Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / keyboard / opencores-kbd.c

diff --git a/kernel/drivers/input/keyboard/opencores-kbd.c b/kernel/drivers/input/keyboard/opencores-kbd.c
new file mode 100644 (file)
index 0000000..f8502bb
--- /dev/null
+++ b/kernel/drivers/input/keyboard/opencores-kbd.c
@@ -0,0 +1,130 @@
+/*
+ * 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>
+#include <linux/slab.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 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 = devm_kzalloc(&pdev->dev, sizeof(*opencores_kbd),
+                                    GFP_KERNEL);
+       if (!opencores_kbd)
+               return -ENOMEM;
+
+       input = devm_input_allocate_device(&pdev->dev);
+       if (!input) {
+               dev_err(&pdev->dev, "failed to allocate input device\n");
+               return -ENOMEM;
+       }
+
+       opencores_kbd->input = input;
+
+       opencores_kbd->addr = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(opencores_kbd->addr))
+               return PTR_ERR(opencores_kbd->addr);
+
+       input->name = pdev->name;
+       input->phys = "opencores-kbd/input0";
+
+       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 = devm_request_irq(&pdev->dev, irq, &opencores_kbd_isr,
+                                IRQF_TRIGGER_RISING,
+                                pdev->name, opencores_kbd);
+       if (error) {
+               dev_err(&pdev->dev, "unable to claim irq %d\n", irq);
+               return error;
+       }
+
+       error = input_register_device(input);
+       if (error) {
+               dev_err(&pdev->dev, "unable to register input device\n");
+               return error;
+       }
+
+       platform_set_drvdata(pdev, opencores_kbd);
+
+       return 0;
+}
+
+static struct platform_driver opencores_kbd_device_driver = {
+       .probe    = opencores_kbd_probe,
+       .driver   = {
+               .name = "opencores-kbd",
+       },
+};
+module_platform_driver(opencores_kbd_device_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Javier Herrero <jherrero@hvsistemas.es>");
+MODULE_DESCRIPTION("Keyboard driver for OpenCores Keyboard Controller");