Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759909Ab2BNJWz (ORCPT ); Tue, 14 Feb 2012 04:22:55 -0500 Received: from wolverine02.qualcomm.com ([199.106.114.251]:53849 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755168Ab2BNJWu (ORCPT ); Tue, 14 Feb 2012 04:22:50 -0500 X-IronPort-AV: E=McAfee;i="5400,1158,6619"; a="160667868" From: Ravi Kumar V To: Mauro Carvalho Chehab Cc: Jarod Wilson , Anssi Hannula , "Juan J. Garcia de Soria" , linux-media@vger.kernel.org, davidb@codeaurora.org, bryanh@codeaurora.org, tsoni@codeaurora.org, Ravi Kumar V , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH] msm: rc: Add support for MSM GPIO based IR Receiver driver. Date: Tue, 14 Feb 2012 14:52:34 +0530 Message-Id: <1329211354-12944-1-git-send-email-kumarrav@codeaurora.org> X-Mailer: git-send-email 1.7.8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7785 Lines: 274 Adds GPIO based IR Receiver driver. It decodes signals using decoders available in rc framework. Change-Id: Ic8b6bf5f3e7b9ad8fc68f7940cdb00749016f53b Signed-off-by: Ravi Kumar V --- drivers/media/rc/Kconfig | 9 ++ drivers/media/rc/Makefile | 1 + drivers/media/rc/gpio-ir-recv.c | 189 +++++++++++++++++++++++++++++++++++++++ include/media/gpio-ir-recv.h | 23 +++++ 4 files changed, 222 insertions(+), 0 deletions(-) create mode 100644 drivers/media/rc/gpio-ir-recv.c create mode 100644 include/media/gpio-ir-recv.h diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig index aeb7f43..6f63ded 100644 --- a/drivers/media/rc/Kconfig +++ b/drivers/media/rc/Kconfig @@ -256,4 +256,13 @@ config RC_LOOPBACK To compile this driver as a module, choose M here: the module will be called rc_loopback. +config IR_GPIO_CIR + tristate "GPIO IR remote control" + depends on RC_CORE + ---help--- + Say Y if you want to use GPIO based IR Receiver. + + To compile this driver as a module, choose M here: the module will + be called gpio-ir-recv. + endif #RC_CORE diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile index 2156e78..9b3568e 100644 --- a/drivers/media/rc/Makefile +++ b/drivers/media/rc/Makefile @@ -25,3 +25,4 @@ obj-$(CONFIG_IR_REDRAT3) += redrat3.o obj-$(CONFIG_IR_STREAMZAP) += streamzap.o obj-$(CONFIG_IR_WINBOND_CIR) += winbond-cir.o obj-$(CONFIG_RC_LOOPBACK) += rc-loopback.o +obj-$(CONFIG_IR_GPIO_CIR) += gpio-ir-recv.o diff --git a/drivers/media/rc/gpio-ir-recv.c b/drivers/media/rc/gpio-ir-recv.c new file mode 100644 index 0000000..cf6e7f6 --- /dev/null +++ b/drivers/media/rc/gpio-ir-recv.c @@ -0,0 +1,189 @@ +/* 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define GPIO_IR_DRIVER_NAME "gpio-rc-recv" +#define GPIO_IR_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; +}; + +static irqreturn_t gpio_ir_recv_irq(int irq, void *dev_id) +{ + struct gpio_rc_dev *gpio_dev = dev_id; + 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); + + 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; + + 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 = GPIO_IR_DEVICE_NAME; + rcdev->input_id.bustype = BUS_HOST; + rcdev->driver_name = GPIO_IR_DRIVER_NAME; + rcdev->map_name = RC_MAP_EMPTY; + + 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; + + + 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_threaded_irq(gpio_to_irq(pdata->gpio_nr), + NULL, gpio_ir_recv_irq, + 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); + + 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 = GPIO_IR_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"); diff --git a/include/media/gpio-ir-recv.h b/include/media/gpio-ir-recv.h new file mode 100644 index 0000000..3eab611 --- /dev/null +++ b/include/media/gpio-ir-recv.h @@ -0,0 +1,23 @@ +/* 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. + */ + +#ifndef __GPIO_IR_RECV_H__ +#define __GPIO_IR_RECV_H__ + +struct gpio_ir_recv_platform_data { + unsigned int gpio_nr; + bool active_low; + bool can_wakeup; +}; + +#endif /* __GPIO_IR_RECV_H__ */ + -- Sent by a consultant of the Qualcomm Innovation Center, Inc. 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