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    Subject[PATCH] 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>
    ---
    drivers/input/keyboard/Kconfig | 9 ++
    drivers/input/keyboard/Makefile | 1 +
    drivers/input/keyboard/opencores-kbd.c | 196 ++++++++++++++++++++++++++++++++
    3 files changed, 206 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 a6b989a..f0f4852 100644
    --- a/drivers/input/keyboard/Kconfig
    +++ b/drivers/input/keyboard/Kconfig
    @@ -310,6 +310,15 @@ 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 b5b5eae..d333bc6 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..29223c5
    --- /dev/null
    +++ b/drivers/input/keyboard/opencores-kbd.c
    @@ -0,0 +1,196 @@
    +/*
    + * File: drivers/input/keyboard/opencores-kbd.c
    + * Based on: bf54x-keys.c
    + * Author: Javier Herrero <jherrero@hvsistemas.es>
    + *
    + * Created:
    + * Description: OpenCores Keyboard Controller Driver
    + * http://www.opencores.org/projects.cgi/web/keyboardcontroller/overview
    + *
    + * Modified:
    + * Copyright 2007 HV Sistemas S.L.
    + *
    + * Bugs: Enter bugs at http://blackfin.uclinux.org/
    + *
    + * 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, see the file COPYING, or write
    + * to the Free Software Foundation, Inc.,
    + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
    + */
    +
    +
    +#include <linux/module.h>
    +#include <linux/version.h>
    +
    +#include <linux/init.h>
    +#include <linux/fs.h>
    +#include <linux/interrupt.h>
    +#include <linux/irq.h>
    +#include <linux/sched.h>
    +#include <linux/pm.h>
    +#include <linux/sysctl.h>
    +#include <linux/proc_fs.h>
    +#include <linux/delay.h>
    +#include <linux/platform_device.h>
    +#include <linux/input.h>
    +#include <linux/irq.h>
    +#include <linux/io.h>
    +
    +#define DRV_NAME "opencores-kbd"
    +#define NUM_KEYS 128
    +
    +struct opencores_kbd {
    + struct input_dev *input;
    + struct resource *addr_res;
    + struct resource *irq_res;
    + unsigned short *keycode;
    +};
    +
    +static irqreturn_t opencores_kbd_isr(int irq, void *dev_id)
    +{
    + unsigned char c;
    + struct platform_device *pdev = dev_id;
    + struct opencores_kbd *opencores_kbd = platform_get_drvdata(pdev);
    + struct input_dev *input = opencores_kbd->input;
    +
    + c = readb((void *)opencores_kbd->addr_res->start);
    + 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;
    + int i, error;
    +
    + opencores_kbd = kzalloc(sizeof(*opencores_kbd), GFP_KERNEL);
    + if (!opencores_kbd)
    + return -ENOMEM;
    +
    + opencores_kbd->keycode = kmalloc(NUM_KEYS * sizeof(unsigned short), GFP_KERNEL);
    + if (!opencores_kbd->keycode) {
    + error = -ENOMEM;
    + goto out;
    + }
    +
    + platform_set_drvdata(pdev, opencores_kbd);
    +
    + opencores_kbd->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    + opencores_kbd->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
    +
    + if (opencores_kbd->addr_res == NULL || opencores_kbd->irq_res == NULL) {
    + printk(KERN_ERR "insufficient resources\n");
    + error = -ENOENT;
    + goto out1;
    + }
    +
    + error = request_irq(opencores_kbd->irq_res->start, &opencores_kbd_isr, IRQF_TRIGGER_RISING, pdev->name, pdev);
    + if (error) {
    + printk(KERN_ERR DRV_NAME ": Unable to claim irq %d; error %d\n", opencores_kbd->irq_res->start, error);
    + goto out2;
    + }
    +
    + input = input_allocate_device();
    + if (!input) {
    + error = -ENOMEM;
    + goto out3;
    + }
    +
    + opencores_kbd->input = input;
    +
    + 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->keycodesize = sizeof(*opencores_kbd->keycode);
    + input->keycodemax = NUM_KEYS;
    + input->keycode = opencores_kbd->keycode;
    +
    + __set_bit(EV_KEY, input->evbit);
    +
    + for (i = 0; i < input->keycodemax; i++) {
    + opencores_kbd->keycode[i] = i;
    + __set_bit(opencores_kbd->keycode[i] & KEY_MAX, input->keybit);
    + }
    + __clear_bit(KEY_RESERVED, input->keybit);
    +
    + error = input_register_device(opencores_kbd->input);
    + if (error) {
    + printk(KERN_ERR DRV_NAME ": Unable to register input device (%d)\n", error);
    + goto out2;
    + }
    +
    + return 0;
    +
    +out3:
    + input_free_device(input);
    +out2:
    + free_irq(opencores_kbd->irq_res->start, pdev);
    +out1:
    + kfree(opencores_kbd->keycode);
    +out:
    + kfree(opencores_kbd);
    + platform_set_drvdata(pdev, NULL);
    +
    + 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_res->start, pdev);
    +
    + input_unregister_device(opencores_kbd->input);
    +
    + kfree(opencores_kbd->keycode);
    + kfree(opencores_kbd);
    + platform_set_drvdata(pdev, NULL);
    +
    + return 0;
    +}
    +
    +struct platform_driver opencores_kbd_device_driver = {
    + .probe = opencores_kbd_probe,
    + .remove = __devexit_p(opencores_kbd_remove),
    + .driver = {
    + .name = DRV_NAME,
    + }
    +};
    +
    +static int __init opencores_kbd_init(void)
    +{
    + return platform_driver_register(&opencores_kbd_device_driver);
    +}
    +
    +static void __exit opencores_kbd_exit(void)
    +{
    + platform_driver_unregister(&opencores_kbd_device_driver);
    +}
    +
    +module_init(opencores_kbd_init);
    +module_exit(opencores_kbd_exit);
    +
    +MODULE_LICENSE("GPL");
    +MODULE_AUTHOR("Javier Herrero <jherrero@hvsistemas.es");
    +MODULE_DESCRIPTION("Keyboard driver for OpenCores Keyboard Controller");
    --
    1.6.4.2


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