diff options
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/misc/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/input/misc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/input/misc/tegra_odm_scroll.c | 174 |
3 files changed, 182 insertions, 0 deletions
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 0b0b6182cadd..86d754feb241 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -333,4 +333,11 @@ config INPUT_PCAP To compile this driver as a module, choose M here: the module will be called pcap_keys. +config INPUT_TEGRA_ODM_SCROLL + tristate "Scrollwheel for NVIDIA Tegra ODM kit" + depends on ARCH_TEGRA && TEGRA_ODM_KIT + help + Say Y here if you want to enable a scrollwheel input device node + using the NVIDIA Tegra ODM kit scrollwheel adaptation interface + endif diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 42a5a5a90e75..3e06619a88f3 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -32,4 +32,5 @@ obj-$(CONFIG_INPUT_WINBOND_CIR) += winbond-cir.o obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o obj-$(CONFIG_INPUT_YEALINK) += yealink.o +obj-$(CONFIG_INPUT_TEGRA_ODM_SCROLL) += tegra_odm_scroll.o diff --git a/drivers/input/misc/tegra_odm_scroll.c b/drivers/input/misc/tegra_odm_scroll.c new file mode 100644 index 000000000000..7f291e677e8c --- /dev/null +++ b/drivers/input/misc/tegra_odm_scroll.c @@ -0,0 +1,174 @@ +/* + * drivers/input/misc/tegra_odm_scroll.c + * + * Scrollwheel input device using NVIDIA Tegra ODM kit + * + * Copyright (c) 2009, NVIDIA Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#define NV_DEBUG 0 + +#include <linux/module.h> +#include <linux/input.h> +#include <linux/platform_device.h> +#include <linux/kthread.h> + +#include <mach/nvrm_linux.h> +#include <nvos.h> + +#include <nvodm_scrollwheel.h> + +struct tegra_scroll_dev { + struct input_dev *input_dev; + struct task_struct *task; + NvOdmOsSemaphoreHandle sem; + NvOdmScrollWheelHandle odm_dev; +}; + +static int scroll_thread(void *pdata) +{ + struct tegra_scroll_dev *scroll = pdata; + NvOdmScrollWheelEvent Events; + + /* FIXME add a terminating condition */ + while(1) { + NvOdmOsSemaphoreWait(scroll->sem); + + Events = NvOdmScrollWheelGetEvent(scroll->odm_dev); + if (Events & NvOdmScrollWheelEvent_RotateAntiClockWise) { + input_report_key(scroll->input_dev, KEY_UP, 1); + input_report_key(scroll->input_dev, KEY_UP, 0); + } + if (Events & NvOdmScrollWheelEvent_RotateClockWise) { + input_report_key(scroll->input_dev, KEY_DOWN, 1); + input_report_key(scroll->input_dev, KEY_DOWN, 0); + } + + if (Events & NvOdmScrollWheelEvent_Press) + input_report_key(scroll->input_dev, KEY_ENTER, 1); + else if (Events & NvOdmScrollWheelEvent_Release) + input_report_key(scroll->input_dev, KEY_ENTER, 0); + } + return 0; +} + +static int __init tegra_scroll_probe(struct platform_device *pdev) +{ + struct tegra_scroll_dev *scroll = NULL; + struct input_dev *input_dev = NULL; + NvOdmOsSemaphoreHandle sem = NULL; + NvOdmScrollWheelHandle odm_dev = NULL; + int err; + NvOdmScrollWheelEvent events; + + sem = NvOdmOsSemaphoreCreate(0); + if (!sem) { + pr_err("tegra_scroll_probe: Semaphore creation failed\n"); + return -ENOMEM; + } + + events = NvOdmScrollWheelEvent_Press | + NvOdmScrollWheelEvent_Release | + NvOdmScrollWheelEvent_RotateAntiClockWise | + NvOdmScrollWheelEvent_RotateClockWise; + + odm_dev = NvOdmScrollWheelOpen(sem, events); + if (odm_dev == NULL) { + pr_err("tegra_scroll_probe: scroll wheel not found\n"); + err = -ENXIO; + goto err_scrollWheelnotfound; + } + + scroll = kzalloc(sizeof(struct tegra_scroll_dev), GFP_KERNEL); + input_dev = input_allocate_device(); + if (input_dev == NULL || scroll == NULL) { + err = -ENOMEM; + pr_err("tegra_scroll_probe: Failed to allocate input device\n"); + goto err_alloc_failed; + } + + scroll->input_dev = input_dev; + scroll->sem = sem; + scroll->odm_dev = odm_dev; + scroll->task = kthread_create(scroll_thread, scroll, "tegra_scroll"); + if (scroll->task == NULL) { + err = -1; + goto err_kthread_create_failed; + } + wake_up_process( scroll->task ); + + __set_bit(EV_KEY, input_dev->evbit); + __set_bit(KEY_ENTER, input_dev->keybit); + __set_bit(KEY_UP, input_dev->keybit); + __set_bit(KEY_DOWN, input_dev->keybit); + + platform_set_drvdata(pdev, scroll); + err = input_register_device(input_dev); + if (err) { + pr_err("tegra_scroll_probe: Unable to register input device\n"); + goto err_input_register_device_failed; + } + + return 0; + +err_input_register_device_failed: + NvOdmScrollWheelClose(scroll->odm_dev); +err_kthread_create_failed: + /* What to do? */ +err_alloc_failed: + kfree(scroll); + input_free_device(input_dev); + NvOdmScrollWheelClose(odm_dev); +err_scrollWheelnotfound: + NvOdmOsSemaphoreDestroy(sem); + return err; +} + +static int tegra_scroll_remove(struct platform_device *pdev) +{ + struct tegra_scroll_dev *scroll = platform_get_drvdata(pdev); + + /* FIXME How to destroy the thread? Maybe we should use workqueues? */ + input_unregister_device(scroll->input_dev); + NvOdmScrollWheelClose(scroll->odm_dev); + NvOdmOsSemaphoreDestroy(scroll->sem); + kfree(scroll); + return 0; +} + +static struct platform_driver tegra_scroll_driver = { + .probe = tegra_scroll_probe, + .remove = tegra_scroll_remove, + .driver = { + .name = "tegra_scrollwheel", + }, +}; + +static int __devinit tegra_scroll_init(void) +{ + return platform_driver_register(&tegra_scroll_driver); +} + +static void __exit tegra_scroll_exit(void) +{ + platform_driver_unregister(&tegra_scroll_driver); +} + +module_init(tegra_scroll_init); +module_exit(tegra_scroll_exit); + +MODULE_DESCRIPTION("Tegra scrollwheel driver"); |