From: Mike Frysinger <vapier@gentoo.org>
To: linux-input@vger.kernel.org, Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-kernel@vger.kernel.org,
Javier Herrero <jherrero@hvsistemas.es>,
Bryan Wu <cooloney@kernel.org>, Dmitry Torokhov <dtor@mail.ru>
Subject: [PATCH v4] input/keyboard: new OpenCores Keyboard Controller driver
Date: Tue, 15 Sep 2009 22:00:40 -0400 [thread overview]
Message-ID: <1253066440-25555-1-git-send-email-vapier@gentoo.org> (raw)
In-Reply-To: <20090915055224.GD1132@core.coreip.homeip.net>
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
next prev parent reply other threads:[~2009-09-16 2:00 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-14 2:17 [PATCH] input/keyboard: new OpenCores Keyboard Controller driver Mike Frysinger
2009-09-14 6:17 ` Andrey Panin
2009-09-14 7:04 ` [PATCH v2] " Mike Frysinger
2009-09-14 7:25 ` Joe Perches
2009-09-14 17:40 ` [PATCH v3] " Mike Frysinger
2009-09-14 17:49 ` Dmitry Torokhov
2009-09-14 18:02 ` Mike Frysinger
2009-09-14 18:02 ` Mike Frysinger
2009-09-14 18:18 ` Javier Herrero
2009-09-15 5:52 ` Dmitry Torokhov
2009-09-15 11:16 ` Mike Frysinger
2009-09-15 11:16 ` Mike Frysinger
2009-09-15 16:23 ` Dmitry Torokhov
2009-09-15 16:23 ` Dmitry Torokhov
2009-09-15 16:39 ` Mike Frysinger
2009-09-15 16:39 ` Mike Frysinger
2009-09-16 2:00 ` Mike Frysinger [this message]
2009-09-16 3:45 ` [PATCH v4] " Dmitry Torokhov
2009-09-16 3:57 ` Mike Frysinger
2009-09-16 3:57 ` Mike Frysinger
2009-09-16 4:10 ` [PATCH v5] " Mike Frysinger
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