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    Subject[PATCH v4] input/keyboard: new OpenCores Keyboard Controller driver
    Date
    From: Javier Herrero <jherrero@hvsistemas.es>

    Driver for the keyboard hardware documented here:
    http://www.opencores.org/project,keyboardcontroller

    Signed-off-by: Javier Herrero <jherrero@hvsistemas.es>
    Signed-off-by: Bryan Wu <cooloney@kernel.org>
    Signed-off-by: Mike Frysinger <vapier@gentoo.org>
    Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
    ---
    v4
    - add request_mem_region/ioremap

    drivers/input/keyboard/Kconfig | 9 ++
    drivers/input/keyboard/Makefile | 1 +
    drivers/input/keyboard/opencores-kbd.c | 175 ++++++++++++++++++++++++++++++++
    3 files changed, 185 insertions(+), 0 deletions(-)
    create mode 100644 drivers/input/keyboard/opencores-kbd.c

    diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
    index 3525c19..e363077 100644
    --- a/drivers/input/keyboard/Kconfig
    +++ b/drivers/input/keyboard/Kconfig
    @@ -311,6 +311,15 @@ config KEYBOARD_SUNKBD
    To compile this driver as a module, choose M here: the
    module will be called sunkbd.

    +config KEYBOARD_OPENCORES
    + tristate "OpenCores Keyboard Controller"
    + help
    + Say Y here if you want to use the OpenCores Keyboard Controller
    + http://www.opencores.org/project,keyboardcontroller
    +
    + To compile this driver as a module, choose M here; the
    + module will be called opencores-kbd.
    +
    config KEYBOARD_SH_KEYSC
    tristate "SuperH KEYSC keypad support"
    depends on SUPERH
    diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
    index 8a7a22b..ab35ac3 100644
    --- a/drivers/input/keyboard/Makefile
    +++ b/drivers/input/keyboard/Makefile
    @@ -23,6 +23,7 @@ obj-$(CONFIG_KEYBOARD_MAPLE) += maple_keyb.o
    obj-$(CONFIG_KEYBOARD_MATRIX) += matrix_keypad.o
    obj-$(CONFIG_KEYBOARD_NEWTON) += newtonkbd.o
    obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o
    +obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
    obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keypad.o
    obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
    obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o
    diff --git a/drivers/input/keyboard/opencores-kbd.c b/drivers/input/keyboard/opencores-kbd.c
    new file mode 100644
    index 0000000..3b9dd87
    --- /dev/null
    +++ b/drivers/input/keyboard/opencores-kbd.c
    @@ -0,0 +1,175 @@
    +/*
    + * OpenCores Keyboard Controller Driver
    + * http://www.opencores.org/project,keyboardcontroller
    + *
    + * Copyright 2007-2009 HV Sistemas S.L.
    + *
    + * Licensed under the GPL-2 or later.
    + */
    +
    +#include <linux/input.h>
    +#include <linux/interrupt.h>
    +#include <linux/io.h>
    +#include <linux/ioport.h>
    +#include <linux/kernel.h>
    +#include <linux/module.h>
    +#include <linux/platform_device.h>
    +
    +struct opencores_kbd {
    + struct input_dev *input;
    + void __iomem *addr;
    + int irq;
    + unsigned short keycodes[128];
    +};
    +
    +static irqreturn_t opencores_kbd_isr(int irq, void *dev_id)
    +{
    + struct opencores_kbd *opencores_kbd = dev_id;
    + struct input_dev *input = opencores_kbd->input;
    + unsigned char c;
    +
    + c = readb(opencores_kbd->addr);
    + input_report_key(input, c & 0x7f, c & 0x80 ? 0 : 1);
    + input_sync(input);
    +
    + return IRQ_HANDLED;
    +}
    +
    +static int __devinit opencores_kbd_probe(struct platform_device *pdev)
    +{
    + struct input_dev *input;
    + struct opencores_kbd *opencores_kbd;
    + struct resource *res;
    + int irq, i, error;
    +
    + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    + if (!res) {
    + dev_err(&pdev->dev, "missing board memory resource\n");
    + return -EINVAL;
    + }
    +
    + irq = platform_get_irq(pdev, 0);
    + if (irq < 0) {
    + dev_err(&pdev->dev, "missing board IRQ resource\n");
    + return -EINVAL;
    + }
    +
    + opencores_kbd = kzalloc(sizeof(*opencores_kbd), GFP_KERNEL);
    + input = input_allocate_device();
    + if (!opencores_kbd || !input) {
    + dev_err(&pdev->dev, "failed to allocate device structures\n");
    + error = -ENOMEM;
    + goto err_free_mem;
    + }
    +
    + res = request_mem_region(res->start, resource_size(res), pdev->name);
    + if (!res) {
    + dev_err(&pdev->dev, "failed to request I/O memory\n");
    + error = -EBUSY;
    + goto err_free_mem;
    + }
    +
    + opencores_kbd->addr = ioremap(res->start, resource_size(res));
    + if (!opencores_kbd->addr) {
    + dev_err(&pdev->dev, "failed to remap I/O memory\n");
    + error = -ENXIO;
    + goto err_rel_mem;
    + }
    +
    + opencores_kbd->input = input;
    + opencores_kbd->irq = irq;
    +
    + input->name = pdev->name;
    + input->phys = "opencores-kbd/input0";
    + input->dev.parent = &pdev->dev;
    +
    + input_set_drvdata(input, opencores_kbd);
    +
    + input->id.bustype = BUS_HOST;
    + input->id.vendor = 0x0001;
    + input->id.product = 0x0001;
    + input->id.version = 0x0100;
    +
    + input->keycode = opencores_kbd->keycodes;
    + input->keycodesize = sizeof(opencores_kbd->keycodes[0]);
    + input->keycodemax = ARRAY_SIZE(opencores_kbd->keycodes);
    +
    + __set_bit(EV_KEY, input->evbit);
    +
    + for (i = 0; i < ARRAY_SIZE(opencores_kbd->keycodes); i++) {
    + /*
    + * OpenCores controller happens to have scancodes match
    + * our KEY_* definitions.
    + */
    + opencores_kbd->keycodes[i] = i;
    + __set_bit(opencores_kbd->keycodes[i], input->keybit);
    + }
    + __clear_bit(KEY_RESERVED, input->keybit);
    +
    + error = request_irq(irq, &opencores_kbd_isr,
    + IRQF_TRIGGER_RISING, pdev->name, opencores_kbd);
    + if (error) {
    + dev_err(&pdev->dev, "unable to claim irq %d\n", irq);
    + goto err_unmap_mem;
    + }
    +
    + error = input_register_device(input);
    + if (error) {
    + dev_err(&pdev->dev, "unable to register input device\n");
    + goto err_free_irq;
    + }
    +
    + platform_set_drvdata(pdev, opencores_kbd);
    +
    + return 0;
    +
    + err_free_irq:
    + free_irq(irq, opencores_kbd);
    + err_unmap_mem:
    + iounmap(opencores_kbd->addr);
    + err_rel_mem:
    + release_mem_region(res->start, resource_size(res));
    + err_free_mem:
    + input_free_device(input);
    + kfree(opencores_kbd);
    +
    + return error;
    +}
    +
    +static int __devexit opencores_kbd_remove(struct platform_device *pdev)
    +{
    + struct opencores_kbd *opencores_kbd = platform_get_drvdata(pdev);
    +
    + free_irq(opencores_kbd->irq, opencores_kbd);
    +
    + input_unregister_device(opencores_kbd->input);
    + kfree(opencores_kbd);
    +
    + platform_set_drvdata(pdev, NULL);
    +
    + return 0;
    +}
    +
    +static struct platform_driver opencores_kbd_device_driver = {
    + .probe = opencores_kbd_probe,
    + .remove = __devexit_p(opencores_kbd_remove),
    + .driver = {
    + .name = "opencores-kbd",
    + },
    +};
    +
    +static int __init opencores_kbd_init(void)
    +{
    + return platform_driver_register(&opencores_kbd_device_driver);
    +}
    +module_init(opencores_kbd_init);
    +
    +static void __exit opencores_kbd_exit(void)
    +{
    + platform_driver_unregister(&opencores_kbd_device_driver);
    +}
    +module_exit(opencores_kbd_exit);
    +
    +MODULE_LICENSE("GPL");
    +MODULE_AUTHOR("Javier Herrero <jherrero@hvsistemas.es>");
    +MODULE_DESCRIPTION("Keyboard driver for OpenCores Keyboard Controller");
    --
    1.6.5.rc1


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