->map_name = RC_MAP_SAMSUNG_NECX;
+
+ gpio_dev->rcdev = rcdev;
+ gpio_dev->gpio_nr = pdata->gpio_nr;
+ gpio_dev->active_low = pdata->active_low;
+ gpio_dev->can_wakeup = pdata->can_wakeup;
+
+ INIT_WORK(&gpio_dev->work, ir_decoder_work);
+
+ rc = gpio_request(pdata->gpio_nr, "gpio-ir-recv");
+ if (rc < 0)
+ goto err_gpio_request;
+ rc = gpio_direction_input(pdata->gpio_nr);
+ if (rc < 0)
+ goto err_gpio_direction_input;
+
+ rc = rc_register_device(rcdev);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "failed to register rc device\n");
+ goto err_register_rc_device;
+ }
+
+ platform_set_drvdata(pdev, gpio_dev);
+
+ rc = request_irq(gpio_to_irq(pdata->gpio_nr), gpio_ir_recv_irq_handler,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+ "gpio-ir-recv-irq", gpio_dev);
+ if (rc < 0)
+ goto err_request_irq;
+
+ if (pdata->can_wakeup == true) {
+ rc = enable_irq_wake(gpio_to_irq(pdata->gpio_nr));
+ if (rc < 0)
+ goto err_enable_irq_wake;
+ }
+
+ return 0;
+
+err_enable_irq_wake:
+ free_irq(gpio_to_irq(gpio_dev->gpio_nr), gpio_dev);
+err_request_irq:
+ platform_set_drvdata(pdev, NULL);
+ rc_unregister_device(rcdev);
+err_register_rc_device:
+err_gpio_direction_input:
+ gpio_free(pdata->gpio_nr);
+err_gpio_request:
+ rc_free_device(rcdev);
+ rcdev = NULL;
+err_allocate_device:
+ mutex_destroy(&gpio_dev->lock);
+ kfree(gpio_dev);
+ return rc;
+}
+
+static int __devexit gpio_ir_recv_remove(struct platform_device *pdev)
+{
+ struct gpio_rc_dev *gpio_dev = platform_get_drvdata(pdev);
+
+ flush_work_sync(&gpio_dev->work);
+ disable_irq_wake(gpio_to_irq(gpio_dev->gpio_nr));
+ free_irq(gpio_to_irq(gpio_dev->gpio_nr), gpio_dev);
+ platform_set_drvdata(pdev, NULL);
+ rc_unregister_device(gpio_dev->rcdev);
+ gpio_free(gpio_dev->gpio_nr);
+ rc_free_device(gpio_dev->rcdev);
+ mutex_destroy(&gpio_dev->lock);
+ kfree(gpio_dev);
+ return 0;
+}
+
+static struct platform_driver gpio_ir_recv_driver = {
+ .probe = gpio_ir_recv_probe,
+ .remove = __devexit_p(gpio_ir_recv_remove),
+ .driver = {
+ .name = TSOP_DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init gpio_ir_recv_init(void)
+{
+ return platform_driver_register(&gpio_ir_recv_driver);
+}
+module_init(gpio_ir_recv_init);
+
+static void __exit gpio_ir_recv_exit(void)
+{
+ platform_driver_unregister(&gpio_ir_recv_driver);
+}
+module_exit(gpio_ir_recv_exit);
+
+MODULE_DESCRIPTION("GPIO IR Receiver driver");
+MODULE_LICENSE("GPL v2");